SOLAR THX  (approx 6" x 3.75" x 2")
Sensors are NTC sealed in tubular stainless steel case, standard cable length 4 metres.  Stainless Canistor is sealed and immersible, other probe types available on request.
Improved version now with mains indicator
Our high performance solar hot water differential temperature switch has precision fixed switch points; ideal for flat plate, serpentine, matrix and evacuated tube solar hot water heaters. Designed for fit and forget and delivering high reliability without the frills, it just keeps working ...
Solar THX hot water panel switch, no frills ... plenty of function
Click here to see sensors fitted to 15mm copper pipe