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Red high-side HVAC gauge, 3-1/8 inch dial, glow-in-the-dark face

JB Industries

JB Industries M2-825 High Side Gauge Red 800 psi

SKU CH-GP0A-8GR83

High-side manifold gauge reads up to 800 psi for R-22, R-404A and R-410A systems

  • Product colorGlow-in-the-Dark, Red
  • Glow-in-the-dark dial improves low-light visibility
  • High-side gauge reads up to 800 psi working pressure
  • +/-3-2-3% accuracy class supports precise refrigerant charging
  • Compatible with R-22, R-404A and R-410A systems
  • 1/8 in connection fits standard manifold gauge sets

High-Side Gauge for HVAC Manifolds

The JB Industries M2-825 is a high-side replacement gauge designed for manifold gauge sets used in air-conditioning and refrigeration service. It suits technicians who need a direct swap for a worn or damaged high-pressure instrument.

Glow-in-the-Dark Dial Improves Low-Light Reading

The gauge face uses a glow-in-the-dark red finish that remains visible in dim engine bays or crawl spaces without a flashlight. This feature helps technicians read pressure values during night calls or in poorly lit mechanical rooms.

Simple Thread-On Installation

The gauge installs by threading its 1/8 inch connection directly onto the manifold block, requiring only a wrench and thread sealant. The main risk is cross-threading the fitting or over-tightening, which can damage the manifold port or the gauge bourdon tube.

How it compares

Measured against everything we stock in Heating & Cooling Controllers, at today’s prices. Recalculated every night.

Price $24.99
Cheaper than about 68% of the 1,762 comparable items (median $45.99).

Specifications

Product
Brand nameJb Industries
Product colorGlow-in-the-Dark, Red

Questions about this item

How often does the M2-825 high-side gauge need recalibration to stay within its ±3-2-3 % accuracy?

The gauge is built to hold its ±3-2-3 % accuracy class under normal HVAC service; no periodic recalibration is mandated by the manufacturer.

What is the first limit reached when the gauge is used continuously at high-side pressure?

The 800 psi working-pressure ceiling is the hard limit; sustained readings above that risk permanent damage to the bourdon tube.

Does the red glow-in-the-dark dial add heat or power draw during all-day use?

No — the luminescent dial is passive, requires no electricity and generates no measurable heat during extended operation.

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