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. 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 and control the temperature of liquid in a tank, or in conjunction with air conditioning units to monitor the air in a room or system. The thermostat simply switches the system off or on whenever necessary so that a constant temperature can be maintained.

Types of Isolated Thermostatic Switches

Capillary Thermostat Switches

These switches consist of a sensor, capillary tube, diaphragms, a probe and an expansion medium. When the liquid heats up and expands, the temperature sensor is heated allowing for it to be converted into displacement in the diaphragm. 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 Switches

These consist of a strip of two different metals with different coefficients of linear expansion. The bimetallic strip acts as an electric contact breaker in an electric heating circuit. When the desired temperature is reached, the circuit is broken.

The strips of metal are bolted together. A bridge is then created in the electrical circuit and is connected to your heating system. The strip carries electricity through the circuit when the heating is on. When the strips get hot, both of the metals expand but one more so than the other. The hottest metal bends and opens the circuit. 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. When it cools, the metal goes back into the circuit and switches the heating back on as the electricity flow has been re-established. The metal strip takes a while to expand and contract so the heating is not constantly switching on and off every few seconds.

Applications of Thermostat Switches in New Zealand

Thermostat switches are unsung heroes in numerous New Zealand industries, ensuring precise temperature control for optimal performance and safety. From safeguarding delicate electronics to maintaining comfortable environments, these versatile devices are essential in diverse applications.

• Commercial Refrigeration: Thermostatic switches maintain consistent temperatures in refrigerators, freezers, and display cases, safeguarding perishable goods in supermarkets, restaurants, and food processing plants.
• HVAC Systems: Thermostat switches play a crucial role in heating, ventilation, and air conditioning (HVAC) systems, maintaining consistent temperatures in residential, commercial, and industrial settings. Adjustable bimetallic thermostat switches are commonly used in these systems.
• Industrial Processes: Bimetallic switches and other thermostatic switch types are used in manufacturing processes like plastics molding, metalworking, and chemical production, where precise temperature control is crucial for product quality and safety.
• Electronics and Appliances: Bimetal temperature switches and other temperature sensor switches are widely used in electronic devices, appliances, and machinery to prevent overheating and ensure safe operation.
• Automotive Industry: Thermostatic switches play a vital role in regulating engine temperature, battery charging, and cabin climate control in vehicles.
• Agriculture: Adjustable thermal switches act as safety cut-offs in appliances like ovens, water heaters, and electric motors, preventing overheating and potential hazards. help maintain optimal temperatures in greenhouses, livestock facilities, and storage areas, ensuring the well-being of crops and animals.
• Safety Systems: Temperature control switches are integrated into safety systems for fire detection, alarm activation, and equipment shutdown in case of overheating.

Shop High-Quality Thermostatic Switches for Optimal Temperature Control

is your trusted source for high-quality thermostatic switches, offering a wide range of adjustable thermal switches designed to meet the specific needs of New Zealand’s industries. Our thermostatic switches ensure precise temperature control and reliability, contributing to efficient operations and improved safety. Explore our selection today and find the perfect thermostat switch to optimise your temperature control systems.

Ordering & Delivery Information for New Zealand

RS offers fast delivery of thermostatic switches within New Zealand. For more details on delivery services and fees, please refer to our Delivery Information page.