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Blue sight glass with copper ends and O-ring design

Parker

Parker PSG-2S Personal Protective Equipment

SKU CH-B7J9-1Q30J MPN PSG-2S

A sight glass with sweat fittings, solid copper ends and UL 650 PSIG listing

  • Color and finishBlue
  • Moisture indicator with sight glass for visual system checks
  • UL listed to 650 PSIG for high-pressure reliability
  • Solid copper extended ends resist corrosion in demanding environments
  • 2-piece O-ring design simplifies installation and maintenance
  • Sweat fitting type suits 1/4 x 1/4 copper tubing connections

Moisture Indicator for HVAC Systems

The Parker PSG-2S is a sight glass moisture indicator designed for refrigerant lines. It features solid copper extended ends with a sweat fitting type for secure brazed connections. The unit uses a 2-piece O-ring design and is UL listed for 650 PSIG working pressure.

Technicians Monitoring Refrigerant Condition

This indicator suits HVAC technicians who need visual confirmation of moisture levels during system charging or maintenance. It is not intended for installers who require threaded flare connections instead of sweat fittings. Buyers needing a different port size should look at alternative models.

1/4 Inch Sweat Fitting Connections

The fitting size is 1/4 x 1/4 inch with an overall length of 4 22/25 inches and a cut-out length of 4.19 inches. These dimensions determine whether the sight glass fits the existing copper tubing layout. Verify both measurements before purchase.

How it compares

Measured against everything we stock in Face Masks, Respirators & PPE, at today’s prices. Recalculated every night.

Price $16.99
Cheaper than about 64% of the 5,612 comparable items (median $24.99).

Specifications

Product
Brand nameParker
Model namePSG-2S
Color and finishBlue

Questions about this item

Will the Parker PSG-2S sight glass fit my existing 1/4-inch copper sweat lines without adapters?

Yes, the PSG-2S has 1/4 x 1/4 inch sweat fitting ends designed for direct copper-to-copper brazing onto 1/4-inch tubing.

How can I confirm the Parker PSG-2S is sealed and showing moisture status correctly after installation?

Pressurise the system up to the 650 PSIG UL limit; the indicator element changes colour to show moisture presence while the solid copper ends and O-ring design maintain a leak-free seal.

Does the Parker PSG-2S package include the two-piece body with O-ring, or must I purchase the sealing ring separately?

The unit ships as a complete 2-piece assembly with the O-ring already included; no separate sealing components are required for installation.

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