Dwyer Instruments has announced the availability of its flameproof approved Series AT-A3000 photohelicpressure switch/gauge.
It functions as a 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-energising 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
Learn more about the Series AT-A3000 at:
https://www.dwyer-inst.com/Product/Pressure/DifferentialPressure/Gage-Switches-Dial/SeriesAT-A3000