Tuesday, August 3, 2021
Bellows pressure gauge

Pressure Measurement by Pressure Gauges

Most of the conventional pressure gauges are of a mechanical type. These gauges embody on elastic element which deflects under the action of the applied pressure. This movement mechanically magnified and...
Classification of Manometers

Pressure Measurement By Manometers

Manometers is the device which is used for measuring the pressure at a point in a fluid by balancing the column of fluid by the same or another column of liquid. Simple...
Electrical Thermal Resistance

Electrical Thermal Resistance – theteche.com

The thermistor is a semiconductor device that has a negative temperature coefficient of resistance. Thermistors are non-metallic resistors, that is, semiconductors of ceramic materials. Basic Principle : The basic principle involved in thermistor...
Thermocouples

Thermocouples – Thermo Electric Effects

The most common method of temperature measurement uses the thermocouples. It is based on seeback effect. The thermocouple temperature measurement is based on creation of an electromotive force (e.m.f). Basic Principle : The...
Fluid Expansion Thermometer

Pressure Thermometer (Fluid Expansion Thermometer)

The pressure thermometer temperature measurement is based on fluid expansion. Fluid expansion thermometer represent one of the most economical, versatile, and widely used devices for industrial temperature measurement applications. Basic principle : The...
Disappearing filament type optical pyrometer

Optical Pyrometer Working Principle

This method refers to the identification of the temperature of a surface with the colour of the radiation emitted. The optical pyrometer compares the brightness of the image produced by the...
Infra Red Pyrometer

Infra Red Pyrometer – theteche.com

These pyrometers absorb only infra red pyrometer rays and measure temperature. At some high temperature, a surface starts emitting I-R rays in addition to visible light energy. These I-R rays are...
Total Radiation Pyrometer

Total Radiation Pyrometers – theteche.com

Thermal radiation pyrometers is electro magnetic radiation emitted by a body as a result of its temperature. Thermal radiation is in the wavelength region from about 0.1 to 100µm. The total...
Hot temperature check for thermometer

Calibration of Temperature Measuring Devices

For calibration of temperature measuring devices, a constant temperature source should be provided. The temperature source should as a minimum be stable enough to provide a constant temperature. (approximately ±0.2°F) for...
Filled systems thermometer

Filled Systems in Temperature Measurement

Filled systems temperature is by expansion of gases and liquids when it is heated and contraction of the same when it is cooled. Fig shows a filled systems. The pressure bulb contains...