Sensor FAQ

You will receive the AppWeigh Bluetooth enabled scale sensor and fittings to connect the sensor to your air suspension in Australian measurements (6mm/8mm/10mm/12mm). This sensor will then broadcast your weight information to the AppWeigh app where you will view the weight on any Bluetooth enabled smart device (phone, tablet).

No. We do not try to up-sell you anything extra, as we’ve already included everything required for a standard install with the AppWeigh kit.

For heavy terrain or piece of mind, consider using the AppWeigh Tough Kit.

For increased range, it may be beneficial to acquire additional airline to run to the side or front of the equipment, and mount the sensor(s) closest to where the user will be.

The App Weigh app is FREE to download and use, and works in coordination with the AppWeigh Bluetooth enabled scale sensor(s). It is available for download on both the Apple App Store and Google Play store.

The app will work on any smartphone or tablet (Apple iOS, Droid, etc.) that is Bluetooth capable.

You only need to install the AppWeigh scale sensor(s). Our free app then receives the weight information from the sensor you connect to your air suspension of the axle group being monitored.

The App Weigh scale sensor quickly installs by connecting the included fitting into the airline of your air suspension being monitored. Because it is powered by its own internal battery, it requires no electrical wiring. In fact, it is such a simple installation that many of our customers are able to install it themselves in a matter of minutes.

One sensor is required for each leveling valve of each axle group being monitored. Most axle groups will typically have only one leveling valve, so most truck/trailer combos will require two sensors (one for the drive axles of the truck, and one for the axles on the trailer). Confirm for your specific equipment.

A single sensor on the axle group is generally sufficient to provide the readings for calibration and weight reporting provided that calibration is done on a level surface. For systems with dual height control valves or levelling valves, two sensors may be preferrable – one for each height control valve. If you choose to fit 2 sensors, during setup you will add a single axle weight limit for the drive axle group, and then pair both sensors into the App and the system will calibrate and display the distributed weight for that axle group. For dual levelling valves especially, accurate calibration is imperative for accurate weights.

Direct line of sight can be 30m+. However, several factors can affect the range, including the individual receiving phone or tablet being used, as well as any physical obstructions between the scale sensor and the smart phone/tablet in use. To increase range, install the scale sensor out-from-under the truck/trailer where it can be seen by the user (mounting the sensor closest to where the user will be).

The AppWeigh scale uses the latest sensor technology to provide a weight that is within 90kg or better for each axle group being monitored. (It is important that the truck/trailer be parked on a level surface with the brakes off during both calibration and while viewing the weight to ensure accuracy.)

No, you will only need to install the AppWeigh sensor. The scale that displays your truck and/or trailer weight information is part of the application (app) you download to your smartphone/tablet. The weight of your truck and/or trailer is then viewed on your phone/tablet, showing each axle group being monitored as well as gross weight.

The battery life of the scale sensor depends partly on how frequently the equipment that the sensor is installed or is in use. Assuming that the truck/trailer is in constant use, the expected battery life is approximately 6 months.

Important comments:

1. Older sensors (pre-2024) will consume more battery when in FAST broadcast mode (~2 seconds). You can expect the battery use to be less than 6 months. See below question for setting the frequency of broadcasts.
2. Vehicles left unattended and parked up under pressure will continue to broadcast their weights
3. Dumping air from the suspension will reduce pressure imposed onto the sensor and allow it to enter sleep mode until sufficient pressure is re-established to reinitiate sensor operation.

YES. The battery is easy to replace by unscrewing the cap on the sensor casing. Batteries are inexpensive, and available to buy in stores or online.

CR2032 Lithium (3volt) button battery.

1. For sensors purchased from 2024 onwards and using the updated app, the sensor should automatically change the frequency of measurement readings. For example, when the vehicle is being loaded (e.g. grain), i.e. continuous pressure changes, it should report every ~2 seconds. After loading, the sensor will automatically return to the normal update frequency (~15 seconds)
2. For sensors purchased pre-2024, you may need to re-set up and pair the sensor with the changed broadcast rate (FAST or NORMAL). The more frequent the broadcast rate, the more battery use is required. To change the broadcast rate:
   1. Go into the Truck or Trailer profile, click EDIT, click SET UP SENSOR, click UNPAIR and then REPAIR.
   2. After REPAIRING you will be able to select the broadcast mode that you prefer, without losing any calibration settings.
   3. Selecting a weight refresh rate of “Fast” will update every 2 seconds and will decrease the life of your battery. Selecting a weight refresh rate of “Normal” will update every 15 seconds and provide maximum battery life.

The scale is calibrated by simply entering the axle group weights into the app both when empty, and again when fully loaded. It is best to obtain your weights from a certified scale to ensure accurate calibration (from a CAT Scale, for example).

The calibration process is intended to be a one time process. However, it is advised that you confirm the accuracy of the AppWeigh scale against a certified in-ground scale once or twice per year, or following any major maintenance or addition to your equipment, and re-calibrate if needed.

YES! All weight data is saved on the cloud and can be accessed at anytime via the user’s secured account.

1. Ensure the installation & sensor calibration have been carried out correctly e.g. sensor (kit) has been installed behind the levelling valve
2. Ensure the vehicle has an operating air supply to the air bags.
3. Recheck unladen and laden weights – ensure that these weights (captured on the AppWeigh app) have been obtained from a certified weigh scale(or weighbridge) and NOT from memory.

You may need to increase the pressure on the Pressure Regulator e.g. ~50psi. Please see the user guide for more information

The AppWeigh app shows a calculated weight for the steer axles based on the data transmitting from the AppWeigh scale sensor you install on your drive axles. This calculation provides a very close steer weight for most applications.

No. After the initial pairing, the sensor will go back into sleep mode until it is connected to pressure. If you would like to check that your sensor is still paired before installing it, you can wake it anytime by removing the sensor for 30 seconds, and reinserting it. It should then be visible by the app for the next two minutes before returning to sleep mode.

Yes, in Australia, we do! TRAIL-LINK has developed a spring/steel suspension  kit utilising the AppWeigh sensor to offer an unique solution for spring/steel suspension equipment. Please email [email protected], or call us on +61(0)3 9886 9006 for more information and a quote.

YES! You can add the AppWeigh scale sensor to any existing air suspension scale by simply tying into the same airline of that axle group already being monitored. This makes for a very quick and cost effective upgrade to any air suspension scale.

1. Clear app data and cache on your mobile

If that doesn’t work, then try

1. Remove the AppWeigh app and restart your device
2. Reinstall the AppWeigh app
3. Log into the app using your updated login credentials
4. Navigate to Support > Synchronize Server Data

Sometime, a sensor installed under a vehicle’s chassis can experience magnetic interference which can impede the sensors broadcast range. This can be resolved by extending the 6mm tube (from the sensor) and mounting the sensor in a suitable position.