Dwyer Instruments tl40-v30-4l Compound Gauge 4 in

Product Description

The DWYER INSTRUMENTS tl40-v30-4l is a utility-grade compound vacuum and pressure gauge designed for systems that require monitoring on both sides of atmospheric pressure. It reads from 30 inches of mercury vacuum through zero and up to 30 psi, making it suitable for refrigeration, HVAC, plumbing, and general industrial applications. The gauge features a 4-inch dial for clear field readability and a 1/4-inch lower mount connection. Licensed HVAC technicians and plumbers commonly install this gauge on vacuum pump manifolds, pressure test rigs, and low-pressure fluid systems where both vacuum and positive pressure readings are needed.

This compound gauge fits residential and light commercial service scenarios where a single instrument must cover vacuum pull-down and pressure buildup in the same circuit. Typical applications include refrigerant system evacuation checks, water pressure testing, and compressed-air low-pressure monitoring. The lower-mount configuration suits panel or bulkhead installations where the process connection enters from beneath the gauge body. No specific model compatibility data was provided with this SKU.

Key Features

• Compound range covers 30 in Hg vacuum through 30 psi positive pressure on a single dial
• 4-inch dial diameter provides clear reading at typical field working distances
• 1/4-inch lower mount process connection for panel and bulkhead installations
• Utility construction suited to HVAC, refrigeration, plumbing, and general industrial service
• Single-instrument solution eliminates the need for separate vacuum and pressure gauges on the same circuit

Compatibility

Designed as an OEM-style replacement or service gauge for utility compound vacuum and pressure gauge applications on HVAC, refrigeration, and plumbing systems requiring a 1/4-inch lower mount connection and a 4-inch dial format.

Installation Notes

Installation should be performed by a licensed HVAC technician or plumber. Isolate and depressurize the system completely before removing any existing gauge or fitting the new one. Apply thread sealant approved for the service fluid to the 1/4-inch NPT connection and tighten to snug-plus-hand-tight without over-torquing the gauge body. Verify the system is within the gauge range before returning it to service.

Technical Specifications

• Gauge Type: Compound Vacuum and Pressure
• Range: 30 in Hg to 30 psi
• Dial Size: 4 inches
• Connection Size: 1/4 inch
• Mount Type: Lower Mount

Standard Information

• Brand: DWYER INSTRUMENTS
• Manufacturer Part Number: tl40-v30-4l