Dwyer 2-5002 Minihelic II Differential Pressure Gauge 0-2 INCH W.C

Dwyer 2-5002 Minihelic II Differential Pressure Gauge 0-2 INCH W.C

Dwyer 2-5002 Offers


  • Housing is moulded from strong mineral and glass filled nylon
  • Pointer stops of moulded rubber prevent pointer over-travel without damage
  • Full view lens is removable and moulded of tough acrylic
  • Aluminum scale litho-printed black on white, enhances readability
  • Red tipped aluminum pointer, rigidly mounted to helix is easy to see
  • Wishbone assembly provides mounting for helix, helix bearings, and pointer shaft
  • Jewel bearings provide virtually friction-free helix motion
  • Helix is free to rotate in jewel bearings. It aligns with magnetic field of magnet to transmit pressure indications to pointer
  • Zero adjustment screw, located behind the removable lens, eliminates tampering
  • Range spring calibration clamp fixes live length of spring for proper gauge calibration and is factory set and sealed
  • Silicone rubber diaphragm allows accurate response to a broad range of temperatures and at extremely low pressure. Incorporates blow out area for overpressure protection
  • Diaphragm support plates of lightweight aluminum on each side of the diaphragm minimize position or attitude sensitivity and help define pressure area
  • Flat leaf range spring reacts to pressure on the diaphragm. Live length is adjustable for calibration. Small amplitude of motion minimizes inaccuracies and assures long life
  • Low pressure tap connects to rear chamber
  • Coil spring link provides a resilient connection between the diaphragm and the range spring
  • Ceramic magnet mounted on a moulded bracket at the end of the range spring rotates the helix without direct mechanical linkage
  • High pressure tap connects with the front chamber through passageway in the plastic case and a sealing ring moulded into the edge of the diaphragm


  • Room Positive Pressure Sensing
  • Local Indication on Filter Status
  • Face Velocity on Fume Hood
  • Duct Pressures

Dwyer 2-5002 Specifications

Service Air and compatible gases
Housing Glass filled nylon
polycarbonate lens
Accuracy ±5% of FS at 70°F (21.1°C)
Pressure Limits 30 psig (2.067 bar) continuous to either pressure connection
Temperature Limits 20 to 120°F (-6.67 to 48.9°C)
Mounting Orientation Diaphragm in vertical position
Process Connections Barbed, for 316” ID tubing (standard)
⅛” male NPT (optional)
Weight 6 oz (170.1 g)
Agency Approvals Meets the technical requirements of EU Directive 2011/65/EU (RoHS II)