From sealed box to live readings in under an hour.

Setup steps

1. 1

   Mount the sensor to the top of the chamber

   Fix the ultrasonic sensor to the underside of the lid, pointed straight down at the water surface. The cone must be perpendicular — any tilt produces inaccurate readings. Leave the sensor face clear of debris and condensation.

2. 2

   Measure the width (inside dimension)

   Measure the inside width of the cistern — wall to wall, ignoring the wall thickness. Record in inches.

3. 3

   Measure the length (inside dimension)

   Measure the inside length — front to back, again ignoring the wall thickness. Record in inches.

4. 4

   Measure the height

   Measure from the bottom of the tank up to the bottom of the sensor — this is the maximum sensing range. Record in inches.

5. 5

   Measure the overflow height

   Measure from the bottom of the tank up to the bottom of the overflow outlet. This sets the practical full-tank threshold the system uses for percentage calculations.

6. 6

   Enter dimensions in the app

   Open the mobile app, select your newly paired device, and enter the four measurements. The system computes gallon capacity, current volume, and percent-full from those numbers.

Measurement diagram

Where to take each measurement.

All measurements should be taken from inside the cistern for accurate gallon calculations.

Installation tips