This fuel meter allows you to read the status of your fuel remaining in the tank. Works with 12V and 24V. Diameter: 52 mm. Available for 0-190 ohms and 240-33 ohms. This measuring rod must be connected to a vertical float. Make sure you have selected the same ampere number between float and dipstick. Ref. : 36027 - Fuel Meter 12/24V - 0-190ohm Compatible with: Vertical Float for Water / Fuel Tank - 0-190ohm Ref. 36028 – Fuel Meter 12/24 V – 33 – 240 Ohm Compatible with: Vertical Float for Water / Fuel Tank 33 – 240 Ohm