Author name: Abhay

A level transducer is a device that produces an electric signal with respect to a liquid level. Level transducers are classified based on following measurement methods Direct and indirect level measurements. Continuous and discrete level measurements. In direct method of measurement, the liquid level is converted directly to electrical signal. This can be done with […]

A pressure transducer is a device that converts pressure into an analog electrical signal. Measuring Pressure Pressure is measured in three forms. Absolute pressure is a pressure that is relative to the zero pressure in a vacuum. Gage pressure is the pressure relative to atmospheric pressure. Differential pressure is the difference in pressure at two

When the temperatures being measured are very high, it is impossible to have physical contact with the medium to be measured. Temperature sensors that work on radiation methods and hence require no physical contact with the radiating system are called Radiation Pyrometers. Construction of Radiation Pyrometer The radiation pyrometer have three basic components The optical

A thermocouple is an active transducer that measures temperature. It works on the principle of see back effect. They are extensively used for temperature measurement in industrial applications. Thermocouple Construction and Types A thermocouple consists of two different types of metals joined together at one end (hot junction) and terminated at another end (cold junction).

The Thermistor or simply Thermally Sensitive Resistor is a temperature sensor that works on the principle of varying resistance with temperature. They are made of semiconducting materials. The circuit symbol of the thermistor is shown in the figure. Construction of Thermistor A thermistor is made of oxides of metals such as Nickel, Manganese, Cobalt, Copper,