Ashcroft 91543XLL Pressure Gauge 0-100 Psi 4.5 in Dial

Product Description

The ASHCROFT 91543XLL is a process industrial pressure gauge designed for demanding commercial and industrial service applications. It features a 4.5-inch analog dial with a 0 to 100 psi range and delivers an accuracy of 0.5 percent of scale, making it suitable for precision pressure monitoring in process systems. The case is aluminum with stainless steel wetted parts for corrosion resistance, and the lens is glass. The gauge is no-fill (dry) type and mounts via a rear flange with a 0.5-inch MNPT connection. Licensed HVAC techs, pipefitters, plumbers, and industrial maintenance professionals install this gauge in process piping and equipment panels.

The 91543XLL is suited for process piping systems in residential, commercial, and light industrial environments where accurate pressure readings are required at panel-mount or rear-flange locations. The rear flange mount integrates cleanly into control panels or bulkhead installations. Its stainless steel wetted parts make it appropriate for mildly corrosive media, and the glass lens and aluminum case hold up under standard process conditions. The gauge carries CRN certification and meets IP66 and NEMA 4X ingress protection ratings, qualifying it for wet or washdown environments.

Key Features

• 4.5-inch analog dial for easy reading at distance
• 0 to 100 psi range with 0.5 percent of scale accuracy
• Stainless steel wetted parts for corrosion resistance
• Aluminum case with glass lens
• Rear flange mount with 0.5-inch MNPT connection
• Dry (no-fill) construction — no liquid filler
• IP66 and NEMA 4X rated for washdown and outdoor environments

Compatibility

Designed as an OEM-style process pressure gauge for use in industrial and commercial process piping systems requiring a rear flange mount, 0.5-inch MNPT connection, and a 4.5-inch dial format.

Installation Notes

Installation is typically performed by licensed plumbers, pipefitters, or industrial maintenance technicians. Isolate and depressurize the system completely before removing or installing the gauge. Apply appropriate thread sealant to the MNPT connection per the piping system requirements and applicable plumbing or process codes. Do not overtighten the threaded connection, as this can damage the gauge socket or process fitting.