Thermostatic bimetals
Brief description
Thermostatic bimetal is a laminated composite material that usually consists of two firmly joined metals or metal alloys with different rates of thermal expansion. In case of temperature changes the strips, disks or parts change their shape in a defined way. If this change in shape is suppressed, a setting force is obtained which can be used for a mechanical displacement. By combining it with cladding and intermediate layers certain properties such as electrical resistivity, corrosion resistance etc. can be deliberately influenced.
Applications
Thermostatic bimetals are established in a wide range of applications other than microelectronics. They are used to control or limit temperature-dependent variables by means of a relatively simple design. Their easy handling as well as their high reliability and low costs are the decisive advantages for their application in:
Electrical engineering
- Protective motor switches
- Automatic circuit breakers
- Automatic time switches
- Transformer safety switches
- Automatic staircase light switches
- Fluorescent lamp starters
- Control devices for irons
- Control devices for hot plates
- Control devices for toasters
- Control devices for ovens
- Thermostats for thermal storage heating stoves
- Inductive coil protections
- Door locking systems
Automotive industry
- Cigarette lighters
- Gasoline level indicators
- Cooling water controllers (fan control)
- Automatic starters
- Seat heating
- Mirror heating
- Brake-power controllers
Measurement technology
- Temperature compensation
- Temperature recorders
- Thermometers
- Clock and timer units
Heat technology
- Heating controllers
- Steam traps
- Exhaust gas valves
- Fire detectors
- Hot-water mixers
- Stove regulators
- Flame protection of gas burners
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