HK Instruments DPT-Flow Series – Flow Transmitter

Features

  • Two field selectable functions:
    • Measure and monitor in-duct volume flow, velocity or differential pressure
    • Measure and monitor air flow 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, psi
  • Unique proportional output options:
    • Volume flow or velocity: voltage (0–10 V) or current (4–20 mA)
    • Pressure: voltage (0–10 V) or current (4–20 mA)
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HK Instruments DPT-Flow is a flow transmitter offering a convenient method for measuring flow rates in centrifugal fans. Versatile across various fan types, it simplifies flow rate measurements in duct systems. Additionally, it comes with the option of including the FloXactTM averaging measurement probe for enhanced accuracy.

Usage

HK Instruments DPT-Flow serves the purpose of measuring air flow in centrifugal fans within air handling units. It functions both as a display unit for on-site monitoring of flow and as a transmitter for controlling air flow in designated fans or blowers.

Moreover, HK Instruments DPT-Flow is adaptable for use within duct systems or air handling units, serving as both a flow display and a transmitter for regulating air flow within ducts. It accommodates various measurement probes like FloXactTM or pitot tubes, as well as air dampers. A prerequisite for its operation is knowledge of the K-value of the measurement probe or damper being used.

Applications

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

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

Specification

Accuracy (from applied pressure): Pressure < 125 Pa = 1 % + ±2 Pa
(models 1000 and 2000) Pressure > 125 Pa = 1 % + ±1 Pa
Accuracy (from applied pressure): Pressure < 125 Pa = 1.5 % + ±2 Pa
(models 5000 and 7000) Pressure > 125 Pa = 1.5 % + ±1 Pa
Zero point calibration: automatic with autozero element (-AZ) or 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: 24 VAC ±10 % / 24 VDC ±10 %
Power consumption: < 1,0 W
Output signals for pressure and air flow (selectable by jumper): 0…10 VDC
4…20 mA
Operating temperature: -20…+50 °C (with autozero calibration -5…+50 °C)
-40…+50 °C (-40C model)
Response time: 1…20 s
Protection standard: IP54

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HK Instruments DPT-Flow Series Flow Transmitter-DpstarGroup

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