My Sargent control panel has been registering an empty waste tank even though I know it isn't! I took out the sensor and it seems to only have a stub about 2cms long pivoting on the sensor body. Seems something is missing or dropped off. If I put this stub in line with the sensor body (simulating a full tank) the control panel says 100%. Does anyone know if replacements are available. The control panel will only register 0%, 50% or 100% so presumably a three position sensor. I appears to be a pivoting sensor so a bit like a ballcock in operation i.e a hinged float.
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