Dwyer Series 2-5000 Minihelic II Differential Pressure Gauge

Compact mechanical indication of low differential pressure for air and compatible non-corrosive gases where panel space is limited.

The Dwyer Series 2-5000 Minihelic II is a compact mechanical gauge for local indication of pressure difference in air and compatible non-corrosive gas applications. It requires no external power and provides indication only; it does not provide switching, control or a transmitted output.

Its 2-1/16 in dial and compact housing suit equipment panels and installations where a larger gauge would use unnecessary space. The glass-filled nylon housing and polycarbonate lens provide a lightweight construction, while a diaphragm blow-out membrane accommodates over-pressure events within the stated pressure limits.

Typical uses include filter-status indication, duct-pressure monitoring and positive room-pressure sensing, together with cabinet air purging, electronic cooling systems, air samplers, laminar-flow hoods, fume-hood face-velocity indication and medical respiratory equipment.

The family covers multiple ranges in inches water column, millimetres water column, pascals, kilopascals and psid. Standard models use barbed connections for 3/16 in ID tubing; 1/8 in male NPT and bottom-barb configurations are available as ordering options where applicable.

Surface and panel mounting are supported with the supplied hardware, and portable or stand-hang arrangements can be added using Series 2-5000 accessories. The gauge is factory zeroed with the diaphragm vertical; models below 5 in w.c. equivalent should be used vertically unless a special calibration for another orientation was specified.

To select the correct model, confirm the required range and engineering unit, process connection and mounting arrangement, together with any calibration-certificate requirement, before ordering. Wetted-material compatibility should be checked with DwyerOmega where the gas service is compatibility-critical.

Key Features

• Mechanical local indication: Displays positive, negative or differential pressure according to the pressure-port arrangement, without electrical power
• Compact serviceable construction: Removable lens provides access to the zero adjustment, while the removable rear housing supports servicing
• Pressure protection: Diaphragm assembly incorporates a blow-out membrane for over-pressure accommodation within the rated limits
• Supplied mounting hardware: Studs, nuts and a panel bracket support standard surface or panel installation
• Connection selection: Standard 3/16 in ID tubing barbs can be specified with optional 1/8 in male NPT or bottom-barb arrangements where available
• Installation zero adjustment: Supplied Allen key provides access to the zero adjustment after the gauge is installed in its final orientation
• Calibration and identification options: Factory calibration, NIST-traceable certification and an aluminium tag can be specified at order stage

Specifications

Scope of Delivery

• Series 2-5000 Minihelic II gauge in the selected configuration
• Two 4-40 x 1-5/8 in mounting studs
• Two 4-40 hex nuts
• One 0.050 in hex Allen key
• One panel mounting bracket

Support

Able Instruments are an official UK and Ireland channel partner for DwyerOmega, providing application advice, configuration support and quotation assistance for the Series 2-5000 Minihelic II family.

• Model selection: Support matching an existing gauge or defining the correct pressure range and scale
• Option compatibility: Checks for -BB, -NPT, -FC, -NIST and -AT options
• Installation support: Advice on mounting orientation, tubing, panel installation and compatible accessories
• Documentation support: Help confirming factory-calibration and NIST-traceable certificate requirements

Accessories