End-face resistance temperature detectors (RTDs) are made of specially treated wires (copper or platinum wires) wound tightly around the front end of a thermometer. Compared to general axial RTDs, they can more accurately and quickly reflect the actual temperature of the measured end face. They are manufactured using various methods and come in a variety of types, suitable for temperature measurement of power plant turbine and motor bearings or other machine surfaces. They are also a commonly used temperature measuring instrument, based on the characteristic that the resistance of a metallic conductor changes with temperature, and are widely used in industry, power, electronics, and other fields.
The end-face resistance temperature detector (RTD) consists of a protective tube, mounting bolts, locking sleeve, spring, and thermocouple leads. It features a flexible extension lead that can be bent freely, and boasts a short thermal response time and ease of use. The sensing element is made of specially treated resistance wire wound tightly against the thermometer's end face. Compared to general axial RTDs, it reflects the actual temperature of the measured end face more accurately and quickly, making it suitable for measuring the end-face temperature of bearings and other machine components.
A resistance temperature detector (RTD) is a temperature sensor that converts temperature into resistance based on the principle that its resistance changes with temperature. Temperature transmitters, temperature controllers, PLC modules, and other temperature measuring devices obtain the resistance value by applying a known excitation current to the RTD and measuring the voltage across its terminals. This resistance value is then converted back into a temperature value, thus achieving temperature measurement. As a primary element that converts temperature changes into resistance changes, the resistance signal typically needs to be transmitted to a computer control device or other primary instrument via leads. Installed in the production site, at a certain distance from the control room, the RTD's leads can significantly affect the measurement results.
