HA788-Minihelic® II Differential Pressure Gauge

• 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
• Precision litho-printed scale is accurate and easy to read
• Red tipped pointer of heat treated aluminum tubing is easy to see
• "Wishbone" assembly provides mounting for helix, helix bearings and pointer shaft
• Jewel bearings provide virtually friction-free motion for helix
• Helix is free to rotate in jewel bearings and 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 at extremely low pressure and 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
• 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 edge of the diaphragm

Specifications

• Dial Diameter: 2-1/16"
• Pressure Range: 0 - 0.5 in. w.c.
• Connection: Panel Mount
• Dial Type: Analogue

Additional Specifications

• Lens Material: Acrylic