Application: To neasure pressure in refrigerant ayatems contacting freon, with dual psi and corresponding degrees F scale calibrated for R-12, R22, R134a, R-404a, R-502 and R-507, these gauges allow for quick servicing of systems containing refrigerant gases. Used for commercial refrigeration, residential air-conditioning and automotive air-conditioning units.

Gauge size: 2.5"(63mm), 3"(80mm)

Accuracy: ±1.6% of full scales
                     1% at zero pressure
                     2% in the first 75% of the scale
                     5% in the last 25% of the scale

Range available(no stock): -30inHg/120psi, retard to 350 psi, 0/500 psi 
                                              special range is available

Working Pressure: steady: 3/4 of full scale
                                fluctuating: 2/3 of full scale
                                short time: full scale

Operation temperature: ambient: -20~60℃
                                        media: max.60℃

Service fluid: compatible gases and liquids

Gauge housing: blue steel case

Windows: thread polycarbonate lens

Bourdon tube: copper alloy

Movement: semi-brass

Connection: brass

Thread: BSP, BSPT, NPT, or metric thread

Dials: aluminum with stop pin and black lettering
            zero-adjustment screw on dial

Scale: bar and °F

Optional extras: housing can be changed to be blue or red ABS case
                            windows also can change to snap-in polycarbonate lens