Dwyer Instruments lf251-100-4l 100 Psi Liquid Filled Pressure Gauge

Product Description

The DWYER INSTRUMENTS lf251-100-4l is a liquid-filled industrial pressure gauge designed for demanding service environments where vibration, pulsation, and pressure spikes are common. The gauge features a 2.5-inch dial face with a 0 to 100 psi range and a 0.25-inch male pipe thread (MPT) lower-mount connection. The stainless steel case and glycerin fill dampen pointer movement to keep readings stable and legible. Plumbers, HVAC technicians, and industrial maintenance professionals install this gauge on pressurized fluid and gas systems requiring reliable local pressure indication.

This gauge is suited for residential, commercial, and light industrial applications where panel-mount or inline pressure monitoring is required. The lower-mount connection allows direct pipe installation without additional fittings in most standard configurations. The liquid-filled design makes it a practical choice for hydraulic lines, water systems, compressors, and process piping where continuous vibration or pressure surges would quickly damage a dry gauge.

Key Features

• Liquid-filled design dampens pointer vibration for accurate readings under pulsating pressure
• 2.5-inch dial face provides clear local readout in confined panel or pipe installations
• 0.25-inch MPT lower-mount connection for direct inline pipe installation
• 100 psi range suitable for common water, air, and fluid system monitoring
• Stainless steel case offers corrosion resistance in wet or harsh environments

Compatibility

Designed as an OEM-style replacement or direct-install gauge for industrial and commercial pressurized systems requiring a 0.25-inch MPT lower-mount liquid-filled gauge with a 2.5-inch dial and 100 psi range.

Installation Notes

Installation should be performed by a licensed plumber, HVAC technician, or qualified industrial maintenance professional. Depressurize and isolate the system before removing or installing any pressure gauge. Apply thread sealant tape to the MPT threads per standard practice, and do not overtighten, as this can crack the gauge socket. Verify system operating pressure does not exceed the rated gauge range before returning the system to service.

Technical Specifications

• Pressure Range: 0 to 100 psi
• Dial Size: 2.5 inches
• Connection Size: 0.25 inches MPT
• Mount Type: Lower Mount
• Fill Type: Liquid Filled
• Case Material: Stainless Steel

Standard Information

• Brand: DWYER INSTRUMENTS
• Manufacturer Part Number: lf251-100-4l