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Dwyer Series 3000 Photohelic pressure switch/gage (New/Open package), US $89.99 – Picture 0
Dwyer Series 3000 Photohelic pressure switch/gage (New/Open package), US $89.99 – Picture 1
Dwyer Series 3000 Photohelic pressure switch/gage (New/Open package), US $89.99 – Picture 0
Dwyer Series 3000 Photohelic pressure switch/gage (New/Open package), US $89.99 – Picture 1

Dwyer Series 3000 Photohelic Pressure Switch/gage (new/open Package)

US $89.99

  • Flushing, Michigan, United States
  • Jan 29th
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Dwyer Photohelic Pressure Switch / Gage - Series 3000 Model: 3025 New/Old stock - Open Package Photohelic® Switch/Gages function as versatile, highly repeatable pressure switches combined with a precise pressure gage employing the time-proven Magnehelic® gage design. The Photohelic® switch/gage measures and controls positive, negative or differential pressures of air and compatible gases. Standard models are rated to 25 psig (1.7 bar) with options to 35 (2.4) or 80 (5.5 bar) psig. Single pressure 36000S models measure to 6000 psig (413 bar) with a 9000 psig (620 bar) rating. Two phototransistor actuated, DPDT relays are included for low/high limit control. Easy to adjust set point indicators are controlled by knobs located on the gage face. Individual set point deadband is one pointer width - less than 1% of full scale. Set points can be interlocked to provide variable deadband - ideal for control of fans, dampers, etc. Gage reading is continuous and unaffected by switch operation, even during loss of electrical power. Choose from full scale pressure ranges from a low 0-.25" (0-6 mm) w.c. up to 30 psi (21 bar); single positive pressure to 6000 psig (413 bar). Photohelic Sensing - How It Works In typical applications, these Dwyer switch/gages control between high and low pressure set points. When pressure changes, reaching either set point pressure, the infrared light to the limiting phototransistor is cut off by the helix-driven light shutter. The resulting phototransistor signal is electronically amplified to actuate its DPDT slave relay and switching occurs. Dead band between make and break is 1% of full scale or less - just enough to assure positive, chatter-free operation.
Condition New other (see details) :
A new, unused item with absolutely no signs of wear. The item may be missing the original packaging, or in the original packaging but not sealed. The item may be a factory second or a new, unused item with defects. See the seller’s listing for full details and description of any imperfections.
Seller Notes “New/Old stock - Open package”

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