Model 328

SKU: 328

LCD Display, Loop Powered

The Delta Controls Model 328 is a 4-20 mA loop powered, 3.25 digit LCD process variable display. This display has voltage spike protection and is supplied precalibrated at 0% to 100%, but can be field calibrated to engineering units. The reading may be set from 0.0 mA at 4.0 mA up to 19.99 mA at 20 mA. The position in which the decimal point is displayed is chosen by a plug setting on the front of the display body.

The 328 display is a three inch integral potted plug-in module for rough services and will withstand corrosive environments and vibration.


  • Versatile–measures water, sewage, and slurries
  • Improved personnel safety for hazardous places
    such as sewers, pump pits, covered lagoons, etc.
  • Easy pushbutton setup
  • Suitable for most flumes, and weirs


  • Input (Isolated): 4-20 mA dc
  • Max Voltage Drop:7 V
  • Flow Elements Supported: Parshall flume, rectangular weir,
    Cipolletti (trapezoidal) weir,
    V-notch weir, Palmer-Bowlus
    flume, and others
  • Linearization Curve:(Kp-Kh*H)*HKe
  • Accuracy: > 0.125% FS
  • Indication: Flow rate, total flow, input curren
  • Calibration Entry:4 pushbutton entry switches
  • Memory Protection:Non-volatile
  • Wiring Connections:#6 terminal posts, banana plug
  • Ambient Temp Range(Basic Unit):-10 °F to +150 °F
    (-23 °C to 66 °C)
    Scheduled periodic maintenance
    not normally required

Certifications & Approvals

  • Explosion-proof
    Housing Option:
    Third Party Listed by CSA
    NRTL/C (USA and Canada)
    Class I, Groups B, C and D;
    Class II, Groups E, F and G;
    Class III; Encl 4X

Required Ordering Information

  • Detailed model number
  • Tag or nameplate detail (if required)
  • Documentation/testing tiers (if required, refer to Additional Resources in the product catalog)

Additional Information


LCD Display, Loop Powered

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