Basic description of the AXsensor’s measurement of liquid levels

The liquid level monitor AXsensor uses an acoustic pulse with low frequency and extremely low power consumption. The AXsensor is powered by batteries with a running time of 3-10 years. All electronics are outside the tank and the AXsensor transmits an acoustic pulse, through a measuring tube (waveguide) to the surface of the liquid, which measures the time calibrated for temperature. The AXsensor has a built-in antenna that communicates using the Sigfox (LPWAN) network and is certified according to Sigfox Ready.

Most important benefits

  • Smart, simple and robust
  • Reliable, maintenance-free and cost-effective
  • Easy installation, wireless connection without cable installation – plug’n’play
  • IoT (Internet of Things) – Cloud service that can be read on mobile, tablet or computer
  • Measures all the way up in the tube/tank roof (no dead band)
  • Reliable measurement even in foam and turbulence. Nor is it disturbed by physical obstacles (stag / tubes / beams)
  • The length of the measuring tube is completely adaptable
  • No need for calibration during installation

Information sheet

Download the AXsensor Infosheet.

Operation range

0-3 metres. Measures from 0 – 100 %, No dead band

Measuring accuracy

Resolution 0,1 mm
Accuracy +/- 5 mm


110 x 80 x 25mm


Sigfox – LPWAN (Low Power Wide Area Network)
see further Sigfox website for current and planned coverage

Supply voltage

AA Battery – 3,6 V 

Used Materials

Housing in ABS/PC
Measuring pipe: PE or any other material that is suitable

Electrical protection

Not necessary in battery driven devices

Standard connection of sensor housing (adaptions)

G ¾ inch (R20) BSP (Whitworth)

Temperature Range

-30 – + 70 C