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Introduction All the targets radiate energy in the infrared spectrum. The hotter the target, the more energy it radiates. Very hot targets radiate in both the visible and infrared spectrum. As the objectives cool, they no longer shine but continue to radiate….
Introduction A pyrometer, or radiation thermometer, is a non-contact instrument that detects the temperature of an object’s surface by measuring the temperature of the electromagnetic radiation (infrared or visible) emitted by the object. The pyrometer is any non-conductive device that intercepts and…
Barometric type of temperature measurement relies on the basis of pressure measurement. To suit the differing applications, the temperature sensitive bulb is available in many different shapes and sizes. The temperature that is displayed is a result of the pressure in the filled system….
INTRODUCTION The liquid filled temperature gauges are most often used temperature gauges in industries. In this type liquid is filled in the metal tube. most generally used liquids are mercury and alcohol. OPERATION PRINCIPLE OF LIQUID FILLED TEMPERATURE GAUGES: Liquid filled temperature gauges…
Why to use Pyrometers or non-contacting type? Non-contacting temperature meter or Pyrometers are used to measure temperature without any physical contact with temperature body. In many industrial application with a higher temperature range, where many other temperature meters and human can’t reach…
Resistance Temperature Detectors (RTD) are temperature measuring transducers used in industrial applications. RTDs are simple in construction with higher accuracy and repeatability and which are used in the applications below 600°C. Principle: As the name suggests the RTDs are temperature sensitive resistors….
A thermistor is a semiconductor device formed from metal oxides. thermistors are used in many applications requiring information about process equipment for alarming and indication purposes. Principle: The principle of temperature measurement with a thermistor is that its resistance changes with temperature. Most…
What is thermocouple? A thermocouple is an active transducer which directly converts thermal energy into electrical energy. It is a simple device made by joining to dissimilar metals or semiconductor forming a junction. It produces a voltage when the temperature at the junction…
IN industries temperature is a major physical quantity . there are different methods of temperature measurement in industries. The different methods of temperature measurement are: 1. Mechanical 2. Electrical. 1.Mechanical methods: Mercury in…
Introduction A thermocouple is a sensor used to convert temperature into an electric signal. It consists of 2 dissimilar metals joined together to form junctions. In this session we are going to discuss about Thermocouple transmitter calibration Working principle Seebeck effect: the emf…