Ashcroft 95439XLL Pressure Gauge 3.5 in 0-200 Psi Back Mount

Product Description

The ASHCROFT 95439XLL is a dry, analog pressure gauge designed for industrial and mechanical service applications requiring accurate pressure monitoring up to 200 psi. The gauge features a 3.5-inch dial for easy readability and mounts via a 1/4-inch threaded center back connection. Accuracy is rated at 1 percent of full scale, making it suitable for systems where consistent, reliable readings are essential. The stainless steel case provides corrosion resistance in demanding environments, while the bronze wetted parts are compatible with a range of common system media. Licensed HVAC technicians, plumbers, and mechanical contractors frequently use this gauge for system commissioning, diagnostics, and ongoing pressure monitoring.

This gauge is appropriate for use in residential and light commercial applications including HVAC refrigerant circuits, plumbing supply systems, compressed air lines, and hydronic heating systems. The center back mount configuration positions the gauge flush against panels or manifolds, keeping connections clean and readable. The dry, no-fill design means no silicone or glycerin fill is present, which suits applications where ambient vibration is minimal and temperature-driven fluid expansion is not a concern.

Key Features

• Pressure range: 0 to 200 psi with analog dial display
• 3.5-inch dial diameter for clear, at-a-glance readings
• 1 percent of full-scale accuracy
• Center back mount with 1/4-inch threaded connection
• Stainless steel case for corrosion resistance
• Bronze wetted parts compatible with common system media
• Dry gauge construction — no liquid fill

Compatibility

Designed as an OEM-style replacement or direct-install analog pressure gauge for residential and commercial mechanical systems requiring a 1/4-inch center back mount configuration and a 0 to 200 psi measurement range.

Installation Notes

Installation should be performed by a licensed plumber, HVAC technician, or qualified mechanical contractor. Always depressurize and isolate the system before removing or installing any pressure gauge. Apply thread sealant or PTFE tape to the male threads per applicable IPC or IFGC guidelines, and avoid over-tightening, which can damage the gauge socket or case. Verify the system's maximum operating pressure does not exceed the gauge's 200 psi full-scale rating before returning the system to service.