Dwyer Photohelic (Magnehelic) Pressure Switch/Gage A3002-TP-24V

Best Sellers
1	3-LED Strip Red 624nm, 750 mcd 12v DC 90mA
2	3mm UV LED 12000 uW (CREE Chip) 20mA "MegaStrong"
3	New EPSON AC Adapter 5VDC, 1.5 Amps, Model EU-30
4	2N3904, NPN Transistor TO-92 Package
5	3-LED White Waterproof Strip 6000~10000K, 3750mcd 12v DC

Home > Industrial > Process Controls

Item Id: Dwyer_A3002

Email this page to a friend

Review this item

Price

Retail Price: $239.00

Your Savings: $144.00

Your Price:

$95.00

Availability:

Quantity

Description

Dwyer Photohelic (Magnehelic) Pressure Switch/Gage A3002-TP-24V

Item Description, Features, and Specifications:
This is a new in the unopened box (one box opened for photos only...), Dwyer Photohelic (Magnehelic) Pressure Switch/Gage model A3002-TP-24V.
The range on this model is 0~2.0 inches of water.

According to Dwyer...
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.
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.

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.

Specifications:
Range: 0~2.0" water column
Supply Voltage: 24v DC

Specs for the Series 3000 switches here.

Item Condition:
Surplus, new in the box
Item is sold "as is"

Testing Done:
No testing done

You will Receive:
(1) Dwyer Photohelic (Magnehelic) Pressure Switch/Gage A3002-TP-24V

Item Weight:
Item weight is approximately 4.4 pounds.