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    Series 668B/D Compact Differential Pressure Transmitters

    Compact Differential Pressure Transmitters
    Ranges from 0.1 to 100 in w.c., Overpressure Protection to 15 psig, ±0.8% Accuracy

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    Series 668B/D Compact Differential Pressure Transmitters

    Ranges from 0.1 to 100 in w.c., Overpressure Protection to 15 psig, ±0.8% Accuracy

    Our low cost SERIES 668B/D Compact Differential Pressure Transmitters are capable of sensing differential gage pressure with ±0.8% FS accuracy, and converts this pressure difference to a proportional high level analog output for both unidirectional and bi-directional pressure ranges. These transmitters can withstand up to 15 psig overpressure with no damage to the unit. The compact, lightweight design makes installation simple and easy. Units are protected against incorrect wiring, and include a protective terminal cover.

    Product Applications

    • HVAC & VAV control
    • Clean rooms & isolation rooms
    • Duct static pressure measurement
    More Information
    Model Chart
    EXAMPLE 668 B 04 1 Series 668B-04-1-1 Differential Pressure Transmitter, front connection, 0-1” w.c., 4 to 20 mA
    SERIES 668        
    CONNECTION   B
    D    		     Front
    Bottom
    RANGE     01
    21
    02
    22
    03
    04
    05
    06
    07
    08
    09
    10
    12
    13
    14
    15
    16
    17
    18
    19    		   0 to 0.1” w.c.
    0 to 0.2” w.c.
    0 to 0.25” w.c.
    0 to 0.4" w.c.
    0 to 0.5" w.c.
    0 to 1.0" w.c.
    0 to 2.5" w.c.
    0 to 5.0" w.c.
    0 to 10" w.c.
    0 to 25” w.c.
    0 to 50” w.c.
    0 to 100” w.c.
    0.1-0-0.1” w.c.
    0.25-0-0.25” w.c.
    0.5-0-0.5” w.c.
    1-0-1” w.c.
    2.5”-0-2.5” w.c.
    5-0-5” w.c.
    10-0-10” w.c.
    25-0-25” w.c.
    OUTPUT       1
    2
    3    		 4 to 20 mA
    0 to 10 VDC
    0 to 5 VDC
    Service: Air and non-conductive gases.
    Accuracy: ±0.8% FS.
    Temperature Limits: Operating: 0 to 170°F (-18 to 77°C); Storage: -40 to 185°F (-40 to 85°C).
    Pressure Limits: 15 psig (1.0 bar).
    Thermal Effects: 0.03% FS/°F (±0.054% FS/°C).
    Compensated Range: From 40 to 170°F (4.4 to 77°C).
    Power Requirements: 12 to 32 VDC.
    Output Signals: 4 to 20 mA (2-wire), 0 to 10 VDC (3-wire), or 0 to 5 VDC (3-wire).
    Zero Adjustment: Accessible under the small terminal cover.
    Electrical Connection: Terminal strip.
    Process Connection: 3/16" OD barbed brass for 1/8" ID push-on tubing.
    Enclosure: Stainless steel and PC+ABS alloy, UL 94 V-0 rated.
    Weight: 4.0 oz (113 g).
    Agency Approvals: CE.
    • Protection from 15 psi overpressure & incorrect wiring
    • High accuracy at low pressure ranges
    • Two package selections allows easy device mounting to best fit application pressure connections