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)
According to different temperature coefficients, thermistor can be divided into two types: positive temperature coefficient thermistor (PTC thermistor) and negative temperature coefficient thermistor ( NTC thermistor ). Thermistor has been widely used for temperature control, temperature detection and temperature compensation of household electric appliances. 1.Liquid level control Put two NTC thermistors on safe places of vessel height and low liquid level, and apply thermal current. The surfac...(more)
In working process, many thermoelectric coolers (TECs) refer to temperature increasing and declining periodically. Sometimes, this cycle can occur in the very wide temperature range. Although there is no clear boundary between cycle and non-cycle working conditions, in general case, if there are working conditions that can keep temperature regularly increasing and declining continuously, which is called thermo-cold cycling. These working conditions of the cycle generally trend to be controlled b...(more)
As thermoelectric cooler (TEC) is built on the basis of solid state, TEC has very high reliability. In most conditions of practical applications, TEC can provide a relatively long service lifetime. Currently, in many specific cases, the continuous work time of TEC has been over 20 years and is longer than other relative devices. However, it is still difficult to obtain specific reliability of TEC because failure and application environment are closely related. In some steady cooling conditions, ...(more)
