Series AT-A3000 ATEX/IECEX Approved Photohelic Pressure Switch/Gauge

Photohelic® Switch/Gauges in Flameproof ATEX/IECEx Enclosures

Flameproof approved Series AT-A3000 ATEX/IECEx Approved Photohelic® Pressure Switch/Gauge functions as versatile, highly repeatable pressure switch 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. Two photo-transistor 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 which is ideal for control of fans, dampers, etc. Gauge reading is continuous and unaffected by switch operation, even during loss of electrical power. Flameproof enclosures are available in aluminum with a glass window which allows for viewing of set point needles and process pressure.

Important notes for installation:

• Cables must be fitted through 1/2″ NPT cable gland or ATEX/IECEx conduit (not supplied with instrument).
• Make sure after cabling to close tight cover and cable gland, in order to maintain IP66 rating.
• Open cover only after de-energizing instrument.

Attention: Check local safety rules and warnings on unit and manual for a correct use of the instrument in hazardous areas.