The NTC thermistor is a thermistor with negative temperature coefficient and it has high performance ceramics near theoretical density structure by using a single high purity material. Therefore, at the same time with realizing miniaturization, it also has the small fluctuation characteristics of resistance value and temperature and fast response characteristic, which can take the high sensitivity and high accuracy detection.(more)

There are a lot of people worried about heating element working in the airtight space, and the working heating element produces heat continuously, making temperature of the airtight space increase, and shortening the lifetime of the element itself even damaged completely. Today I will introduce a cooling device (ATECA105) to help you solve this problem.(more)

Thermoelectric cooler (TEC) is based on “Peltier effect”, which can both cool and heat. According to changing the polarity of direct current, the same TEC can realize cooling or heating. This effect is achieved by the principle of thermoelectric. In principle, TEC just plays a role of a heat transfer tool.(more)

Semiconductor laser is also known as laser diode (LD). As early as in 1953, in an unpublished manuscript, John Von Neumann was the first to discuss the possibility of stimulated emission produced in the semiconductor. He considered that stimulated emission can be achieved through the injection of minority carriers to the PN junction, and the transition rates between two Brillouin zones were calculated. After summing up this theory, Bardeen believed that through a variety of methods disturbing conduction band electrons and equilibrium concentration, it can cause the non-equilibrium minority carrier recombination and produce a photon, which the radiative recombination rate can be the same with amplifiers and it can be improved by the electromagnetic radiation at the same frequency. It should be said to be the earliest concept of laser.(more)

There are huge differences between laser and ordinary light, and laser owns the following features: 1.The laser launched is monochromatic, and it has a specific wavelength light which would be a specific color. What’s more, its wavelength depends on the power released by e. when it returns back to low power orbit.(more)

Thermoelectric coolers (TECs) are built based on Peltier effect, which can both heat and cool depending on the direction of input DC current. Because of having no noise, no vibration, no refrigerant, light weight, compact size and some other advantages, TEC has been widely used for cooling certain components in electronic devices and radio communication equipment.(more)

During the productive process, by controlling the material composition, sintering atmosphere, sintering temperature and the state of structure, we can control resistance under the same temperature, and also be able to control the value change when the temperature changes. That is the process, and this is very important!(more)

As semiconductor laser has the advantages of small size, simple structure, high electro-optical efficiency, long service life, easy modulation and low price, so it has a wide range of applications.(more)

Thermoelectric coolers are operated by the Peltier effect which also goes by the more general name thermoelectric effect. The device has two sides, and when DC current flows through the device, it brings heat from one side to the other, so that one side gets cooler while the other gets hotter. The “hot” side is attached to a heat sink so that it remains at ambient temperature, while the cool side goes below room temperature. In some applications, multiple coolers can be cascaded together for lower temperature. The cooling power of the Peltier elements is regulated by TEC controllers in relation to the actual measured temperature at the object. Our TEC family controllers are the ideal complement to our Laser drivers.(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.(more)