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 radiation emitted by a blackbody is...
Tag - Mechanical
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 a...
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 thermometer fluid. This is connected to a...
Laser Doppler Anemometer enables the measurement of instantaneous velocity of a gas or a liquid flowing in a glass walled channel. It offers the non-disturbance advantages of optical methods while affording a very precise...
A float technique is a small object lighter than water and thus capable of floating on the water surface. It is usually made of wood or other suitable material. Floats are used to measure the velocity of flow of water in rivers...
A current meter is used to measure the velocity of flow in the channel. It consists of a wheel or revolving element on which the conical buckets of V-shaped vanes are fixed. So, the current meters are classified on the basis of...
Tactile pressure sensors are used to detect the pressure distribution between a sensor and a target. They are often used on the robot grippers or flat tactile arrays to identify whether the finger is in touch with the target...
A piezoelectric sensor is a device that uses the piezoelectric effect to measure pressure, acceleration, strain or force. When pressure, force or acceleration is applied to piezoelectric materials such as quartz crystal, PZT...
The bourdon tube pressure sensor instrument is one of the oldest pressure sensing instruments in use today. It is widely used in applications where inexpensive static pressure measurements are needed. The bourdon tube consists of...
The bellows pressure sensor is a one-piece, collapsible, seamless metallic unit that has deep folds formed from very thin-walled tubing. It looks like a stake of capsules. It is more sensitive than the diaphragm and capsule...