040 Level — User Manual

The 040 Level Sensor is a Bluetooth Low Energy (BLE) coupled inclinometer for leveling caravans, motorhomes, campervans and comparable trailers/vehicles. It measures longitudinal and lateral tilt (pitch and roll) and transmits the values to the 040 Level App, which uses them to calculate leveling and ramp recommendations.

Operating range: Indoor and outdoor use on a parked vehicle, operating temperature −40 °C to +70 °C, protection class IP67. The sensor is permanently mounted in the vehicle and operated exclusively via the app.

⚠️ In particular, the following are considered unintended use: - use as a calibrated/certified measuring device (e.g. for crane, construction or surveying tasks) — the device is not approved for such purposes; - use as a driving or safety aid while the vehicle is in motion — the calculation applies only to the stationary, secured vehicle; - any safety-critical application in which incorrect measurements could result in personal injury or property damage; - continuous operation under water or under pressurized water (beyond IP67).

Any other use is considered unintended use. Read and keep these instructions.

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These errors occur in practice and lead to incorrect results or damage — please avoid:

Misuse	Consequence
Sensor mounted with misaligned arrows (red/white not in vehicle direction)	Systematically incorrect pitch/roll values
Zeroing on an inclined surface	Incorrect zero point → all readings shifted
Use as a calibrated measuring device / for safety-critical measurements	Not approved, no measurement certification
Reading/driving off while driving as a driving aid	Not designed for this — risk of accident
Continuous use under water / pressure washer	Housing only IP67 — water ingress, defect
Opening the housing (except cover for battery), repairing, modifying	Defect, loss of warranty
Mounting on/in large metal parts, close to the frame	Poor wireless range, connection dropouts
Mixing old and new batteries / incorrect battery type	Leakage, short runtime, defect

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Please read these instructions before first use. Signal words: DANGER = immediate risk of death · WARNING = possible serious injury · CAUTION = possible minor injury · NOTICE = possible property damage.

⚠️ WARNING – Button cell (risk of death for children) Contains a button cell battery. If swallowed, it can cause severe internal burns within 2 hours and lead to death. Keep new and used batteries away from children. Seek immediate medical attention if a battery is swallowed or has entered the body. Always keep the battery compartment firmly closed.

⚠️ WARNING – Driving onto & rolling off Drive onto wedges/ramps only slowly and carefully — enough space, no obstacles, solid ground. Always secure the vehicle against rolling (handbrake, wheel chocks). The wedge calculation is a guideline, not a guarantee. While driving onto the ramps, nobody may be in front of, behind or under the vehicle. Follow the manufacturer's instructions for your levelling ramps – especially the load capacity and the highest step.

⚠️ WARNING – Radio interference The device transmits in the 2.4 GHz radio band. Keep sufficient distance from pacemakers and life-supporting electronic devices. In rare cases, interference with other devices cannot be ruled out.

CAUTION – Installation: Mount the sensor securely and no higher than 2 m — falling parts can cause injury. Do not mount directly next to heat sources (engine, exhaust, heater). Before opening the cover, briefly touch a metal part (protection against static discharge).

CAUTION – Battery: Use only the specified type CR2477 (3 V). Do not open, overheat, short-circuit, or throw batteries into fire. Do not mix old and new batteries. Do not touch a leaking battery with bare hands.

NOTICE – Do not open/modify the device: Do not open the housing except for the battery cover; do not repair or modify (only authorized specialists). If damaged, overheated, or behaving unusually, take out of service immediately. Clean only with a dry, soft cloth — no water, no solvents.

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040 Level consists of two parts that work together:

• The Sensor – a small, round wireless sensor with a battery that you mount permanently in your vehicle. It measures how tilted your vehicle is and sends this measurement via Bluetooth to your phone.
• The App – shows you the tilt in real time and calculates how to get your vehicle level ("in the water").

The app measures two values: longitudinal tilt (front/rear, "Pitch") and lateral tilt (left/right, "Roll"). The goal is always: both as close to 0° as possible.

Good to know You don't need to be exactly level. A few degrees of residual tilt is barely noticeable in the camper – the app helps you quickly get "good enough."

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• 1× 040 Level Sensor (with CR2477 button cell inserted)
• Adhesive tape for mounting
• Access to the app (free on App Store / Google Play)

Download the app for free from the App Store (iPhone) or Google Play (Android).

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1. Search for "040 Level" in the App Store or Google Play and install the app.
2. On first launch, the app asks for Bluetooth – this is mandatory, because only via Bluetooth does the sensor communicate with your phone.
3. On Android phones, Location is also requested. This is an operating system requirement for Bluetooth devices – please allow. (Your location is not tracked; see Privacy.)

📱 Important: the sensor does NOT appear in your phone's Bluetooth menu. You don't need to "pair" it there – that's intentional (it uses Bluetooth Low Energy, BLE). You select your 040 Level only in the app: tap the sensor field at the top and pick it from the list.

!App Store !Google Play

iOS 15+ / Android 7.0+

Tip for later Keep the app up to date with updates. New features and improvements come regularly – only with the latest update you get them.

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1. Unscrew the cap on the back of the sensor and check that the battery (CR2477) is inserted (positive pole facing up).
2. Press the small button inside for about 3 seconds until the small light (LED) starts blinking. Now the sensor is active.
3. Screw the cap back on.

⏱️ Important: the 30-second rule After activation, you only have about 30 seconds the first time to connect with the app. If you can't do it, the sensor goes back into deep sleep to save power – then simply press the button again for 3 seconds and try again right away.

Tip: First try out the sensor comfortably at home before installing it in your vehicle.

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For the app to calculate correctly, the sensor must be mounted the right way. On the sensor's label, you see two arrows: one red and one white.

Where in the vehicle? The location barely matters

In short: anywhere, as long as it's solid. The app measures the tilt of your vehicle – and that's exactly the same at every point in the camper. So the sensor does not need to sit in the center. Cabinet, storage box, a solid wall, the floor panel, under the bench seat – all great, as long as:

• the sensor is rigidly attached to the vehicle body – firmly screwed or fully bonded to a stiff surface. Not on thin, flexible plastic trim that flexes under load – that drifts and skews the readings.
• you can still reach it for the battery swap (pure convenience, not a measurement issue).
• it sits protected – not right behind the windscreen in full sun, since heat drains the battery.

⚠️ Never on moving parts. The sensor does not belong on the pop-up roof (nor its floor), the tailgate, the sliding door or a cabinet flap. These move relative to the vehicle when opened – the sensor would then measure the tilt of the flap instead of your camper, and the wedge calculation would be off. Mount it on the part of the vehicle that sits on the wheels.

The golden rule: one arrow points in a vehicle direction

One of the two axes must cleanly point in a main direction of the vehicle. Examples:

Mounting position	Red arrow	White arrow
Sensor lying flat	pointing forward (direction of travel)	pointing right
Sensor lying flat, other way	pointing forward	pointing left
Sensor standing upright	pointing up	pointing right

These are just examples – what's important is that both arrows cleanly point in one vehicle direction each.

In the app, you then set both arrow directions (red AND white) – see Sensor Configuration. From this, the app calculates itself what "front/rear" and "left/right" means.

Mounted crooked? No problem If you mounted the sensor slightly off, you can fine-tune this in the app (rotation axis / fine calibration) – you don't need to remove it.

⚠️ Caution after every cap opening The level electronics are in the cap, not in the base unit on the vehicle. Every time you open the cap (e.g., for battery change or button press) and screw it back on, the position can change by a few degrees. Best to screw the cap back on so the axis again points cleanly in the perfect vehicle direction. Then re-zero (see Zeroing) and – if the cap is slightly twisted – also correct the degree value in Sensor Settings → Expert (rotate axes / fine calibration).

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On the very first open, the app guides you step by step through everything important in a few short steps. You can view this introduction again at any time later (Settings → Help & Guide → Show intro again). The Quickstart item there opens the short guide on our website instead.

• Welcome – "Hey. Level your van. No measuring millimetres. No guessing." The app takes the language from your phone; all 24 languages are in the settings menu later.
• Turn on the sensor – take off the cap, press the button for 3 seconds until the LED blinks.
• Bluetooth – turn on Bluetooth on your phone; that's all you need to do in your phone's settings.
• Sensor in the app – you establish the connection only in the app, not in your phone's Bluetooth settings. The sensor won't even show up there – that's correct.
• Extras – brief overview of the Extras & In-App Purchases, e.g. third-party sensors. Just move on if you don't need them.
• Safety notes – the most important notes in brief. Only once you tap "Read – I agree" can you continue.
• Test first? – get started right away or make further settings.
• Attach to the vehicle – attach the sensor firmly to the vehicle, align the arrow.
• Consent – privacy choices, see Section 7.
• Age group – only helps us improve the app.

You set vehicle type, dimensions and ramp aid (wedge, cushion, jack or step wedge) afterwards under Design & Vehicle (see Section 24). The more precise, the better the wedge calculation.

Use the arrow at the bottom to proceed step by step; the small badge at the top shows where you are (e.g. "3 / 7"). If a page has more text than fits on the screen, a small red circle with an arrow pulses in the lower right – then it's worth scrolling down.

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Right at the start, the app asks what you'd like to allow. You decide – and can change everything at any time in the settings. All four levels are off by default: without your consent, the app sends neither crash reports nor usage data.

Level	What for	Default
Crash reports	Crash and error reports – helps us find bugs and improve the app. Only with your consent, revocable at any time.	off
Usage analytics	Which features are used (pseudonymous, Firebase Analytics) – helps us improve the app.	off
Location analytics	Your approximate location (rounded to about 10 km) for the weather widget; combined with usage analytics, also a rough indication of which regions people level in.	off
Push & offers	Offers, discounts, and news via push. Can be turned off at any time.	off

At the top you'll find Accept all and Reject all. Via Select individually you expand the four toggles and set each level yourself – every toggle is saved immediately. Leveling always works – even if you reject everything: the sensor's readings stay on your phone.

What else is transmitted:

• Feedback – only if you send it yourself. It goes to our own server and from there via email to our team. Any attached image is resized beforehand and transmitted without location or device data; we delete the message and image after no more than 12 months.
• Consent counter – an anonymous signal of which levels you allowed (yes/no), without any device or user identifier.
• Sensor authenticity check – a one-time, non-reversible checksum during initial setup (not the MAC address itself).

The app no longer sends an installation notification. Connections to our servers run through Cloudflare. Full details are in the Privacy Policy.

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No matter which view you're in – at the top you always see your sensor's status:

Element	What it shows & what you can do
🌡️ Temperature	The temperature measured by the sensor. Tap it to switch between °C and °F. The color changes from black (cool) through yellow to red (hot).
Sensor name (center)	Your connected sensor's name. Tap it to open the sensor list, select another sensor, or disconnect. If nothing is connected, the field pulses slightly.
📶 Signal	How strong the Bluetooth connection is (more bars = better).
🔋 Battery	Charge level of the sensor. If the battery gets low, the icon turns yellow, then red.

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The first view shows your vehicle from above with a round spirit level (like a classic bubble level). The bubble moves in the direction your vehicle is tilted. If everything is within tolerance, the display turns green; otherwise yellow or red.

Tap the vehicle or a slider and the app explains what the colours mean:

• Green – your vehicle is level, within the tolerance you set.
• Yellow – slightly tilted, easy to compensate with wedges or lifting cushions.
• Red – clearly tilted: change your spot or use the wedge calculation.

You switch between views by swiping left/right or tapping the toggle pill at the top right.

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Here you see your vehicle from the side, with two large values:

• Up / Down (Pitch): how much the front or rear is hanging. Plus = front high.
• Right / Left (Roll): how much the left or right side is hanging.

With the small toggle pills at the top left, you can rotate the view direction (from front / from rear) and swap the sides – so the display matches your actual view of the vehicle.

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The third view shows two linear level strips (one for front/rear, one for left/right). Some people prefer this display over the round spirit level – try out what works better for you. Switch via the pill at the top right.

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This is one of the most important displays. At the wheels, small "pills" appear with a number – they show live how many centimeters that wheel would need to be compensated. The color tells you immediately:

• Green – This wheel is level.
• Yellow – Compensation is needed here, but your driving aids are sufficient.
• Red – Clearly tilted, your driving aids are not sufficient. Change parking spot or park differently.

The pills automatically "jump" to the wheels where compensation is needed. This way you can see while slowly driving forward – even before you start the wedge calculation – whether your parking spot works.

Prerequisite For the cm values to be correct, your vehicle dimensions and driving aid dimensions should be stored in settings (see Design & Vehicle).

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At the top of the views, a slim chip shows the local weather (e.g., "22°C · Cloudy · 12 km/h"). This is purely a comfort extra and has nothing to do with leveling.

• Tap opens the detailed weather view with 7-day forecast.
• Long press refreshes the weather.

The weather view shows temperature, wind, humidity and Fog (fog fraction in %) – this tile used to be called "Visibility".

The app fetches the weather via our own weather server (data centre in Frankfurt). It only receives your approximate location (rounded to approx. 10 km) and the app language, and uses them to request the weather from the Norwegian Meteorological Institute MET Norway; place names come from our own copy of the GeoNames dataset (both licensed under CC BY 4.0, credited at the bottom of the weather view). The server does not store your IP address, and no third-party weather service receives any data from your phone. If you haven't allowed Location analytics, it says "Weather: location off" – that's fine, the app works just as well without weather.

Older app version? Until you update, older versions still fetch the weather directly from the Open-Meteo service and still show "Visibility" instead of "Fog". Update the app and everything runs via our server.

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At the bottom edge, a bar floats with three menus – the sound menu on the left, vibration menu on the right, settings menu in the center:

Button	Tap	Long press
🔊 Sound (left)	Opens sound menu (volume, axes).	Quickly toggles sound on/off.
📳 Vibration (right)	Opens vibration menu (axes).	Quickly toggles vibration on/off.
☰ Menu (center)	Opens all settings.	–

Zeroing is found in settings under "Sensor Configuration", wedge calculation is activated directly in the top view (see Section 17).

Important for beginners Some buttons respond differently depending on whether you tap briefly or press and hold (about a second). Where "long press" has an extra function, it's noted in this manual.

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This is how most people use their 040 Level. You don't need to memorize anything – the app guides you:

1. Leave home. The sensor is permanently in the vehicle, the app is set up (vehicle type, dimensions and your wheel chocks are entered once).
2. Arrive at parking spot. You choose a spot.
3. Open app. The sensor connects automatically. Name, temperature, battery and signal appear at the top.
4. Park forward slowly. Pay attention to the colored pills at the wheels: They already show whether your driving aids are sufficient for this spot (green/yellow = good, red = too sloped).
5. Found a good position (everything yellow or already green)? Then tap Wedge Help at the bottom.
6. Read wedge instructions. The app now shows exactly where which wedge goes.
7. Place wedges, get in, drive on slowly and carefully.
8. Done. Ideally, your vehicle is now level. A quick cross-check never hurts.

⚠️ Always remember The calculation is a theoretical help, not an exact science. Always drive on slowly and with awareness of your surroundings. Apply parking brake, secure against rolling away.

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"Zeroing" means: You tell the app once what "level" means for your vehicle. Because hardly any sensor is mounted perfectly level in the vehicle.

1. Park the vehicle on a as flat as possible surface (e.g., in the garage or driveway).
2. Tap Zeroing at the bottom – or in the sensor menu, swipe the "Zeroing" area to the right.
3. Hold still briefly (the app measures for about 1 second). After that, it says "Zeroed." – from now on, the app shows all deviations from exactly this point.

If you need it very precise, you can long press "Zeroing" in the sensor menu to manually enter or reset the zero points.

⚠️ Re-zero when … you've re-mounted the sensor, opened the cap (battery change) or changed the orientation in the app. The zero point is not automatically adjusted when changing orientation.

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In the top view, you turn on wedge calculation with a switch. The app then calculates for your current position where and how high you need to drive on, and draws the wedges directly at the wheels.

Recalculate? There's no separate "Recalculate" button – simply toggle wedge calculation off and on briefly, then the app recalculates with your current position.

Only in top view The wedge instructions intentionally only appear in the top view. The side view shows no wedge help – that's intentional to keep it clear.

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This is the crucial trick for placement:

• Wedge WITHOUT white pill → slide it directly against the tire. You drive onto this wedge completely.
• Wedge WITH white pill – the pill shows a distance in centimeters. Place the wedge that far in front of the tire contact patch. You then drive onto the wedge only as far as needed for the compensation.

Why this works: A wheel that only needs to be lifted slightly doesn't need the full wedge height – so you place the wedge a bit in front of the wheel so you only drive up partially. The highest wheel to be lifted gets the wedge directly against the tire.

Wedge display	Meaning
no white pill	Wedge directly against the tire
e.g., "42 cm"	Place wedge 42 cm in front of the tire

Only 1 wedge? With just one wedge, it rarely becomes perfectly level – for proper support, you usually need two or more. The app tells you this too.

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The yellow exclamation point is always visible. When you tap it, the app shows the most important safety notes. You can also tap directly on the vehicle or the wedges to get more help.

Quick check – before you drive on: - Look around: enough space, no obstacles, solid ground. - The wedge calculation is an approximation. Loading, weight distribution and suspension travel change the result. - No ground is perfectly flat – and wedges can sink. Measure again after driving on. - Always secure your vehicle against rolling – handbrake on, chocks in place. - While driving onto the ramps, nobody may be in front of, behind or under the vehicle. - Follow the manufacturer's instructions for your levelling ramps – especially the load capacity and the highest step. - The values are guide values. You use the app on your own responsibility – check for yourself that your vehicle is standing safely before you get out.

The app asks for your agreement to these notes the first time you start it.

The app also warns when the ground is too sloped for your wedges: "Ground too sloped, change parking spot." Then even the best wedge won't help – find a flatter spot.

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The app calculates with a simplified model: it assumes your vehicle is a rigid plate. In reality, every vehicle is different:

• Loading & weight distribution – a fully loaded rear end suspends differently.
• Suspension – the tires and chassis give way.
• Ground – wedges sink into grass or gravel; a few centimeters further, there's often already another dip.

That's why: The wedge calculation gets you quickly very close to level. You do the final fine-tuning by feel – and as said, a few degrees is barely noticeable in the camper anyway. See the app as a smart alignment aid, not a precision instrument.

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Instead of wedges, you can also define lifting cushions or a car jack in the settings. In that case, the instructions read along the lines of "inflate / lift until everything is green" rather than referring to a wedge position.

Step Wedge (Folding Wedge with Fixed Steps)

If you have a folding wedge with several fixed steps, select the type Step Wedge under Settings → Design & Vehicle → Drive-On Aid. Then enter:

• the number of steps (1 to 6),
• the height of each step – as it is on your folding wedge, from bottom to top,
• the total length of the wedge – the app divides it evenly across the steps and shows you the length per step.

With the step wedge, your tire always sits on a flat step. For each wheel, the app picks the step that is closest to the required height – if equal, the lower one – and tells you how far to drive on (e.g. "Drive on to the middle of step 2 – about 25 cm from the start of the wedge"). Anything still missing is shown next to it as Remaining. If the highest step is not quite enough, the app shows "Highest step is not quite enough".

Drawbar

If you have a trailer/caravan, the drawbar is taken into account: the app tells you how many centimetres you need to crank it up or down instead of placing a wedge at the front. If the crank's adjustment range is not enough, the app points this out (additional wedge or a different spot).

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You don’t have a 040 Level Sensor (yet)? The app can also use your phone’s motion sensors (Phone IMU). The process is slightly different than with the fixed sensor – we recommend proceeding as follows:

1. Prepare beforehand – on level ground. Set up your phone before you drive onto the pitch, while you are still on as level a surface as possible.
2. Position the phone securely. Place or clamp the phone in a fixed, visible location in the vehicle where its position will not change – e.g. in the phone holder, in the door’s side storage compartment, or on a level surface in the center console. It must not wobble or slip.
3. Set the orientation. In the sensor menu, set how the phone is positioned (red and white arrow – as with the sensor). A red/white arrow in the app shows you which way the phone is “facing".
4. Zero the phone. Zero the phone while it is stationary and level – make sure it does not wobble.
5. Start driving only afterward. Once the phone has been properly zeroed, drive to your pitch and take the measurement there. Avoid moving the phone in between if possible.

This is why we recommend the 040 Level Sensor: Once set up, the fixed sensor remains permanently correctly positioned and zeroed – so you don’t have to worry about forgetting to align and zero it. This is a major advantage, especially when wild camping or driving off-road: Level surfaces are rare there, and it is often also impossible to position the phone level in the vehicle.

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When driving on, the app emits sounds like a parking sensor – the faster the sounds, the closer you are to level. In the sound menu (button "Sound") you configure this:

• Longitudinal axis (front/rear) (high tone, 1000 Hz) – switch on/off + volume. With the test button, you can hear it.
• Lateral axis (left/right) (low tone, 500 Hz) – same, switch, volume, test.

This way you can distinguish by sound which axis is being indicated. Long press the sound button to quickly toggle sound completely on/off.

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If you prefer it quiet, use vibration instead of sound. Here too, per axis:

• Up / Down – "One long pulse" pattern.
• Right / Left – "Two short pulses" pattern.

Each axis can be turned on/off individually, with a test button to try it out. The same applies here: faster vibrations = closer to level.

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Here you set up your vehicle – this is the basis for the wedge calculation:

• Vehicle type – Caravan, van, motorhome, motorhome (dual axle), car, tent trailer or dual axle.
• Larger display – turns on larger text and larger buttons everywhere.
• Vehicle dimensions – track width (axle width) and wheelbase (axle distance), for dual axles also their spacing. The more precise, the more accurate the wedge heights.
• Driving aid – type (wedge / step ramp / pad / jack) and quantity. For wedge, you enter length and height, for the step ramp the number and height of the steps plus the total length (see Section 21), for pads/jack the maximum lift height.
• Length unit – switch between cm and inch.

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Everything around the sensor itself:

• Zeroing (calibration) – as described in Section 16. Swipe to zero, long press for manual entry/reset.
• Sensor orientation – here you set where the red and white arrows point (front/rear/left/right/up/down). The app checks that they are perpendicular to each other.
• Tolerance range – at what deviation the app still shows "Level" (green). Small = very precise, large = more relaxed.

Expert settings

• Smoothing – calms jittery values (0 = off).
• Fine calibration Up/Down and Right/Left – tiny manual correction (−45° to +45°), if the sensor is slightly off.
• Rotate axes (Yaw) – rotates the coordinate system slightly left/right if the sensor is mounted at an angle or the cap is twisted.
• Temperature offset – fine correction of displayed temperature.
• Decimal places – how precise the degree values are displayed (0, 1 or 2 decimal places).
• Maximum deflection – how many degrees the slider/spirit level shows at full scale.

Reminder After changing orientation, always re-zero.

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Have multiple vehicles but only one sensor? No problem with profiles. A profile stores vehicle type, dimensions, driving aids and the zeroing – everything that makes up a vehicle.

• Create new profile – via the + button on the active profile. A copy is created that you can then adjust.
• Rename – change the name in the profile (e.g., "Caravan" / "Motorhome"). You can also rename the sensor directly in the sensor list (there long press the sensor).
• Switch profile – tap the desired profile. The app immediately loads the matching vehicle including dimensions and wedges.
• Delete – in the profile via "Delete" (with confirmation prompt).

This way you simply move the one sensor from one vehicle to another and select the matching profile in the app.

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The app performs leveling with the 040 Level Sensor completely without an additional purchase. For special cases there are Extras that you unlock individually in the app. You can find them under Settings and, on first launch, on the "Extras" page.

How the purchase works

• Unlock permanently – a one-time purchase, valid forever on all devices with your Apple ID or Google account.
• Rent for one week – a one-time payment for seven days, e.g. for a vacation or to try it out. No subscription: The rental does not renew automatically, you don't need to cancel anything.
• Welcome price – within the first seven days after installation you get the permanent purchase at a lower price. The weekly rental always costs the same.
• Prices – the app always shows the price from the App Store or Google Play in your local currency.

Restore purchase

Have you reinstalled the app or got a new phone? Your purchases usually come back automatically on launch. If not, tap Restore purchase on the extras purchase page – it is free. Requirement: the same Apple ID or Google account as when you bought it.

Third-Party Sensors

You already have a level sensor from another brand in your vehicle? With the Third-Party Sensors extra you use it with all features of this app: wedge calculation, vehicle view, custom zero point, custom smoothing, and a custom profile for each sensor.

Supported sensors: CaraTech EasyLevel and WitMotion. The purchase page shows you beforehand which values the respective sensor provides (e.g. inclination, temperature, battery).

How to pair a third-party sensor

1. Open Settings → Third-Party Sensors and unlock the extra (purchase or rent for one week).
2. Switch on the third-party sensor and place it near the phone.
3. Tap the Sensor selection at the top. Below the divider line all third-party sensors in range appear – without a purchase, only the row "Connect third-party sensor" with a lock is shown there.
4. Tap the sensor. The search can take up to 30 seconds.
5. As with the 040 sensor, set the mounting position and zero it (see Zeroing).

Good to know: Some third-party sensors report less frequently when idle. In that case, give them a little nudge – they are usually available immediately afterwards.

All mentioned brands belong to their respective owners. There is no cooperation with the manufacturers; the names are listed here only so you can recognize which device is meant.

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The app speaks 24 languages. Tap your language – the app switches immediately. (This manual is also available in several languages.)

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The same four levels as at first launch (see Section 7) can be changed here anytime: Crash reports, Usage analytics, Location analytics and Push messages & offers – with Accept all or Reject all also in one go. If you switch a level off, transmission stops immediately. You'll also find the Privacy Policy here and, with Request data deletion, the option to reset your analytics settings.

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Under Settings → Help & Guide you find support, in three blocks:

• Sensor won't connect? – Quick help – a checklist to tick off, step by step (see Troubleshooting).
• Show intro again – go through the first-start introduction once more.
• FAQ – quick answers directly in the app.
• Quickstart – the short guide on our website.
• User manual – this handbook.
• Help – our support centre on the web.
• Support – contact via email.
• Give feedback – directly from within the app.
• Website – app.040parts.com.

The imprint is further down under Legal.

🐛 Found a bug? Please report it! If something seems strange or an error occurs, you can report it directly in the app: Help & Guide → Give feedback. Select "Bug" or "Idea", briefly describe what happened, and attach an image if you like (screenshot or photo) – the app scales it down first and removes location and device data. You can provide your email if we have follow-up questions. Your report goes to our own server and from there by email to our team – not to third parties. Every report helps us improve the app – thank you very much!

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Under "Updates & News" (also accessible via the bell/campaign symbol at the top in settings) you'll find news from 040 Level: new features, tips, fresh accessories. Unread items are marked with a dot.

• Tap opens the message in full length; it's marked as read in the process.
• Mark all read marks everything at once.
• Done moves a message to the archive, which you can open separately.

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Want updates and offers via email? Sign up for the newsletter (name, email, optional age group). You confirm the privacy policy and agree to receive (double opt-in via confirmation email). No account needed, can unsubscribe anytime.

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Problem	Solution
Sensor not found	Do not search in the phone's Bluetooth menu – the sensor only appears in the app! Bluetooth on? Press button for 3 seconds (LED flashes). Connect within ~30 seconds. Move phone closer to the sensor.
Connection drops	Check range/signal, check battery. The app usually reconnects by itself.
Sensor is displayed but "Configuration failed"	In most cases this helps: a full restart, see box below.
Values are tilted even though it's level	Re-zero on a flat surface. Check orientation (red/white).
Values are jittery	Increase smoothing in the expert settings.
Pills are red	Surface too tilted for your loading aid – change location or reposition.
Inaccurate after battery change	The cover has shifted the position – check orientation and re-zero.
Extra missing after reinstallation	Open purchase page → Restore purchase. Use the same Apple ID or Google account as when purchasing.
Third-party sensor not found	Extra unlocked? Sensor turned on and nearby? Briefly nudge it, wait up to 30 seconds.

Quick help: sensor won't connect?

1. Do not pair in the phone's Bluetooth menu. The sensor connects only inside the app, under "Choose sensor".
2. Turn on Bluetooth and location and allow all prompts from the app.
3. Open the sensor and press the button for about 3 seconds until the LED blinks several times. If it lights up once for a long time, you pressed too long – the sensor goes back to sleep. Press briefly again.
4. Move close to the phone, open "Choose sensor" and wait a moment.
5. Take the battery out briefly and put it back in, then repeat step 3.
6. Close the app and restart the phone.
7. Reinstall the app, go through the intro and allow everything.
8. Try another phone. If it works there, the first phone's Bluetooth is the cause.

If none of this helps, tap "Send diagnostics to us" at the end of the checklist. That shows us what is going on.

You can find the checklist in the Help menu at the top of the app and as the button "No sensor found? Open checklist" at the bottom of the "Choose sensor" menu.

🔁 The full restart (helps in almost all connection issues) If the sensor absolutely refuses to connect or shows "Configuration failed", a restart on both sides helps – sensor AND phone: 1. Remove the battery from the sensor 2. Uninstall the app from the phone 3. Fully power off the phone and turn it back on 4. Reinstall the app 5. Reinsert the battery into the sensor

This typically clears stubborn Bluetooth dropouts immediately – the sensor is usually recognised within a few seconds afterwards. If this doesn't help unexpectedly: test a second phone (Android or iPhone) with the same sensor to narrow it down. If it connects there, the issue lies with the first phone's Bluetooth stack – then simply repeat the restart above carefully.

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The runtime depends on the transmit interval and how you use the sensor. You can check the battery level in the app at any time. To replace, unscrew the cap with the tool, remove old cell, insert new CR2477 with positive pole facing up, close cap. Then check orientation and re-zero.

Clean only with a dry, soft cloth – no water, no solvents.

⚠️ Button cells are dangerous A swallowed button cell (CR2477) can cause severe internal burns within 2 hours. Keep sensor and battery away from children, always keep battery compartment tightly closed. If you suspect swallowing, seek medical attention immediately.

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Property	Value
Product name	040 Level Sensor (Art. FBM_158_1_Level_App)
Radio chip	Nordic nRF52 series
Housing	Round, ABS · Ø 38.6 mm × 15.7 mm · approx. 25 g
Protection class	IP67 (dustproof, 1 m / 30 min waterproof)
Battery	CR2477 (3 V, replaceable)
Operating temperature	−40 °C to +70 °C
Radio	Bluetooth Low Energy 4.0/5.0 · 2.4 GHz ISM · −40 to +4 dBm EIRP
App	iOS 15+ / Android 7.0+

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Store the sensor in a dry place and protected from direct heat, within the temperature range of −40 °C to +70 °C. If not used for an extended period (several months), we recommend removing the battery to prevent leakage. Keep the sensor and batteries out of the reach of children.

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The 040 Level Sensor must not be disposed of in household waste (electronic waste, WEEE). Take it to a collection point. Don't dispose of used batteries in household waste either – return them to the store or recycling center.

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The statutory warranty applies to the 040 Level Sensor. We do not provide any additional voluntary warranty beyond this — your statutory warranty rights against the seller remain entirely unaffected by this and are not limited as a result. In the event of a warranty claim, contact your dealer with a description of the defect and proof of purchase.

Liability: The values displayed in the app and the wedge calculation are reference values — loading, suspension, and ground surface influence the result. No liability is accepted within the legally permissible framework for damage caused by improper use, unauthorized modifications, or non-compliance with these instructions. Responsibility when driving onto and securing the vehicle remains with the user.

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Term	Meaning
Pitch (Up/Down)	Longitudinal tilt front/rear. Plus = rear higher than front.
Roll (Right/Left)	Lateral tilt. Plus = right side higher.
Zeroing / Calibrating	Tell the app: "how I'm standing now is level."
Tolerance range	How precise you are – within = green.
BLE	Bluetooth Low Energy – power-saving Bluetooth variant.
IP67	Dustproof and temporarily waterproof.
Deep sleep	Power-saving mode of the sensor – wake with button press (3 sec.).
Yaw	Rotation around the vertical axis – correction for obliquely mounted sensors.
CR2477	Button cell: Lithium, 24 mm diameter, 7.7 mm height.
Step ramp	Folding ramp with fixed steps – the app tells you per wheel which step fits.
Fog	Fog fraction in % in the weather view (data: MET Norway).

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The full EU Declaration of Conformity (DoC-040LS-001-2026) for the 040 Level Sensor (Art. FBM_158_1_Level_App) is available as a separate page:

→ View EU Declaration of Conformity

Manufactured by: Mixcover GmbH · Neumann-Reichardt-Str. 27–33 · 22041 Hamburg · Germany

Directives: RED 2014/53/EU · RoHS 2011/65/EU · WEEE 2012/19/EU

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See you on the road — euer 040 Team