Dwyer 2-5040 Minihelic II Differential Pressure Gauge 0-40 Inch w.c.

Dwyer 2-5040 MINIHELIC II, DIFFERENTIAL PRESSURE GAUGE, 0-40

• Housing is molded from strong mineral and glass filled nylon.
• Pointer stops of molded rubber prevent pointer over-travel without damage.
• Full view lens is removable and molded 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 molded 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 molded into the edgeof the diaphragm.

Specifications:

Service: Air and compatible gases.

Wetted Materials: Consult factory.

Housing: Glass filled nylon; acrylic lens.

Accuracy: ±5% of full scale 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. Consult factory for other position orientations.

Process Connections: Barbed, for 3/16″ I.D. tubing (standard); 1/8″ male NPT (optional).

Weight: 6 oz (170.1g).

CAUTION: FOR USE ONLY WITH AIR OR COMPATIBLE GASES.