JB Industries
JB Industries QC-G820 Low Side Gauge Blue R-22 R-404A R-410A
Blue low-side gauge reads R-22, R-404A and R-410A pressures to 500 psi with ±1.00 % accuracy
- ColorBlue
- Accurate low-side readings with ±1.00 % gauge precision
- Compatible with R-22, R-404A and R-410A refrigerants
- Handles up to 500 psi working pressure
- 3 1/8 in dial for clear visibility
- 1/4 in connection fits standard service ports
Low-Side Gauge for HVAC Diagnostics
The JB Industries QC-G820 is a low-side pressure gauge built for technicians servicing air-conditioning and refrigeration equipment. It is calibrated for R-22, R-404A and R-410A refrigerants, making it suitable for common residential and light commercial systems. The blue dial face provides clear identification for low-side readings during routine maintenance or troubleshooting.
Pressure Range and Accuracy
The gauge operates to a working pressure of 500 psi with a stated accuracy of ±1.00 percent across the scale. This range covers typical low-side pressures encountered in the listed refrigerants under normal operating conditions. Pressures exceeding the 500 psi limit risk permanent damage to the bourdon tube and will void the instrument's accuracy guarantee.
Connection and Application Limits
A 1/4 inch connection fits standard manifold hoses and service ports used on larger systems and refrigerant tanks. The 3 1/8 inch dial diameter offers readable increments for quick pressure checks, but the gauge is not intended for high-side measurements or for refrigerants outside the three specified types. Users requiring high-side data or different refrigerant scales must select a separate instrument.
Highlights
- Accurate low-side readings with ±1.00 % gauge precision
- Compatible with R-22, R-404A and R-410A refrigerants
- Handles up to 500 psi working pressure
- 3 1/8 in dial for clear visibility
- 1/4 in connection fits standard service ports
Specifications
| Brand | JB INDUSTRIES |
|---|---|
| Color | Blue |
Questions about this item
Will the 1/4 in connection on this QC-G820 gauge thread onto my existing R-22 manifold hose?
Yes, the 1/4 in connection is the industry standard flare fitting used on R-22, R-404A and R-410A manifold hoses, so it will thread directly onto the hose you already own.
How can I verify the gauge reads within its stated +/- 1.00 Percent accuracy after I install it?
Pressurise the system with a known refrigerant, compare the needle to a calibrated reference gauge at the same temperature, and confirm the difference is no greater than 1.00 percent of full scale.
Does the box include a 1/4 in hose or adapter, or only the blue low-side gauge itself?
Only the gauge is supplied; a 1/4 in hose, coupler or any adapter must be purchased separately.
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