Basic Principle of Piston Pressure Gauges

Product Introduction

I. Features of Gas Piston Pressure Gauge

1. Complies with JJG 1086-2013 Verification Regulation of Gas Piston Pressure Gauges. Uses high-purity nitrogen as the medium, eliminating the viscosity of lubricating oil and greatly improving sensitivity and accuracy. Sensitivity can reach 10 mg, with simpler and safer operation.
2. Equipped with a touchscreen LCD display system with temperature, humidity and pressure display functions.
3. Multiple pressure unit conversion: MPa, kPa, psi, bar.
4. New structure for the measurement section — no need to flip the piston head for positive/negative pressure measurement; simply swap the pressure/vacuum bell for more convenient and faster operation.
5. Multi-stage filtration device prevents fine dust from entering the piston and affecting measurement accuracy.
6. Safety valve on the body — automatically exhausts if excessive air intake occurs due to operational errors, protecting the piston system from damage.
7. Vacuum and positive pressure switching valve — can connect both a vacuum pump and a nitrogen cylinder simultaneously, eliminating the need to repeatedly disconnect and reconnect tubing.
8. Latest structure for fine adjustment — reliable sealing; the lead screw does not extend during pressure adjustment, saving space.
9. Aluminum alloy base — lightweight, sturdy and aesthetically pleasing.
10. Wear-resistant and rod-breakage-proof design — wear-free rod-breakage-proof piston system with rolling contact at limit positions, ensuring zero wear on the piston disc.
11. 3.5-inch color touchscreen for piston display — shows piston rod displacement, on-site temperature and humidity.
12. Two M20×1.5 pressure ports, configurable with shut-off valves for leak-tightness testing.

II. Features of Liquid Piston Pressure Gauge

1. Complies with national metrological verification regulations JJG 59-2022 Piston Pressure Gaugesand JJG 99-2006 Weights.
2. Wear-resistant and rod-breakage-proof design — wear-free rod-breakage-proof piston head with rolling contact at limit positions, ensuring zero wear on the piston disc.
3. Aluminum alloy housing — sturdy and stable.
4. 400 mL oil cup with built-in oil contamination filter. The gauge connection pipeline feeds directly into the oil cup through a blowdown filter, ensuring clean oil enters the piston system and preventing dirty oil from causing blockage, damage or even piston rod seizing and breakage.
5. Piston displacement data acquisition uses two infrared distance sensors, with custom-designed circuitry for data conversion and display on the LCD — making displacement observation more convenient and accurate.
6. 3.5-inch color touchscreen for piston display — shows piston rod displacement, on-site temperature and humidity.
7. Oil circuit system with blowdown function — simpler and more convenient maintenance and cleaning.
8. Piston display section with touch-sensitive power button and displacement calibration button.
9. Two M20×1.5 pressure ports, configurable with shut-off valves for leak-tightness testing.

III. Piston Pressure Gauge Selection Guide