Ashcroft 251009S02LLL800 Pressure Gauge 0-800 Psi

Product Description

The ASHCROFT 251009S02LLL800 is an industrial-grade analog pressure gauge designed for demanding fluid and gas system monitoring applications. It features a 2.5-inch dial face, a 0 to 800 psi measurement range, and a lower-mount 1/4-inch MNPT connection. The Bourdon tube is constructed from 316 stainless steel, and all wetted parts are stainless steel, making it well suited for corrosive media and harsh environments. The case is 304/316 stainless steel with a polycarbonate lens. This gauge is dry (no liquid fill) and reads via a standard analog dial. Licensed plumbers, pipefitters, HVAC technicians, and industrial mechanics install and service this type of instrument.

This gauge is used in residential, commercial, and light industrial settings where accurate pressure monitoring is required on water, air, oil, or compatible gas lines. The lower-mount MNPT connection fits standard pipe thread fittings, allowing direct installation into a tee, manifold, or pressure port. Its stainless steel wetted parts and rugged case make it appropriate for outdoor installations or environments where moisture and washdown exposure are concerns. The IP54 and IP65/NEMA 4 ingress protection ratings confirm its suitability for wet and dusty service conditions.

Key Features

• 0 to 800 psi pressure range with 1 percent of scale accuracy
• 2.5-inch analog dial for clear visual readings at close range
• 316 stainless steel Bourdon tube for corrosion-resistant performance
• 304/316 stainless steel case with polycarbonate lens
• Lower-mount 1/4-inch MNPT connection for direct pipe thread installation
• Dry (no liquid fill) design rated to IP54 and IP65/NEMA 4 ingress protection standards
• Meets CRN, PED, and RoHS standards

Compatibility

Designed as an OEM-style replacement or direct-install industrial pressure gauge for systems requiring a lower-mount, 1/4-inch MNPT, 2.5-inch dial gauge rated to 800 psi with stainless steel wetted parts.

Installation Notes

Installation should be performed by a licensed pipefitter, plumber, or qualified mechanic in accordance with applicable local codes and the system manufacturer's instructions. Isolate and depressurize the system completely before removing any existing gauge or installing this one. Use appropriate thread sealant on the MNPT threads and tighten to fitting manufacturer specifications — do not over-torque the gauge body. Verify the gauge pressure range is appropriate for the system's maximum operating pressure before returning the system to service.