Listing ID #5332255
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Contact Supplierat3a3000 atex approved photohelic switchÂ
flame-proof atex approved photohelic® switch gages, series at3a3000, function as versatile, highly repeatable pressure switches combined with a precise pressure gage employing the time-proven magnehelic® gage design. the photohelic® switchgage 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 psig (2.4 bar) or 80 psig (5.5 bar). two phototransistor actuated, dpdt relays are included for lowhigh limit control. easy to adjust set point indicators are controlled by knobs located on the gage 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. gage 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.
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important notes for installation: : cables must be fitted through 1/2" npt cable gland or atex conduit (not supplied with instrument),open cover only after de-energizing instrument