Dwyer Pressure, Differential Gauges
Series 2000 Magnehelic® Differential
Pressure Gauges --
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Clear plastic face
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Precision litho-printed scale
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Red tipped pointer
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Pointer stops
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Zero adjustment screw
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"0" ring seal
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Die cast aluminum case
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Silicone rubber diaphragm
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Calibrated range spring
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Ambient temperature range: 20° to 140°F (low temperature models
available as special option)
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Rated total pressure: 20" Hg to 15 PSIG (For applications with high cycle
rate within gauge total pressure rating, next higher rating is recommended)
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Connection: 1/8" NPT high and low pressure taps, duplicated - one pair
side and one pair on back
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Accuracy: ±2% of full scale (3% on 0 and 4% on -00 ranges), throughout
range at 70°F
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Options: Transparent overlays; Adjustable signal flag; Portable units;
Air filter gauge accessory package
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Standard accessories: Two 1/8" NPT plugs for duplicate pressure taps, two
1/8" pipe thread to rubber tubing adapters, and three flush mounting adapters
with screws (Mounting ring and snap ring retainer substituted for 3 adapters
in MP & HP gauge accessories)
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Series 3000 Photohelic®
Series 43000 Capsu-Photohelic® Pressure Switch/Gauges
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Lighted gauge face to indicate operation
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Glass-epoxy printed circuit boards
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Spring loaded friction clutch to prevent operator damage of set point mechanism
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Ambient temperature range: 20 to 120šF (low temp models available as option)
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Rated pressure: Photohelic -20" Hg to 25 PSIG total pressure on either
side of diaphragm (M.P. model to 35 PSIG and H.P. model to 80 PSIG also
available); Capsu-Photohelic: -20" Hg. to 500 PSIG 1.2 x full scale reading
for 436000S models
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Accuracy: Photohelic ±2% of full scale at 70°F (3% on -0, 4%
on 00 models); Capsu-Photohelic ±3% of full scale at 70°F, (2%
on 43000S/436000S models, 4% on 43215/43220/43500)
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Gauge connections: Photohelic 1/8" NPT; Capsu-Photohelic 1/4" NPT, 436000S
models, single 1/8" NPT, top
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Optional brass case available for water/water based solutions
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Available with one or two photocell actuated relays
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DPDT relays can be easily interlocked to provide variable deadband control
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May be used for positive, negative, or differential pressures as low as
0 to .25" water column to 0-6000 PSIG full scale or for set points as low
as .01 WC on .25" scale unit
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Series 4000 Capsuhelic® Differential
Pressure Gauge
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"O" ring seal
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Clear plastic front cover
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Precision scale
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Red tipped pointer
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Zero adjustment screw
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Precision made case
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Ambient temp. range: 20 to 200°F
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Pressure rating: -20" Hg to 500 PSIG
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Accuracy: ±3% of full scale at 70°F (2% on 4000S models, 4%
on 4215, 4220, and 4500)
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Die cast aluminum housing with Teflon impregnated hard coat anodizing,
standard (optional forged brass housing is required for water or water
based fluids. For highly corrosive gases or liquids and for special diaphragms,
contact Inotek)
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Connections: 1/4" NPT high and low pressure taps, duplicated - one pair
top for air and gas, one pair bottom for liquids
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Requires no filling liquid
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