Ashcroft 94489 Pressure Gauge 0-300 Psi 3.5 in Dial Npt

Product Description

The ASHCROFT 94489 is an analog industrial pressure gauge designed for systems requiring reliable pressure monitoring across a 0 to 300 psi range. The gauge features a 3.5-inch dial with a 1% of scale accuracy rating, making it suitable for applications where consistent, readable measurements are critical. The liquid-filled stainless steel case dampens vibration and reduces pointer flutter in high-cycle or pulsating pressure environments. A 1/4-inch NPT lower mount connection provides straightforward inline or panel installation. Licensed HVAC technicians, plumbers, and pipefitters commonly specify this gauge for mechanical systems requiring durable, long-service instrumentation.

The ASHCROFT 94489 is suited for industrial and commercial mechanical systems where pressure monitoring is required on liquid or gas lines. The lower mount configuration allows direct vertical installation on pipe runs or manifold assemblies. The liquid-filled case makes it appropriate for environments with vibration, pressure pulsation, or temperature variation. It is commonly installed on boiler systems, compressed air lines, hydraulic circuits, chilled water loops, and process piping by licensed trades and facilities maintenance personnel.

Key Features

• 0 to 300 psi pressure range with analog dial readout
• 1% of scale accuracy for reliable field measurements
• Liquid-filled 304/316 stainless steel case dampens vibration and pulsation
• 316 stainless steel Bourdon tube for corrosion-resistant sensing
• 3.5-inch dial diameter for clear visibility in field conditions
• Polycarbonate lens with IP54 and IP65/NEMA 4 environmental ratings
• Meets CRN, PED, and RoHS standards

Compatibility

Designed as an OEM-style replacement or new-installation industrial pressure gauge for 1/4-inch NPT lower mount applications on liquid or gas pressure systems.

Installation Notes

Installation should be performed by a licensed plumber, pipefitter, or qualified mechanical technician. Shut off and depressurize the system fully before removing an existing gauge or installing this unit. Apply appropriate thread sealant to the NPT connection per local plumbing code requirements. Do not over-torque the connection; use a wrench on the gauge body hex, not the case, to avoid damage to the Bourdon tube assembly.