Jb Industries m2-924 Compound Gauge R-22 R-404A R-410A

Product Description

The JB INDUSTRIES m2-924 is a low-side compound gauge designed for HVAC refrigeration service work requiring precise pressure readings. Built to Class One accuracy at 1 percent, it measures both positive pressure and vacuum on the low side of a refrigerant circuit. The dial face measures 3-1/8 inches (80 mm) in diameter and features a glow-in-the-dark design that stores ambient light energy to remain readable in dark or poorly lit service environments. This gauge is a standard instrument for licensed HVAC technicians performing system diagnostics, evacuation verification, and refrigerant charge work.

The m2-924 is rated for use with R-22, R-404A, and R-410A refrigerants, making it a versatile tool for service fleets handling both legacy and current residential and light commercial refrigeration and air conditioning systems. Its blue color coding identifies it as a low-side compound gauge, consistent with standard manifold gauge set conventions. The large 80 mm dial improves readability during service calls, including in attics, mechanical rooms, and other low-light conditions where the glow-in-the-dark feature provides a practical advantage.

Key Features

• Class One accuracy rated at 1 percent for reliable low-side pressure diagnostics
• 3-1/8 inch (80 mm) diameter dial for improved readability in tight or dark spaces
• Glow-in-the-dark dial stores light energy and emits it in dimly lit or dark environments
• Compatible with R-22, R-404A, and R-410A refrigerants
• Blue dial color coding identifies low-side compound gauge at a glance
• Compound gauge reads both positive pressure and vacuum

Compatibility

Rated for use with R-22, R-404A, and R-410A refrigerants. Designed as a low-side compound gauge for use in manifold gauge set assemblies servicing residential and light commercial HVAC and refrigeration systems using these refrigerants.

Installation Notes

This gauge is a sensitive pressure instrument and must not be subjected to pressures beyond its scale range. Installation and refrigerant service work should be performed by EPA Section 608 certified technicians using appropriate manifold gauge set equipment. Always recover refrigerant and relieve system pressure before connecting or disconnecting gauge lines. Handle the gauge carefully to avoid impact damage that can affect calibration accuracy.

Technical Specifications

• Dial Diameter: 3-1/8 inches (80 mm)
• Accuracy Class: Class One, 1 percent
• Gauge Type: Compound (low side)
• Refrigerant Compatibility: R-22, R-404A, R-410A
• Dial Color: Blue (glow-in-the-dark)

Standard Information

• Brand: JB INDUSTRIES
• Manufacturer Part Number: m2-924