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...
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 – 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 – 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...
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...
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 – 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 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...
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 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...
