The SRCPOOLML000 and SRCPOOLMLFPR Solarcontroller need two sensors: Solar sensor + poolwater sensor (equal). This is the right spare part. Price per one (1) pc. (this temperature sensor also fits the old control SRC2020SOLAR), HS-Code 85415000. The short 15cm extenders are made of a black PVC cable and are temperature resistant from -50 ° to + 105 ° C. The probes from 5m length correspond to IP67, have a waterproof molded sleeve made of VA and are provided with a red silicone lead and are therefore temperature resistant between -50 ° and + 200 ° C. Please select the necessary length!