• A N Instruments Private Limited

Temperature Gauges/Dial Thermometers

A N Instruments offers temperature gauges/dial thermometers. Elastic pressure gauges indicate the relative difference between the pressure of the medium and the surrounding atmosphere. The construction is simple and robust; no additional source of energy is needed for its operation. Among the existing types of sensing/elastic elements, the most commonly used are temperature gauges/dial thermometers. Temperature reflects the momentous thermal condition of a homogenous material. Measurement of temperature normally requires close, direct contact between the material and the sensor in such a manner that the sensor responds quickly to the temperature of the material. The two types of dial thermometers manufactured by the company are bi-metal thermometers and mercury-in-steel/gas filled thermometers. The bi-metallic element consists of two strips of different metals, with different thermal expansion coefficients, inseparably joined together. This strip is spirally or helically wound with one end fixed to the body of the thermometer, and the other attached to the axis of a pointer. Measurement of temperature is made with the bi-metallic system inside the temperature sensor. Temperature variation influences the bi-metallic strip such as to rotate the pointer; this rotation is indicated on a dial.