![]() ![]() Once the circuit is open the electricity switches off and the heating cuts out.Once the heating is off, the room cools down which in turn cools down the strip of metal and allows it to go back to its original shape. The hottest metal bends and opens the circuit. When the strips get hot, both of the metals expand but one more so than the other. The strip carries electricity through the circuit when the heating is on. A bridge is then created in the electrical circuit and is connected to your heating system. When the desired temperature is reached, the circuit is broken.The strips of metal are bolted together. The bimetallic strip acts as an electric contact breaker in an electric heating circuit. ![]() The contacts within the closed circuit system can be opened or closed by this displacement due to pressure.Due to their accuracy and easy installation, they are widely used to control air and water temperatures and are suitable for use in storage heaters, hot tanks and boilers to control hot water.Bimetallic Thermostat SwitchesThese consist of a strip of two different metals with different coefficients of linear expansion. When the liquid heats up and expands, the temperature sensor is heated allowing for it to be converted into displacement in the diaphragm. The thermostat simply switches the system off or on whenever necessary so that a constant temperature can be maintained.Capillary Thermostat SwitchesThese consist of a sensor, capillary tube, diaphragms, a probe and an expansion medium. The two main types are capillary and bimetallic thermostats.RS offer a range of thermostat switches such as enclosure thermostats, mechanical HVAC thermostats, digital and programmable HVAC thermostats, digital and smart thermostats with Wi-Fi.What Does a Thermostatic Switch Do?Thermostats regulate the temperature of liquid in a tank, or in conjuction with air conditioning units to monitor the air in a room or system. If the sensor sends wrong information to the engine control unit, error messages are produced, with the risk of fuel injection regulation problems.įacet thermo switch and temperature sensor typesįacet technology keeps pace with the evolution of thermal management, offering a wide range of solutions: from simple disc switches for electrical-mechanical fan control to the most sophisticated temperature sensors fitted with thermistors, which send temperature information and alarm signals to the engine control unit.Thermostatic Switches Thermostat switches are used in temperature control systems to regulate air or liquids and can be used in both commercial and domestic applications. If the electrical circuit remains closed, the fan continues to run, causing loss of power. If the disc is stuck with the electrical circuit open, the switch cannot activate the electric fan, causing overheating of the liquid with the possibility of serious damage to the engine. ![]() Loss of elasticity in the connector gaskets Loss of air-tight seal, with penetration of water or moisture into the switch Once the exchange temperature is reached, the heat-sensitive disc “snaps”, thus closing the electric circuit. The disc changes shape as the temperature varies. Thermo switches are activated by a concave or convex bimetal disc, which opens and closes contacts located inside them, and are divided into two categories: They can have up to four terminals and be installed on the radiator, the cooling system tubes or the thermostat, so that the coolant flows across the sensing element (bimetal disc or thermistor). This series of devices prevent the engine from overheating by activating radiator cooling fans, measuring the coolant temperature and controlling the level gauges and warning lights on the engine control unit. ![]()
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