General Instrument products are made with fine precision, latest automation, and by qualified professionals. They are tested and certified as per industry standards' organizations. Our products are pre-approved on most large company procurements world-wide.


Differential Pressure Gauges - Bellow / Diaphragram Type


Differential pressure gauges are designed to measure the difference in pressure between two points in a system and present the resultant differential pressure directly on a single gauge dial. A patented magnetic movement allows the simultaneous sensing of both pressures while completely isolating the gauge function from the pressure chamber without the use of mechanical seals. 


Bellow/Diaphragm type construction Reference Standard:EN-837 All SS internals chemical seal unit (option)for Process Suitability Accuracy +/- 1% FSD A set of two Stainless Steel Bellows mounted on a force Balance enables direct reading of the actual different pressure. Each Bellow / Diaphragram of the pressure gauge can withstand the full static pressure without any damage or shifting being caused to the instruments 


• Visual Inspection

• Dimensional Verification

• Accuracy Test

• Hysteresis Test

• Leak Test

• Influence Of Mounting Position

• Degree of Protection

• Effect of Mechanical Vibration


•  Effect of Mechanical Shock

•  Endurance Test With Steady Pressure

•  Endurance Test With Over Pressure

•  Endurance Test with Cyclic Pressure

•  Safety Blow-out Test

•  Thermal Stability Test at Rated

•  Temperature effect Test

•  Energy release Test 


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