Langir Electric Co.,Ltd.

Capillary Thermostat | Bimetal Thermostat | Snap-Action Thermostat

Check Method


Thermal Protectors

  • Test on Rated Off Temperature
Place a thermal protector in a test chamber for test. The air flow rate in the test chamber should be no lower than 200m/min. (The temperature uniformity at temperature measuring area must be kept within the range of ±0.5℃.) Take a thermocouple or a thermometer for measuring and it should be placed on the sample or be kept as close as it could to the sample. Raise the air temperature of test chamber and heat up when it is 10K lower than nominal operating temperature at a heating rate lower than 1K/min until the thermal protector operates. The temperature measured should accord with prescribed GB standard. The on-off state is indicated by indicator light or other means. Current through the thermal protector should not exceed 0.01A.
  • Test on Reset Temperature
Apply the method mentioned in article 1 to test reset temperature. Decrease the air temperature of the test chamber and lower the temperature when it is about 10K higher than the ceiling reset temperature at a cooling rate lower than 0.5K/min until the thermal protector resets. The temperature measured should accord with prescribed GB standard.
  • Test on Service Life
Connect a thermal protector in an AC circuit of 50 Hz, with rated voltage being 250V and power factor COSΦ being 0.75~0.8. The circuit carries rated current with a current tolerance of ±5%. Frequency of operation (connect-break-connect time) is no shorter than 13min. The cycle rate of the test depends on the control of surrounding air medium temperature. After 4000 cycles, the variation of operating temperature should be within ±5℃ or ±5% of initial value(choose the higher value of the two). There should be no weld fusion of the contact. Continue the test for 2000 times and there should be no perpetual damage on the operating performance of the thermal protector.
Recommend Product

Capillary ThermostatCapillary Thermostat The volume of the material in the temperature sensing part of temperature controller will inflate or deflate when the temperature of the controlled object varies, which causes the film box that is connected to the temperature sensing part inflating or deflating, then drives the switch on or off through a leverage function to keep a constant temperature. WK Series Liquid Inflated Temperature Controller is characterized by accurate temperature control, reliable, small on/off temperatures difference, a wide range of temperature control and large over loaded current etc. Snap-Action ThermostatSnap-Action ThermostatKSD series is a Small-sized bimetal thermostat with a metal cap,which belongs to thermal relays family .The main principle is that one function of bimetal discs is snap action under the change of sensing temperature, The snap action of disc push the action of the contacts through the inside structure, then caused on or off the circuit finally,It's can be used different insulating materials to satisfy the customers' request ,the main insulator is bakelite, PPS and ceramics etc. It is a small type temperature controller. And it has fixed temperature property, don't need to adjust,reliable action, long life and little wireless interference.
Bimetal ThermostatBimetal Thermostat Applicable to be used as the function of temperature adjustment and control for the warm-air machine, water heater, milk-heater, electric cooker, electric iron, electric heater.
Designed temperature: 0~90℃
Temp. control range: 6~30℃ 6-35℃ 5-55℃ 0-70℃ 5-75℃
Voltage and current: AC250V 16A
Thermal ProtectorThermal Protector This thermostat is rectangle,small size,regular act-temperature,the action rapid,reliable,unelectric-arc,and longevity. It can install at narrow position or set in some products.
The Series use the bimetal as the component of feel-temperature, when the temperature change, the bimetal change the shape so the contact-point act quickly, thereby the electric circuit break off.
Kettle ThermostatKettle ThermostatSuitable for temperature control of electric kettle
The bimetal piece has high quality and acumen
The insulated plastic material could be ensured high temperature Steam automatic skip protection and dry burn prevent protection for safer use Reasonable configuration and easy assemble, wide range temperature, long life.
Twinkling ThermostatTwinkling ThermostatTwinkling thermostat can be installes and fixed on the heating body or shelf through rivets or aluminum board.Through conduction and radiation ,it can sense the temperature.The installing position is free,and it has fine temperature controlling result and little magnetic interference.The compensation temperature controller can control the temperature and minish the fluctuation of temperature through absorbing self heat. It is widely used for biscuit machine, stove,rice cooker,fried pan,roasted pan,electric iron,heating machin etc.
Capillary Thermostat, Bimetal Thermostat, Kettle Thermostat, Thermal Protector, Twinkling Thermostat, Snap Action Thermostat
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