Teknic is the manufacturer of Weather-Proof Capillary Tube Thermostat. Teknic is an ISO 9001: 2000 certified company. The Weather-Proof Capillary Tube Thermostat is a mechanical change-over controller housed in a polyester enclosure. Heaters, fans, motors and other equipment are energized and de-energized when temperatures fall below or rise above certain limits. The Weather-Proof Capillary Tube Thermostat can also be used to control the temperature in air, liquids and on various surfaces.