Flow Ctrl Tech Engineering

Analog Bar Graphs vs Digital Numbers: Human Perception on Industrial Touchscreens

Why displaying numbers as raw digital text increases operator cognitive strain: designing moving-pointer analog scales, normal operating bands, and warning thresholds.

  • Reading a digital number requires cognitive decoding; reading an analog bar allows instant pre-attentive visual processing.
  • Displaying a shaded green/gray band showing the normal operating zone allows operators to spot drifts seconds before alarms trip.
  • Reserve raw numbers for calibration setpoints, piece counts, and exact laboratory batch weighing.

Flow Ctrl Tech Engineering: Turnkey industrial automation, PLC programming, SCADA development, HMI, fieldbuses, and IIoT architectures. Contact our engineering center at [email protected] or phone +91 91110 91005.