1. Temperature controllers and limiters are temperature hydraulic control systems that function during normal operation of the equipment.

Difference: A temperature controller limits the measured temperature within a certain range by disconnecting or connecting the measured power circuit. The working characteristics of a temperature controller can be simply described as 'dual operation'. For example, the temperature hydraulic control system in a household water heater is a temperature controller. The temperature controller is adjustable.

A limiter limits the measured temperature below or above a certain temperature point by disconnecting or connecting the measured power circuit. The working characteristics of a limiter can be simply described as 'single operation'. For example, the temperature hydraulic control system in an electric kettle is a limiter. The limiter is not adjustable.

2. Thermal isolation switch definition: A thermal isolation switch is a temperature hydraulic control system that functions during abnormal operation of the equipment. Indication: In the field of household appliances and electrical accessories, temperature hydraulic control systems are commonly referred to as temperature controllers.

3. Temperature controller: It can control the temperature between two specific temperatures. For example, if the temperature is controlled between 98-100 degrees, when the temperature is below 98 degrees, the equipment or device will heat up to raise its temperature; when the temperature exceeds 100 degrees, the equipment or device will stop heating or cooling to lower its temperature.

Practical application example: alternating high and low temperature box.

Limiter: It limits the temperature below a certain point. For example, if the temperature is limited to below 101 degrees, when the temperature exceeds 101 degrees, the equipment or device will stop heating or cooling to lower its temperature.

Practical application example: high temperature box. Temperature controllers and limiters can also be understood in this way. From the frequency of use, for example: an iron will have both a temperature controller and a limiter.

The temperature controller is the component that adjusts the temperature with a resistance band, primarily allowing the iron's temperature to reach a relatively stable state, and it is used frequently. The limiter, on the other hand, is a temperature fuse connected to it, which can stop the equipment in case of abnormal situations to prevent risks. Its frequency of use is very low.