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  • Gage / Switches - Dial
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    Calibration Services
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    Series MP
    Compact, Low Cost Switch/Gage Mini-Photohelic® Differential Pressure Switch/Gage combines the differential pressure gage with two SPDT switching set points. Designed to measure and control positive, negative, or differential pressures.
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    Series 3000MR/3000MRS
    Combines Differential Pressure Gage with Low/High Set-Points, Compact Size Photohelic® Switch/Gage combines functions of a precise, highly repeatable differential pressure switch with a large analog pressure gage. Applications include air conditioning systems and pneumatic conveying.
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    Series A3000
    3-in-1 Indicating Gage, Lo-limit and Hi-limit Control Photohelic® Pressure Switch/Gage functions as versatile, highly repeatable pressure switch combined with a precise pressure gage. Applications include air conditioning systems, clean rooms, and fume exhaust systems.
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    Series 43000
    Lo-Limit and Hi-Limit Control, Aluminum or Brass Case Available Capsu-Photohelic® Pressure Switch Gage is versatile and combined with a precise pressure gage employing the Magnehelic gage design. Ideal for control of pumps.
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    Series AT-3000MR/MRS
    3000MR or 3000MRS Series in Flameproof ATEX/IECEx Enclosures ATEX/IECEx Approved Photohelic® Switch/Gage combines the functions of a precise, highly repeatable differential pressure switch with a large easy-to-read analog pressure gage.
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    Series AT-A3000
    Photohelic® Switch/Gages in Flameproof ATEX/IECEx Enclosures The flameproof and precise pressure switch/gage measures and controls positive, negative or differential pressures of air and compatible gases.
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    • Most Popular
    • Questions
    • Videos

    Most Popular

    Series A3000
    Series 3000MR/3000MRS
    Series MP
    Series 43000

    Questions

    Question
    What restrictions, if any, are imposed for the Magnehelic® and Photohelic® gages in vacuum service?
    Answer
    In applications involving higher vacuums than 20" Hg, leakage due to gage housing porosity becomes the limiting factor.
    Related
    Series MP
    Series 2000-SP
    Series 2000
    Series 3000MR/3000MRS
    Series 605
    Series DCTE
    Series A3000
    Series 43000
    Question
    Will a Dwyer pressure switch be damaged if the pressure exceeding the maximum set-point is applied to the switch?
    Answer
    No. Not unless the maximum pressure rating of the switch is exceeded.
    Related
    Series A-3000
    Series PDPS
    Series 3000MR/3000MRS
    Series ADPS/EDPS
    Series 1900
    Series 1800
    Question
    What is an RMR Photohelic®?
    Answer
    The RMR option is for a remote mounted relay, where the relay pack is seperate from the gage. The unit comes with a standard interconnecting cable that is 3 feet long.
    Related
    Series A3000
    Question
    What is the NEMA rating of a Photohelic®?
    Answer
    Our standard is considered to be NEMA 1 rated for general purpose. We do have weatherproof (NEMA 4X) and explosion-proof (NEMA 7 & 9) enclosures available.
    Related
    Series 3000MR/3000MRS
    Series A3000
    Series 43000
    Question
    Are air velocity scales available?
    Answer
    Yes, the information we require to supply the proper range is the velocity (fpm or m/s) or velocity pressure (inches of water or kpa) and density of air (lb/ft3 or g/cm3).
    Related
    Series A3000
    Series 2000

    Videos

    Liquid in your Housing? How to Prevent Conduit Condensation
    Custom Reading Velocity and Flow Scales on Differential Pressure Gages
    Pressure Sensor Accuracy Overview
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