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Dwyer 641-12-LED Air Velocity Transmitter

The Series 641 Air Velocity Transmitter is the ideal instrument for monitoring air flow. This transmitter uses a heated mass flow sensor which allows for precise velocity measurements at various flow rates and temperatures.

  • Accuracy: 3% FS Process gas: 32 to 122 F
  • Outputs: 4-20 mA
  • Power Requirments: 12 to 35 VDC, 10 to 16 VAC
  • Current Consumption: 300 mA max
Price: $852.55
    Part# 641-12-LED
    ServiceClean air and compatible, non-combustible gases
    Accuracy3% FS Process gas: 32 to 122 F
    Response TimeFlow: 15 s to 95% of final value (output filter set to min)
    Temperature LimitsProcess: -40 to 212 F (-40 to 100 C) Ambient: 32 to 140 F (0 to 60 C)
    Pressure Limit100 psi (689 bar) maximum
    Humidity LimitNon-condensing
    Power Requirments12 to 35 VDC, 10 to 16 VAC
    Output FilterSelectable 05-15 s
    Loop Resistance600 Ω max
    Current Consumption300 mA max
    Outputs4-20 mA
    Electrical ConnectionsScrew terminal
    Mounting OrientationUnit not position sensitive Probe must be aligned with airflow
    Display4-1/2 digit 1/2" red LED
    Resolution1 FPM, 001 MPS (10 FPM @ 10,000 and 15,000 FPM ranges)
    ApprovalsCE, RoHS
    Downloads