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Dwyer Instruments Inc.Series 645 Wet/Wet Differential Pressure Transmitter

Dwyer Series 645 Differential Pressure Transmitter
  • ±0.25% Accuracy
  • Quick Response
  • 4-20 mA Output, Loop Powered

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    Series 645 Wet/Wet Differential Pressure Transmitters designed for use with compatible gases and liquids which can be applied to both the pressure and reference ports. Quick response capacitance sensor delivers a 4 to 20 mA output signal proportional to differential pressure with ±.25% accuracy. The Series 645 transmitters are ideal for process control, filter condition monitoring, refrigeration equipment, pump speed control, HVAC equipment, and liquid level measurement.

    Specifications

    Service: Compatible gases or liquids on both pressure and reference sides.
    Output: 4 to 20 mA, 2-wire.
    Supply Voltage: 11 to 30 VDC.
    Loop Resistance: 0 to 1000 ohms.
    Zero and Span: Adjustable, ±1 mA, non-interactive.

    Max Overload Pressure:
    High side: 1 to 5 psi: 20 x FS, 10 to 25 psi: 10 x FS, 50 psi: 5 x FS, 100 psi: 2.5 x FS.
    Low side: 2-3x FS.

    Temperature Limits:
    Operating: 0 to 175°F (-22 to 80°C), 
    Storage: -65 to 260°F (-54 to 126°C).

    Accuracy: ±0.25% FS (RSS).

    		 Response Time: 30 to 50 msec.
    Thermal Effects: (includes zero and span) ±0.02% FS/°F, 30 to 150°F (-1 to 65°C).
    Wetted Parts: 17-4 PH stainless steel, 300 series stainless steel, Viton and Silicone O-rings.
    Housing: Stainless steel/Aluminum.
    Process Connection: ¼"-18 NPT(F).
    Electrical Connection: Barrier strip terminal block with conduit enclosure and .875" (22 mm) diameter conduit opening.
    Weight: 14.4 oz (0.4 kg).

    645 Dimensions

    Part Numbers

    Part Number
    		 Range
    PSID
    Part Number
    Range
    PSID
    645-1
    645-2
    645-3
    645-4
    645-5
    645-6    		 0 to 2
    0 to 5
    0 to 10
    0 to 25
    0 to 50
    0 to 100    		 645-11
    645-12
    645-13
    645-14
    645-15
    645-16    		 ±1
    ±2.5
    ±5
    ±10
    ±25
    ±50

    Contact Us!

    By Mail:
    John Sherman Agencies Limited
    1641 Venables Street
    Vancouver, British Columbia
    V5L 2H1

    By Phone/Fax:
    Phone: (604) 254-9622
    Fax: (604) 254-3123

    Electronically:
    info@johnsherman.com
     

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