Dwyer's Series AT23000MR and AT23000MRS Photohelic switches/gages combine the functions of a differential pressure switch with an analog pressure gage

Dwyer Instruments' Series AT23000MR and AT23000MRS ATEX-approved Photohelic switches/gages are designed to combine the functions of a differential pressure switch with an analog pressure gage. Gage reading is engineered to be unaffected by switch operation and will indicate accurately even if power is interrupted. The AT23000MR Series employs electromechanical relays with low amperage ratings. For applications requiring high cycle rates, the company reccomends the AT23000MRS models with SPST (NO) solid state relays. Set point indicators are engineered to be controlled by knobs located on the gage face (accessible opening case after de-energizing instrument). All models are built to provide both low and high limit control. Compatible with air and other non-combustible, non-corrosive gases, they are made to be used in systems with pressures to 25 psig (1.725 bar). Optional construction is available for use to either 35 psig (2.42 bar) or 80 psig (5.51 bar) as well as an over pressure relief valve. Flame-proof ATEX enclosures are available with glass window, which allows for viewing of set point needles and process pressure.
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