Overview: The Dwyer 475-FM Mark III is a rugged, intrinsically safe handheld manometer designed for differential, positive, and negative pressure measurement. With a wide range from 1 inH₂O to 150 psid, it’s ideal for HVAC diagnostics, cleanroom verification, and gas line monitoring.
Key Features:
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FM-approved for Class I, Div 2 hazardous locations
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±0.5% FS accuracy (60–78°F)
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Dual push pads for power, auto-zero, and unit selection
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Measures in inH₂O, mmHg, psi, kPa, and more
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Durable aluminum housing with large LCD display
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9V battery powered – up to 100 hours runtime
Applications:
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HVAC system balancing
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Cleanroom pressure monitoring
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Natural gas line diagnostics
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Air velocity measurement (with optional Pitot tube)
What’s Included:
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Dwyer 475-FM manometer
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Rubber tubing (3/16" ID, 9')
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Static pressure tips
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Optional air velocity kit
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User manual & calibration certificate
PLEASE CALL OUR OFFICE FOR DELIVERY TIMES : +603-56371911