How a pressure gauge works - Jyinstruments.com
All pressure gauges have an element that changes some property when subjected to pressure. These changes are manifested on a scale or screen calibrated directly in the corresponding pressure units. The needle indicates the pressure inside the circuit.
The image shows 2 scales, the upper one marks the bars, while the lower one measures the pressure in psi. Colors are normally used on the scale to identify safety fringes, for example, the color red indicates a pressure above the safe operating margin for that system.
The most important thing about a manometer's performance is its accuracy or precision . Accuracy is defined as the maximum difference (error) between the true value and the value indicated by the Pressure Gauge expressed as a percentage.
The accuracy of the pressure gauge is closely related to its price. Applications that require less accurate readings can use an accuracy of "3-2-3", which means that the indicators are accurate to plus or minus 3% in the lower third and last third of their measurement range (scale). , and within 2% in the middle third. There are gauges that can be as accurate and go as low as 0.25%.
Gauges pressure or pressure gauges are used in the world for tasks ranging from control of the tires of a car, to pressure monitoring multiple systems in a nuclear power plant.
Adhering to Jyinstruments Metrology performs calibration services for positive and negative pressure gauges in different ranges.
Other uses can be the control of the pressure in a pneumatic or hydraulic circuit, the control of the pressure of the brake fluid in a car, in heating, ventilation, air conditioning and refrigeration systems.
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