The differential thermostat is a device controlling circulation pump which takes care of transferring the heat between a heat source (solar collector) and a boiler. The device has LED display showing the temperatures of both the heat source and heat recipient.

The controlling algorithm gives the user one parameter - the difference in temperatures between the heat source and the boiler according to which the circulation pump should be turned on or off. Besides this setting the devices has emergency regimes to protect system overheat (above 100ºC) and fluid freezing (below 2ºC).

Technical Data
Mains Voltage	230V, 50Hz
Relay output	250V, 10A
Differential difference interval	2 ºC ÷ 40ºC
Temperature sensors temperature	-10ºC ÷ 100ºC
Deviation	±1ºC
Working temperature	-10ºC ÷ 65ºC
Warranty	24 M