A glass encapsulated thermistor mainly plays a role of temperature compensation. There are some kinds of packaging materials, such as epoxy resin, SMD, glass and so on. The glass encapsulative has high temperature resistance and moisture resistance. However, comparing with some other packaging forms, its responding speed is a little slow, around ten senconds. Application range 1. Temperature control and detection forhousehold appliances, such as air conditionor, microwave oven, electric fan and ...(more)
Thermistor is a kind of sensitive elements, which can be divided in two types, PTC thermistor and NTC thermistor , according to different temperature coefficients. The typical characteristics of thermistor are that at different temperatures, it can show different resistance values. With increase of temperature, the resistance of PTC can increase and the resistance of NTC can decline. PTC and NTC both belong to semiconductor devices. PTC came out in 1950 and then in 1954, PTC started to use bariu...(more)
Since the TEC module structure is constructed in a solid state, its common to regard it as having high reliability. In most applications, TECs can provide long term fault-free services. At present, in many practical applications, the service life of TECs exceeds 20 years, longer than other relative devices. However, failure rate is closely related to the application environment, so its difficult to achieve detailed reliability of TEC modules. For some stable cooling applications, a stable and co...(more)
To select a proper TEC module in a specified application, we need to evaluate the whole system, including electronics, mechanics and other requirements. Before selecting thermoelectric cooler, the designer needs to answer the following questions: 1. Whats the target temperature that the object is expected to keep? 2. How much heat will be transferred from the object. 3. Is thermal response time important for you? If so, how long will the object temperature change after DC power is on? 4. Whats t...(more)
The sensor precision refers to the reliability of measurement results, and the smaller the error is, the higher the precision is. The accuracy of the sensor is expressed by the percentage of the rate of the maximum basic error and the full range. For NTC thermistor , two common precision parameters are allowable deviations of temperature and B value: common product precision is gernerally 0.2℃; integrated temperature sensor precision can be up to 0.2℃; body temperature sensor precision is ge...(more)
1.Epoxy resin sealing thermistor All polymer compounds that have epoxy groups are collectively known as epoxy resin. After curing, epoxy resin has good physical and chemical properties and it has excellent bonging strength for the surfaces of metal and nonmetal materials. Whats more, it also has some advantages of good dielectric properties, small shrinkage rate, good product size stability, high hardness and good flexibility. This sealing thermistor is a kind of advanced thermistors. Currently,...(more)
7. Temperature control of food and medicine During transportation, food and medicine industries use temperature control to guarantee product quality. In order to prevent partial or total loss of the effectiveness of drugs, drugs need accurate temperature and humidity control. The temperature sensor is continuously managing the transportation condition in the transportation process. 8. Thermistor using in hospital People usually measure body temperature, which is regarded as an early warning of s...(more)
4. Temperature control In the electromechanical protection and control, critical point thermistor is usually connected to relay control loop in series. When a certain device encounters a sudden failure, overload will come out and it can result in temperature increasing. If the thermistor reaches the critical point resistance value and then falls down suddenly, the relay current will be over action current rating and then the relay will start work to cut off and protect the circuit. 5. Temperatur...(more)
