Ashcroft 92879 Vacuum Gauge 6 in Dial 1/4 Npt Lower Mount

Product Description

The ASHCROFT 92879 is a vacuum pressure gauge designed for monitoring negative pressure in mechanical and process systems. It features a 6-inch analog dial with a measurement range of -30 to 0 inches of mercury (Hg), making it suited for applications where vacuum levels must be tracked precisely. Accuracy is rated at 0.25 percent of scale, which places it in the high-accuracy category for analog Bourdon tube instruments. The aluminum case and glass lens provide durability in standard service environments. A 1/4-inch NPT lower-mount connection allows direct installation into pipe fittings without additional adapters in most configurations.

This gauge is commonly installed in HVAC evacuation monitoring, refrigeration system service, vacuum pump discharge lines, and light industrial process piping where vacuum measurement is required. The lower-mount configuration positions the connection at the 6 o'clock position on the gauge case, making it practical for panel-mount or direct pipe-mount installations. Licensed HVAC technicians, plumbers, and mechanical contractors are the typical end users for this class of instrument.

Key Features

• 6-inch diameter analog dial for high readability at a distance
• Vacuum range: -30 to 0 inches Hg
• 0.25 percent of scale accuracy for precise vacuum monitoring
• Bronze Bourdon tube construction for reliable pressure sensing
• Aluminum case with glass lens for durability in standard service conditions
• 1/4-inch NPT lower-mount connection for straightforward pipe integration
• CRN certified for applicable Canadian pressure vessel registration requirements

Compatibility

Designed as an OEM-style replacement or field-service gauge for systems requiring 1/4-inch NPT lower-mount vacuum measurement instrumentation with a 6-inch dial format.

Installation Notes

Installation should be performed by a licensed HVAC technician, plumber, or qualified mechanical contractor familiar with pressure instrumentation. Isolate and depressurize or de-energize the system before removing any existing gauge or fitting. Apply thread sealant appropriate for the service medium to the NPT threads, taking care not to contaminate the Bourdon tube inlet. Verify the gauge range is appropriate for the maximum vacuum level of the system before placing into service.