Dwyer A3003 Series A3000 Photohelic Pressure Switch/Gage, US $55.00 – Picture 0

Dwyer A3003 Series A3000 Photohelic Pressure Switch/Gage, US $55.00 – Picture 1

Dwyer A3003 Series A3000 Photohelic Pressure Switch/gage

US $55.00

Phoenix, Arizona, United States
Jan 29th

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Dwyer Instruments - Series A3000: A3003 Photohelic Pressure Switch/Gage • Air Conditioner Systems • Clean Rooms • Fume Exhaust Systems 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. Two phototransistor actuated, DPDT relays are included for low/high limit control. Easy to adjust setpoint indicators are controlled by knobs located on the gage face. Individual setpoint deadband is one pointer width - less than 1% of full scale. Setpoints 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 up to 0-50"wc; single positive pressure to 6000 psig (413 bar). 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. A plastic housing protects all electronic components. Solid-state and integrated circuit electronics are on glass-epoxy printed circuit boards and self-extinguishing terminal boards. Specifications Gage Specifications Service: Air and non-combustible, compatible gases. Wetted Materials: Call us at (888) 886-8185. Accuracy: ±2% of full scale at 70°F (21.1°C). Pressure Range: 0-3.0" w.c. Pressure Limits: 15 psi. Temperature Limits: 20 to 120°F. (-6.67 to 48.9°C). Process Connections: 1/8" female NPT. Size: 4" (101.6 mm) dial face, 5" (127 mm) O.D. x 8-1/4" (209.55 mm). Weight: 4 lb (1.81 kg). Switch Specifications Switch Type: Each setpoint has 2 Form C relays (DPDT). Repeatability: ±1% of full scale. Electrical Rating: 10A @ 28 VDC, 10A @ 120, 240 VAC. Electrical Connections: Screw terminals. Use 167°F (75°C) copper conductors only. Power Requirements: 120 VAC, 50/60 Hz; 240 VAC & 24 VAC Power optional. Mounting Orientation: Diaphragm in vertical position. Set Point Adjustment: Adjustable knobs on face. Agency Approvals: UL,CSA, CE.

Condition:	New: A brand-new, unused, unopened, undamaged item in its original packaging (where packaging is applicable). Packaging should be the same as what is found in a retail store, unless the item is handmade or was packaged by the manufacturer in non-retail packaging, such as an unprinted box or plastic bag. See the seller's listing for full details. ...	Brand	Dwyer Instruments
Model	A3003