JB Industries
JB Industries M2-875 High Side Gauge Red 500 psi
High-side manifold gauge reads 0–500 psi with ±1.00 % accuracy for R-12, R-22 and R-502 systems
- ColorRed
- High-side readings for R-12, R-22 and R-502 systems
- ±1.00 % accuracy ensures reliable diagnostics
- 500 psi range covers typical high-side pressures
- Red dial face gives instant visual identification
- 1/8 in connection fits standard manifold ports
High-Side Gauge for HVAC Manifolds
The JB Industries M2-875 is a high-side pressure gauge designed as a direct replacement for manifold gauge sets. Its red dial face identifies the high-pressure circuit for technicians servicing air-conditioning and refrigeration systems.
Refrigerant Compatibility and Pressure Limits
This gauge is rated for use with R-12, R-22 and R-502 refrigerants across a working range of 0 to 500 psi. Accuracy is specified at plus or minus 1.00 percent of full scale, so readings outside this pressure window or with unlisted refrigerants are not supported.
Installation Notes and Common Issues
The gauge connects via a 1/8 inch port and fits standard manifold blocks, but thread sealant must be applied carefully to prevent leaks. Over-tightening can damage the brass fitting, and the 3 1/8 inch dial requires enough panel clearance to sit flush without binding.
Highlights
- High-side readings for R-12, R-22 and R-502 systems
- ±1.00 % accuracy ensures reliable diagnostics
- 500 psi range covers typical high-side pressures
- Red dial face gives instant visual identification
- 1/8 in connection fits standard manifold ports
Specifications
| Brand | JB INDUSTRIES |
|---|---|
| Color | Red |
Questions about this item
Should I choose the red high-side gauge or a blue low-side gauge for my manifold set?
The red M2-875 is the high-side gauge rated to 500 psi; a blue gauge would be the matching low-side instrument for the same set.
What does the 500 psi working pressure mean when I hook this gauge to a live system?
It means the gauge reads system pressure up to 500 psi, covering normal high-side pressures for R-12, R-22 and R-502 with its stated ±1.00 % accuracy.
The gauge has a 1/8 in connection — what thread standard is that and what does it limit?
The 1/8 in connection uses standard NPT threading, so it fits common manifold ports and caps the maximum working pressure at the gauge's 500 psi rating.
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