Contact type temperature sensor and the measured object detecting portion has a good touch , also known as a thermometer

In recent years, the continuous development of science and technology , China's science and technology into the automation, digitization of the new field , which is used to place the temperature sensor a lot more . With the low-temperature technology in the defense engineering , space technology, metallurgy, electronics, food , pharmaceutical and petrochemical sectors and the wide application of superconducting technology research, measuring temperatures below 120K cryogenic thermometers have been developed , such as low temperature gas thermometer , steam pressure thermometer, acoustic thermometer, paramagnetic salt thermometer , quantum thermometer , low thermal resistance and low-temperature thermocouple and so on. Low temperature thermometer temperature sensing element requires small size , high accuracy , repeatability and stability. Porous silica glass using carburizing carburizing sintered glass thermal resistance thermometer is a temperature sensing element , for measuring the range of 1.6 ~ 300K temperature. Conductors of two different materials , such as connected to each other at a certain point , the connection point of heating in their unheated parts of the potential difference occurs . Pressure switch the value of this potential difference is not heated and the temperature of the parts of the measuring point , and the material on the two conductors . This phenomenon can be in a wide temperature range occurs , if the potential difference accurately measure , measure the unheated parts of the ambient temperature , heat spots can accurately know the temperature. Since it must have two conductors of different materials , so called " thermocouple ." Thermocouples made ​​of different materials used in different temperature ranges , they are also different sensitivity . The sensitivity of the thermocouple hot spot temperature is added 1 ℃ , the output variation of the potential difference . For most metal thermocouples supporting material is concerned, this value is about 5 to 40 microvolts / ℃ between . Crankshaft Positioning Sensor has its own advantages and disadvantages , which sensitivity is relatively low, the interference signal susceptible to environmental impact, but also susceptible to temperature drift of the preamplifier , therefore not suitable for measuring small changes in temperature. Since the thermocouple temperature sensor independent of the thickness of the material sensitivity , a very thin material can be made ​​of a temperature sensor . Also due to the production of metal thermocouple material has good ductility , this subtle temperature measuring element has a high response rate, can be measured rapidly changing process . Temperature sensor is a wide variety of the most commonly used variety of Cooling Temperature Sensor as a modern form of the temperature sensor was very small, so it is more widely used in various fields of production practices , but also for our life to provide a myriad of convenience and functionality . There are four main types of temperature sensors : thermocouples , thermistors , resistance temperature detector (RTD) and IC temperature sensor. IC temperature sensor also includes analog and digital outputs of two types. Contact type temperature sensor and the measured object detecting portion has a good touch , also known as a thermometer .