2-5000-250PA Dwyer Minihelic Differential Pressure Gauge, range 0-250Pa

The Dwyer 2-5000-250PA Minihelic® differential pressure gauge measures air pressure across a 0–250Pa range, offering an accurate and cost-effective solution for building services engineers and HVAC professionals.

With its removable lens and rear housing, this gauge is straightforward to service in the field — making it well suited to both OEM installations and end-user applications.

Key specifications:

• Pressure range: 0 to 250Pa
• Accuracy: ±5% of full scale at 21.1°C (70°F)
• Max working pressure: 2.067 bar (30 psig) continuous to either connection
• Operating temperature: -6.67 to 48.9°C (20 to 120°F)
• Process connections: barbed, 3/16" ID tubing (standard); 1/8" male NPT (optional — see note below)*
• Housing: glass-filled nylon with polycarbonate lens
• Weight: 170g (6 oz)
• Diaphragm orientation: vertical (consult Dwyer for other orientations)
• Compliance: RoHS II (EU Directive 2011/65/EU)
• For use with air and compatible non-corrosive gases only

Typical applications:

• Filter status indication (local display on air handling units)
• Room positive pressure monitoring (clean rooms, isolation rooms)
• Face velocity measurement on fume hoods and laminar flow hoods
• Duct pressure measurement in HVAC systems
• Cabinet air purging
• Electronic equipment cooling air systems
• Air samplers and medical respiratory equipment

The Minihelic® series is Dwyer's most compact differential pressure gauge, combining a clear, easy-to-read scale with a low-profile housing suitable for panel mounting in demanding environments.

* Note on connections: The 1/8" NPT optional fitting is an American standard. If your installation requires BSP connections, please contact us before ordering — we can advise on suitable adapters.

Compatible accessories available from iACS include Dwyer A-220 connection tubing, A-481 fittings kit, A-605 mounting kit, and A-369 stand/hang bracket.

For electronic differential pressure measurement with 4–20mA or 0–10V output, see our range of pressure transducers.