It is thermostat switch that can be used to control the heating/cooling temperature of an object with temperature sensor included. The module is operated by the 12VDC connected at the input terminals. it has got two output ports where you can connect the equipment to heat or cool the test system.

Automatic over-temperature alarm

with Relay output

High Control precision 0.1 centigrade

Mini sized temperature controller.

clear LED display for better readability.

Wide temperature measuring range.

Dual heating and cooling control.

Operating voltage : 12V DC  (ac and 24v variance also available, separately)

Uses:

Domestic freezer, water tanks, refrigerator, industrial chiller, steamer, industrial equipment, and another temperature-controlled system.

Medical equipment, amusement machines, vehicles, safety equipment, and installations subject to separate industry or government regulations

Systems, machines, and equipment that could present a risk to life or property

Outdoor use uses involving potential chemical contamination or electrical interference

Nuclear energy control systems, combustion systems, railroad systems, aviation system