Ashcroft 94338XLL Pressure Gauge 0-100 Psi 3.5 in Lower Mount

Product Description

The ASHCROFT 94338XLL is an industrial-grade analog pressure gauge designed for accurate pressure measurement in demanding service environments. It features a 3.5-inch dial with a 0 to 100 psi range and delivers 1% of scale accuracy, making it suitable for applications where reliable readings matter. The stainless steel case and stainless steel wetted parts — including a 316 stainless steel Bourdon tube — provide corrosion resistance for use with a wide variety of media. The lower-mount MNPT connection simplifies installation on standard process piping and equipment. Weighing 0.25 pounds, this gauge is compact and practical for permanent installation or field use by plumbers, pipefitters, HVAC technicians, and industrial maintenance professionals.

This gauge is suited for residential and light commercial HVAC systems, plumbing installations, compressed air systems, hydraulic circuits, and general industrial process lines where pressures up to 100 psi must be monitored. The lower-mount configuration positions the connection at the 6 o'clock position of the case, allowing direct in-line installation on pipes, manifolds, and pressure test ports. The dry (no-fill) design keeps the gauge compatible with a broad range of environments without the complications of liquid-filled units. Its IP54 and IP65/NEMA 4 ratings make it appropriate for wet or dusty locations.

Key Features

• 3.5-inch analog dial with 0 to 100 psi range and 1% of scale accuracy
• 316 stainless steel Bourdon tube for corrosion resistance with aggressive media
• 304/316 stainless steel case and stainless steel wetted parts throughout
• Lower-mount 1/4 inch MNPT connection for direct pipe or manifold installation
• Polycarbonate lens for impact resistance and clear dial visibility
• Dry (no-fill) design — no liquid filler required
• IP54 and IP65/NEMA 4 rated for wet or dusty environments

Compatibility

Designed as a direct-fit industrial pressure gauge for any system with a standard 1/4 inch MNPT lower-mount port requiring measurement in the 0 to 100 psi range.

Installation Notes

Installation is typically performed by licensed plumbers, pipefitters, or HVAC technicians in accordance with applicable local codes and the system's pressure rating. Depressurize and isolate the system completely before removing an existing gauge or installing a new one. Apply thread sealant or PTFE tape to the MNPT threads per standard practice, and hand-tighten before applying final torque with an appropriate wrench — do not over-torque, as this can damage the case or connection. Verify that the gauge pressure range is compatible with the maximum operating pressure of the system before commissioning.