JB Industries
JB Industries M2-825L HVAC control Red LED R-22 R-404A R-410A 500 psi
High-side manifold gauge with red LED display for R-22, R-404A and R-410A systems rated to 500 psi with ±1.00% accuracy
- ColorRed LED
- Red LED display improves low-light readability
- Compatible with R-22, R-404A and R-410A refrigerants
- 500 psi working pressure handles high-side demands
- ±1.00 % accuracy ensures reliable readings
- 3 1/8 in diameter fits standard manifold sets
High-side manifold gauge for R-22, R-404A and R-410A
This high-side replacement gauge is built for manifold sets used with R-22, R-404A and R-410A refrigerants. A red LED dial provides clear pressure reading in low-light conditions. The instrument handles a working pressure of 500 psi with a stated accuracy of 1.00 percent. It suits technicians servicing residential and light commercial air-conditioning systems.
Simple thread-on fitting with one common pitfall
Installation requires threading the 1/8 in connection onto the existing manifold block, a task completed with basic hand tools. The main issue occurs when the old seal remains in the port or the new gasket is omitted, causing leaks under load. Over-tightening the brass fitting can strip the manifold threads, so firm hand pressure plus a slight wrench turn is sufficient.
Accuracy and pressure ceiling define the practical
The +/- 1.00 percent tolerance means readings may deviate by up to five psi at full scale, which is acceptable for charging and diagnostics but not for laboratory calibration. The 500 psi ceiling prevents use on transcritical CO2 or high-pressure hydrocarbon systems. The gauge is calibrated only for the three listed refrigerants, so pressure-temperature conversions for other fluids will be incorrect.
Highlights
- Red LED display improves low-light readability
- Compatible with R-22, R-404A and R-410A refrigerants
- 500 psi working pressure handles high-side demands
- ±1.00 % accuracy ensures reliable readings
- 3 1/8 in diameter fits standard manifold sets
Specifications
| Brand | JB INDUSTRIES |
|---|---|
| Color | Red LED |
Questions about this item
How do I confirm the 500 psi gauge reads within the ±1.00 % accuracy after installation?
Pressurise the system with R-22, R-404A or R-410A and compare the needle to a calibrated reference gauge; the reading should stay inside the stated tolerance.
Does the M2-825L ship with a manifold block and hoses or only the high-side gauge?
The listing covers the high-side replacement gauge alone; manifold body, low-side gauge and charging hoses are sold separately.
Which refrigerant scale on the dial matches my R-410A work?
The face includes temperature-pressure arcs for R-22, R-404A and R-410A so you read the correct scale for the refrigerant in use.
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