Battery Powered Flow Meter – HK Instruments DPT-Flow-Batt Series


  • Two field selectable functions:
    • Measure in-duct volume flow, velocity or differential pressure
    • Measure airflow across centrifugal fans
  • Multiple field selectable measurement units:
    • Volume flow: m3/s, m3/h, cfm, l/s
    • Velocity: m/s, ft/min
    • Pressure: Pa, inWC, mmWC, kPa, mbar

User-friendly on-site display for air flow designed for environments and applications where electricity is not available.

One device is suitable for a range of different fan types. It also provides an easy way to measure flow rate in a duct system for example together with a FloXact averaging measurement probe.


The DPT-Flow-Batt is an on-site display designed for air handling units to measure the air flow on centrifugal fans. The DPT-Flow-Batt can also be used in the duct system as an on-site display for flow. The device can be used with several different measurement probes such as FloXactTM or pitot tube, and air dampers. The requirement is that the K-value of the measurement probe or damper is known.


DPT-Flow-Batt series devices are commonly used in HVAC/R systems for:

  • Air flow monitoring across centrifugal fans and blowers
  • In-duct air flow monitoring


Accuracy (from FS): ±1.5 % (Including: general accuracy, temperature drift, linearity, hysteresis, long term stability, and repetition error)
Zero point calibration: by pushbutton
Measuring units: Pressure: Pa, kPa, mbar, inchWC, mmWC, psi
Flow: m3/s, m3/hr, cfm, l/s, m/s, ft/min
Supply voltage: 9 V battery
Current consumption: ~20 mA on active mode
Operating temperature: -20…+50 °C
Response time: 1.0−10 s, selectable via menu
Protection standard: IP54


HK Instruments DPT-Flow-Batt Series Battery Powered Flow Meter-DpstarGroup