DUK Ultrasonic Flowmeter

Brand: KOBOLD Instruments, Inc.

The new KOBOLD type DUK Flow Meters are used for the measurement, monitoring, metering and dosing of low viscosity fluids. The devices work on the principle of the difference in running times.

This is based on the fact that ultrasonic waves in a medium are influenced by the speed of flow. Two sensors mounted opposite one another in the pipeline function simultaneously as transmitter and receiver of ultrasound signals.

If there is no flow, then the running times of both signals are identical. If the medium is flowing, then the running time of the signal against the flow is longer than that with the flow.

The running time difference, which is determined by a microprocessor, is proportional to the speed of flow. The devices can be equipped with a switching output, a frequency output or an Analog output.

In addition, a compact circuit can be selected that features a digital display, a switching output and an Analog output.

The device series is rounded off by an optionally available dosing and meter circuit. The meter circuit indicates the momentary flow rate in the first line of the display and the partial or total quantity in the second line.

A dosing circuit controls simple filling tasks and similarly measures flow rates, total amounts and filling amounts. The Analog output and two relay outputs can be used for further processing of the signals.

Specifications

Accuracy

  • ± 0.1 % of Full Scale - High Repeat Accuracy
  • 0.7 % of Full Scale
  • 0.7 % of Reading

Ambient Temperature Range

  • -20° to 70° C (-4° to 158° F)

Applications

  • Automotive
  • Cooling Circuits
  • Hot Water
  • Machine Building
  • Robotics

BSP Connection

  • G 1" Female
  • G 1/2" Female
  • G 1-1/2" Female
  • G 2" Female
  • G 3" Female
  • G 3/4" Female

Consumption

  • 100 mA Approximately - Compact Electronics
  • 170 mA Approximately - Dosing & Counter Electronics
  • 25 mA
  • 30 mA
  • Maximum

Display

  • 2 × 8-Digit LCD Display - Counter Electronics
  • 3-Digit LED Display - Compact Electronics
  • 5-Digit Digital Display - ADI Electronics
  • Bar Graph - ADI Electronics
  • LED Display

Electrical Connectors

  • Cable
  • Cable Gland
  • DIN 43650
  • M12 Plug, 5-Pin
  • Plug Connector M12×1
  • Pluggable Terminal Block

Electrical Contacts

  • N/O or N/O Programmable - Compact Electronics

Enclosure, Body Material

  • 316 Stainless Steel
  • Brass

Environmental Protection

  • IP65

Flow Rate

  • 0.08-20 to 2.5-630 L/minute

Frequency

  • 50 to 1,000 Hz
  • 500 Hz

Function

  • Flow Monitor
  • Language
  • Minimum/Maximum
  • Monitoring for Part
  • Reset
  • Total Quantity

Load Limit

  • 500 ohms, Maximum

Maximum System Pressure

  • psi: 232.1 (kPa: 1,600, bar: 16)

Media

  • Liquids With, Maximum

Mounting Position

  • In All Directions, Flow in Direction of the Arrow (Horizontal: Electronic on Top or Below)

NPT Connection

  • 1" NPT Female
  • 1/2" NPT Female
  • 1-1/2" NPT Female
  • 2" NPT Female
  • 3" NPT Female
  • 3/4" NPT Female

Output

  • 0-10 Vdc - Analog (ADI Electronics)
  • 1 A at 30 Vdc - Relay SPDT (Switching Output)
  • 2 A at 30 Vac/Vdc, Maximum
  • 200 mA - Maximum
  • 24 Vdc Active - Switching Output
  • 4-20 mA, 3-Wire
  • 60 VA at 30 Vac/Vdc, Maximum
  • Open Collector - Impulse Output
  • PNP - Impulse Output

Output Format

  • PNP or NPN Semiconductor - Compact Electronics

Output Function

  • Normally Closed
  • Normally Open

Power Requirement

  • 100-240 Vac ± 10 %
  • 10-40 Vdc
  • 18-30 Vac
  • 24 Vdc ± 20 %

Pressure Range

  • psi: 0 to 232.1 (kPa: 0 to 1,600, bar: 0 to 16)

Process Temperature

  • -20° to 120° C (-4° to 248° F)

Programming

  • 2 Buttons - Compact Electronics
  • 4 Button - Counter, Dosing & ADI Electronics

Relay Output

  • 2 Changeover Contacts
  • 2 Relays

Response Time

  • 0.5 to 1 second Approximately at Flow Change > 10  % of Full Scale

Seat / Seal Material

  • FPM - Wetted Materials
  • NBR - Wetted Materials

Sensor / Probe Material

  • PEEK - Wetted Materials

Sensor / Probe Style

  • Ultrasonic

Span - Minimum

  • 250

Switch Type

  • SPDT

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