First make sure that the bottom of your cylinder is clean where you will be placing the sensor. Remove all dust, grease etc. Rust and uneven surfaces might interfere and might make the cylinder unreadable.
Press the "Sync" bottom on the Gas Level Sensor and attach it to the bottom of your gas cylinder with the rubber pad as close as possible to the middle of the bottom of the cylinder. Make sure your cylinder is level. If the cylinder is sitting at an angle, the surface of the liquid will also be at an angle, sometimes causing incorrect readings. The sensor must be located properly. The black rubber contact pad should be placed on centre of the cylinder bottom. If readings appear incorrect or erratic, repositioning of the sensor can solve the problem. The black rubber contact pad of the sensor should also be kept clean. The bottom of your cylinder will need adequate clearance from the surface it is resting on. If your cylinder sits directly on the ground or other flat surfaces, or if your tank sits on a caravan or trailer cylinder tray that has no cut outs, then you will need to add the 3 Rubber Spacers to the bottom foot ring of your cylinder to provide adequate space for the sensor. This also improves the Bluetooth Range of the product. If the cylinder is moving or vibrating, it will degrade the quality of the signal. Movement of the cylinder can cause the liquid to slosh, sometimes causing erratic readings. Readings should go back to normal after a few minutes. It is typical to see level change with changing temperature. This is a characteristic of propane as it boils into gas.
The nGauge 4x4 Gas Level Sensor has strong magnets to hold the sensor in place when travelling. Although we do recommend taking additional steps to secure the unit when travelling on very rough and corrugated roads.
To replace the battery, use a small screwdriver to lift the lid which is snapped in place. Carefully replace the battery and snap the lid back in place. Pay attention not to pinch any wires and ensure the seals are properly seated.
Certain cylinders may be more difficult to read and might have more debris (heavies) inside, along with layers of paint and rust added over the years. If you do struggle to get a good reading, please try the sensor on a different cylinder or brand.