Dwyer 3010MR Photohelic Pressure Switch 25 Psi 4 Inch Dial

Product Description

The DWYER 3010MR is a Photohelic pressure switch gauge combining a differential pressure gauge with adjustable high and low set-point switches in a single instrument. Rated to 25 psi maximum with 2% accuracy, it mounts to a surface and connects via 1/8 inch female NPT (FNPT) ports located at the back or side. The 4 inch dial provides clear readout in the field, and the polycarbonate plastic body keeps weight low at 1.625 pounds. Electrical connections are made through included 8 inch cable assemblies. HVAC technicians, industrial maintenance techs, and building automation professionals are the primary installers of this instrument.

This switch gauge is suited for monitoring differential pressure in HVAC air handling systems, cleanrooms, filter banks, and light industrial process applications. It is typically installed where both visual pressure indication and automatic switch actuation are required at the same point in the system. The 1/8 inch FNPT connection and surface-mount design make it adaptable to panel installations and duct-mounted sensing configurations. The instrument handles a minimum pressure of -20 inches water column (Hg), making it useful across a range of positive and negative pressure monitoring tasks.

Key Features

• Combines differential pressure gauge and dual set-point switches in one unit
• 25 psi maximum pressure rating with 2% full-scale accuracy
• 4 inch (101.6 mm) dial face for clear field readout
• 1/8 inch FNPT back and side connections for flexible installation
• Polycarbonate plastic body for corrosion resistance and light weight
• Includes 8 inch (45 cm) cable assemblies for electrical connections
• CE listed

Compatibility

Designed as a direct OEM-style replacement or new-installation Photohelic pressure switch gauge for HVAC air distribution, filter monitoring, and light industrial differential pressure control applications requiring surface-mount NPT connection.

Installation Notes

Installation should be performed by a qualified HVAC technician or instrumentation technician familiar with pressure measurement systems. De-energize all associated control circuits and relieve system pressure before connecting or disconnecting the instrument. Ensure NPT fittings are properly sealed with thread sealant rated for the application pressure and media. Follow applicable local mechanical and electrical codes when wiring the switch outputs.