RTD temperature is increased with increasing temperature resistance value based on the characteristics of metal conductors for temperature measurement. Most of the thermal resistance from the pure metal material, currently the most widely used platinum and copper, in addition, have begun to use nickel, manganese and rhodium and other materials RTD. RTD sensor is primarily a function of the temperature change by a resistance value of the characteristic to measure temperature and temperature-related parameter. The temperature is relatively high detection accuracy of the occasion, this sensor is more appropriate. More extensive thermal resistance materials as platinum, copper, nickel and other sensors, which have a large temperature coefficient of resistance, good linearity, stability, wide temperature range, easy processing characteristics. For measuring the temperature within the range -200 ℃ ~ + 500 ℃ of. Laser high directivity, high color and high brightness and other characteristics can be achieved without contact distance measurement. Laser sensors commonly used in length (ZLS-Px), distance (LDM4x), vibration (ZLDS10X), speed (LDM30x), orientation and other physical measurement sensor classification, can be used for detection and monitoring of atmospheric pollutants. Hall sensor is based on the Hall effect sensor made of a magnetic field sensor types, widely used in industrial automation technology, detection technology and information processing. Hall effect is the basic method of Semiconductor Materials. Hall effect experimentally determined by Hall coefficient, important parameters can be determined conductivity type semiconductor material, the carrier concentration and the carrier mobility and the like. Hall sensors into linear Hall sensor and Hall sensor switch two kinds. A linear Hall sensor consists of a Hall element, linear amplifier and emitter follower composition, it outputs analog. 2, the switching regulator by the Hall sensor, the Hall element, a differential amplifier, Schmitt trigger and output stage, which outputs digital. Sensors prices, sensors, sensor Xinfeng Xinfeng provided by Xinxiang purification technology Limited. Xinxiang City Xinfeng purification Sensing Technology Co., Ltd. (www.xfcgq.com) strong, credible, Xinxiang in Henan sensor industry has accumulated a large number of loyal customers. The company better work attitude and continuous improvement will lead Xinfeng innovative ideas into the brilliant and you work for a better future!