Kobold Duk-21n4gs300l | Weatherproof Ip65 | Meters | Controlsystemsusa
Process Control Instrumentation, Field Devices and Industrial Automation

KOBOLD   DUK-21N4GS300L

KOBOLD DUK-21N4GS300L
  • DESCRIPTION
  • FEATURES
  • SPECIFICATIONS
  • LITERATURE
Kobold DUK Compact Ultrasonic Flowmeter for measuring, monitoring, metering, and batching of low viscosity liquids. High Temp Brass housing. Switching, frequency or analog outputs available. Up to 230 PSI. IP65.

DUK-21N4GS300L
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Connection
Output/Electronic
Flow Direction

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  • Measuring Ranges: 0.02...5 GPM to 0.6...160 GPM
  • Accuracy: ±0.7 % of Reading + ±0.7% of F.S.
  • Turndown Ratio: 250:1
  • Pmax : 230 PSI; T max : 194° F
  • Connections: 1⁄2"...3" NPT or G Thread
  • Material: Brass or 316 Stainless Steel
  • Outputs: Analog, Frequency, Switching, Compact Electronics with Digital Displays, Batching and Totalizing Electronics

The KOBOLD model DUK flow meters are used for measuring, monitoring, metering, and batching of low viscosity liquids. They are highly repeatable, feature a small pressure loss, and offer measurement independent of density and temperature changes. The devices work on the principle of run time difference. Ultrasonic waves in the media are influenced by the rate of flow. Two sensors mounted opposite one another in the pipeline function simultaneously as transmitter and receiver of the ultrasonic signals. If there is no flow, the run times of both signals are identical. If the media is flowing, then the run time of the signal against the flow is longer than the signal with flow. The run time difference, which is determined by a microprocessor, is proportional to the rate of flow.

The devices can be equipped with a switching output, a frequency output, or an analog output. In addition, a compact electronic 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 batching or totalizing electronic. The meter electronic indicates the momentary flow rate in the first line of the display and the partial or total flow in the second line. A batching electronic 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. Common applications include: machine building, automotive, robotics, cooling, and hot water.

Technical Details
Measurement PrincipleUltrasonic
Media:Water or Solutions with a Minimum of 60% Water Content, Max. 1 % Solid
Viscosity:Max. 3 cSt
Accuracy:+/-0.7% of Reading + +/-0.7% of F.S.
Repeatability:+/-0.1% of F.S.
Mounting Position:Universal: Flow in Direction of the Arrow (Horizontal: Electronic on Top or Below)
Straight Piping:10 x Pipe Diameter In/Out
Media Temperature:-4...194 °F
Ambient Temperature:-4...158 °F
Response Time:Approx. 0.5...1 s (Depending on Electronic Version)
Max Pressure:230 PSI
Pressure Loss:Max. 2.2 PSI at F.S.
Protection:IP 65
Wetted PartsSensor Housing: Brass or 316 Stainless Steel
Sensors: PEEK
Seal:NBR (Others upon Request)
ModelMeasuring Range "G" (GPM)Measuring Range "H" (LPM)Size (NPT/G)DUK-...S30x
DUK-...F3x0
DUK-...Lx43
DUK-...C3xxDUK-...Ex4R
DUK-...Gx4R
DUK with ADI 24 V DCDUK with ADI 230 / 115 V AC
DUK-xxx40.02...50.08...201⁄21.87 LB2.31 LB2.20 LB4.74 LB5.95 LB
DUK-xxx50.04...100.16...403⁄42.31 LB2.76 LB2.65 LB5.18 LB6.39 LB
DUK-xxx60.06...160.25...6313.20 LB3.64 LB3.53 LB6.06 LB7.28 LB
DUK-xxx80.16...400.6...15011⁄25.18 LB5.62 LB5.51 LB8.05 LB9.26 LB
DUK-xxx90.25...651...25028.38 LB8.81 LB8.71 LB11.24 LB12.46 LB
DUK-xxxB0.6...1602.5...630315.65 LB16.09 LB15.98 LB18.52 LB19.73 LB

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