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    Series 631B Capsuhelic® Wet/Wet Differential Pressure Transmitter

    Capsuhelic® Wet/Wet Differential Pressure Transmitter
    Ranges Down to 0.5 in w.c. with 500 psi Static Pressure Rating

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    Series 631B Capsuhelic® Wet/Wet Differential Pressure Transmitter

    Ranges Down to 0.5 in w.c. with 500 psi Static Pressure Rating

    The Dwyer SERIES 631B Capsuhelic® Differential Pressure Transmitter monitors differential pressure of air and compatible gases and liquids with accuracy. The design employs converting pressure changes into a standard 4-20 mA output signal for two wire circuits. Digital push-button, zero and span adjustments are easily accessed on the front cover. The Series 631 Differential Pressure Transmitter is designed to meet NEMA 4X (IP66) construction. Robust housing offers 500 psi static pressure rating on ranges down to 0.5" w.c.

    Product Applications

    • Refrigeration Equipment
    • Energy and Water Management
    • Liquid Level in Water Storage Tanks
    More Information
    Model Chart
    EXAMPLE 631B 1 NIST 631B-1-NIST, Wet/wet differential pressure transmitter, range 0-1” w.c., with NIST traceable calibration certificate
    SERIES 631B     Capsuhelic Wet/Wet Differential Pressure Transmitter
    RANGE   0
    1
    2
    3
    4
    5    		   0 - 0.5” w.c.
    0 - 1” w.c.
    0 - 2” w.c.
    0 - 5” w.c.
    0 - 10” w.c.
    0 - 25” w.c.
    OPTIONS     AT
    BUNA
    G
    HC
    M
    NIST
    R
    ST
    SPCL
    VIT
    Y    		 Aluminum Tag
    Buna-N Diaphragm
    Green Scale Overlay
    Horizontal Calibration
    Mirror Scale Overlay
    NIST Traceable Calibration Certificate
    Red Scale Overlay
    Stainless Steel Tag
    Special Cleaning
    Fluoroelastomer Diaphragm
    Yellow Scale Overlay
    Service: Compatible gases & liquids.
    Wetted Materials: Brass, silicone, 300 SS.
    Accuracy: Transmitter Output: ±2% FS (includes linearity, hysteresis and repeatability). Gage: ±3% FS at 70°F (21.1°C).
    Stability: ±1% FS/yr.
    Temperature Limits: 20 to 120°F. (-6.67 to 48.9°C).
    Pressure Limits: -20" Hg to 500 psig (0.677 to 34.4 bar).
    Thermal Effect: 0.025%/°F (0.045%/°C) includes zero & span.
    Power Requirements: 10 to 35 VDC.
    Output Signal: 4 to 20 mA.
    Loop Resistance: 0 to 1250 Ω maximum.
    Electrical Connections: M-12 circular 4 pin connector.
    Process Connections: 1/4" female NPT high and low pressure taps, duplicated - one pair top for air and gas, and one pair bottom for liquids.
    Enclosure Rating: Designed to meet NEMA 4X (IP66).
    Mounting Orientation: Diaphragm in vertical position. Consult factory for other position orientations.
    Weight: 8 lb 4 oz (3.74 kg).
    Agency Approvals: CE.
    • Gage capsule permits high-pressure usage with small differentials
    • Versatile device for liquid or gas supports designs requiring more precise measurements in support of application
    • Zero and range adjustments outside of gage means no disassembly in normal service
    • NEMA 4X rated enclosure provides protection in harsh environments permitting outdoor monitoring or in areas where dust and particulate matter exists