WRE-430 WRE-431 WRE-432 WRE-422 WRE-423 assembly thermocouple, wire-wound resistors are made of constantan or nickel-chromium alloy resistance wire and wound on a ceramic skeleton. This resistance is divided into two types: fixed and variable. It is characterized by good thermal stability, high temperature resistance, small temperature coefficient, small error range, small current noise, and high power. Disadvantages: Relatively large volume, large distributed inductance and large distributed capacitance. It is suitable for high-power applications. The rated power is generally above 1 watt.
Carbon film potentiometer, its resistor body is made of a layer of carbon film coated on a horseshoe-shaped paper glue board. There are three types of linear, logarithmic, and exponential relations between its resistance change and the position of the intermediate contact. Carbon film potentiometers are large, small, miniature, and some together with the switch to form a switch potentiometer. There is also a straight-slip type carbon film potentiometer, which changes the resistance by sliding a sliding rod on the carbon film. . This potentiometer is easy to adjust.
A wire-wound potentiometer is made by winding a resistance wire on a ring-shaped skeleton. It is characterized by a small resistance value range and large power.