Tank level probe with the same function as the Lev'O+ LPG Senior, for a smaller tank fitting. ATEX Zone 1 when used with Toran'O. The probe fits a Rochester Junior dial gauge on horizontal LPG tanks and uses a Hall-effect transmitter to convert the gauge pointer position into a voltage proportional to the liquid volume in the tank, which the Toran'O device (not supplied) sends over LoRaWAN.
Specifications as published by Watteco.