Ashcroft 92894 Pressure Gauge 8.5 in Dial Lower Mount

Product Description

The ASHCROFT 92894 is a large-dial analog pressure gauge designed for vacuum measurement applications in industrial and mechanical systems. It features an 8.5-inch aluminum case with a lower-mount, 1/4-inch threaded connection and a bronze Bourdon tube sensing element. The gauge reads from -30 to 0 inches of mercury (Hg), making it suited for monitoring negative-pressure systems. Accuracy is rated at 0.25 percent of scale, providing reliable readings for process monitoring and system diagnostics. Licensed tradespeople, service technicians, and instrumentation professionals typically install and commission this gauge in field or panel-mount settings.

This gauge is well suited for residential and commercial mechanical systems where vacuum levels must be monitored continuously or during service procedures. The lower-mount design positions the process connection at the 6 o'clock position, making it a common choice for pipe-mounted or manifold installations where the dial face needs to remain visible from a direct front view. Its large 8.5-inch dial improves readability at a distance, which is useful in equipment rooms and mechanical spaces where gauges are mounted above eye level or across a panel.

Key Features

• 8.5-inch diameter aluminum case for durable, lightweight construction
• Analog dial with vacuum range of -30 to 0 Hg for negative-pressure monitoring
• 0.25 percent of scale accuracy for precise vacuum readings
• Bronze Bourdon tube provides corrosion resistance in typical process media
• Lower-mount, 1/4-inch threaded connection simplifies inline pipe installation

Compatibility

Designed as an OEM-style replacement or direct-install analog vacuum gauge for industrial, HVAC, and mechanical process systems requiring a lower-mount, 1/4-inch threaded pressure gauge with an 8.5-inch dial.

Installation Notes

Installation is typically performed by a licensed HVAC technician, plumber, or instrumentation mechanic. Isolate and depressurize the system completely before removing or installing the gauge to prevent injury or equipment damage. Use appropriate thread sealant rated for the process media on the 1/4-inch NPT connection, and do not overtighten, as aluminum cases can crack under excessive torque. Verify that the system vacuum range does not exceed the gauge scale before placing the instrument in service.