Dwyer ATEX 3-in-1 Indicating Pressure Switch / Gauge – Photohelic Series

Item # ATA3000-DWYER Brand: Dwyer Instruments

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** This item has been discontinued. Click here for more pressure instruments.**

This product has been discontinued.

Flame-proof ATEX approved Series AT3A3000 Photohelic Switch/Gauges, function as versatile, highly repeatable pressure switches combined with a precise pressure gauge employing the time-proven Magnehelic gauge design. The Photohelic switch/ gauge measures and controls positive, negative or differential pressures of air and compatible gases. Standard models are rated to 25 PSIG(1.7 bar).

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 gauge face (accessible opening case after de-energizing instrument). Set points can be interlocked to provide variable dead band- ideal for control of fans, dampers, etc.

Gauge reading is continuous and unaffected by switch operation, even during loss of electrical power. Flame-proof ATEX enclosures are available in aluminum with glass window which allows for viewing of set point needles and process pressure.

Features:

  • Mounting Style: Diaphragm in Vertical Position
  • Pressure Rating: 15 PSIG
  • Temp Rating: 20 – 120 F
  • Process Connections: 1/8″ FNPT Brass Ports
  • Material: Aluminum
  • Size: 4″ Dial

Important notes for installation:

  • Cables must be fitted through 1/2″ NPT cable gland or ATEX conduit (not supplied with instrument).
  • Make sure after cabling to close tight cover and cable gland, in order to keep IP66 rating (IP65 with option OPV, overpressure relief valve).
  • Open cover only after de-energizing instrument.
  • PLEASE NOTE: Check local safety rules and warnings on unit and manual for a correct use of the instrument in hazardous area.

 

Applications: Hazardous area pressure measurement and switching; Air conditioning systems; Clean rooms; Fume exhaust systems.

Additional information

Brand Dwyer Instruments
Item Type

Protection

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Voltage

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Range in w.c.

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Rating

Accuracy

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Overpressure Relief Valve

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