Slight glass level gauge: A glass of sight or a water gage is a transparent tube through which a tank or boiler operator can observe the level of liquid contained in it. It is positioned parallel to the vessel along the elevation over which the level is to be indicated and mounted with appropriate fittings …
Piston-type differential pressure gauges are available with one or two hermetically sealed leaf switches. The switches are adjustable within a defined percentage of the full scale of the meter and are available in SPDT and SPST, normally open or normally closed configurations for various load / power classifications. Operation principle: The differential pressure p1 and …
Micro-Electro-Mechanical Systems, or MEMS, are technologies that are in the most common form that can be defined as miniature mechanical and electro-mechanical elements (i.e. devices and structures) made using microfabrication techniques. the types of MEMS devices can vary from relatively simple structures having no moving elements, electromechanical systems to very complex with multiple moving elements …
McLeod Gauge is a vacuum pressure gauge suitable for measuring pressure down to about 10-3 Pa. It works by compressing the volume of the gas by a known high factor and measuring the higher pressure; the original pressure of the gas is then found from Boyle’s law. Principle of Mcleod gauge, Boyle’s laws: Boyle’s law states …
Pressure Transmitters Pressure is one of the most common properties to detect. We frequently sense differential pressure to determine fluid flow, liquid level, and equipment performance. Pressure transmitters can be designed to measure absolute pressure or gauge pressure. All sensors will sense pressure above atmospheric. Most, but not all, will measure pressure below atmospheric (a partial …
What are manifold gauges? A manifold gauge is chamber device that is used to control the flows of pressure or gases. The manifold gauge set and interpret the pressures of the air-conditioning system as it operates. These pressures tell the technician if the system is operating correctly or if there is a problem with …
Introduction The bellow type gauges are used for the measurement of absolute pressure. They are more sensitive than bourdon gauges. It may be used for measuring pressures up to 40 mm Hg. Construction The bellows are made up of an alloy with high strength and ductility. It should have very little hysteresis effect. Commonly brass …
Introduction For electronic pressure measurement a sensor is required to detect the pressure and/or its change, and to convert it accurately and repeatably into an electrical signal utilising a physical operating principle. The electrical signal is then a measure of the magnitude of the applied pressure or change in pressure. Four key measuring principles and …
Introduction A simple way to mitigate the effects of pulsation on a manometer is to fill the inside of the manometer with a viscous liquid such as glycerin or oil. The inherent friction of this filling fluid has a “shock absorber” quality that dampens the oscillating movement of the measuring mechanism and helps protect against …
Introduction For the purposes of this section, we will define high-pressure instruments as devices that are capable of measuring pressures in excess of 10,000 to 20,000 PSIG (700 to 1,400 bars) One might group these sensors by other characteristics, such as: 1. Mechanical, such as pressure repeaters, helical bourdon tubes, or dead weight testers 2. …