Testing of the device.

So, the housing is assembled, the energy wire, load wire and the wire with the sensor go outside. Common incandescent lamps serve as the load – the heating element. Don’t be astonished. 95% of energy comes from the bulb as the heat and only 5% is the light.

The bulb is a perfect and cheap heater with small thermal inertia. Fasten the receptacle to the load wire, put the sensor on the noncombustible surface, put the lamp on the top. Switch on. Select the temperature regime by the adjustable resistor – approximately. Now let it work!