This differential pressure gauge using frictionless magnetic components, can rapidly measure the micro-pressure air or non-corrosive gases, including positive, negative (vacuum) or differential. No wear, hysteresis and clearance. Not filling, vaporization and freezing. This design has anti-vibration, anti-shake and high overpressure capability, you can guarantee access to high precision.
The design impact, shock and overload protection with visual alert.

Pressure Limits: -20" Hg to 15 PSI (-0.677 bar to 1.034 bar); MP option: 35 PSI (2.41 bar); HP option: 80 PSI (5.52 bar)
Media Compatibility: Air and compatible non combustible gases
Accuracy: ±2% full span (±3% on 2000-100Pa and 2000-125Pa; ±4% on 2000-60Pa ranges) at 21°C (70 °F)
Temperature Range: -6.7 to 60°C (20 to 140°F)
Process Connections: 1/8" female NPT duplicate high and low pressure taps – one pair side and one pair back.
Housing: Die cast aluminum case and bezel, with acrylic cover
Weight: 1 lb 2 oz (510 g), MP & HP 2 lb 2oz (963g)

·Manometer

·Mounting fittings：3 small mounting screws，3 long mounting screws，2 black rubber joints and 4 other parts

Positive Pressure Measurement: Connect the pressure tubing to either of the two ports marked “high pressure” on the gage and plug the other one. Vent the ports marked “low pressure” to atmosphere.

Negative Pressure Measurement: Connect the pressure tubing to either of the two ports marked “low pressure” on the gage and plug the other one. Vent the ports marked “high pressure” to atmosphere.

Differential Pressure Measurement: Connect the higher pressure tubing to either of the two ports marked “high pressure” on the gage and plug the other one. Connect the lower pressure tubing to either of the two ports marked “low pressure” on the gage and plugging the other one.