Kobold Oscillation Flowmeter, DOG-4
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DOG-4 Oscillation Flowmeter

Brand: KOBOLD Instruments, Inc
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Kobold Oscillation Flowmeter, DOG-4 Kobold Oscillation Flowmeter, DOG-4
The KOBOLD flowmeter DOG-4 is used for flow measurement of gases. The medium flows through an orifice in a tube. Bypass bores are located at the sides. The dynamic pressure at the orifice causes part of the gas volumetric flow to flow into the bypass. 

The division ratio remains constant over the whole measuring range. The bypass channel contains the Oscillator – the Measuring cell itself.

When the gas flows through the measuring cell, a gas column oscillates in a U-shaped channel mounted to the left and right. This oscillation frequency is proportional to the flow velocity and thus to the total volume flow. The oscillation frequency is sensed with a platinum sensor. An electrical alternating signal is generated that is displayed in the series connected electronics.

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Specifications

Brand

Accuracy

  • ± 1.5 % of Measured Value
  • ± 5 % of Measured Value

Ambient Temperature Range

  • -25° to 80° C (-13° to 176° F)

Applications

  • Compressed Air
  • Gases - Biogas, Fermentation Gas, Nitrogen, Propane, Argon
  • Hydrogen Storage
  • Natural Gas

Approvals & Certifications

  • ATEX
  • Ex
  • IEC Ex

Ball Material

  • Stainless Steel

Communication

  • Modbus RTU
  • RS-485 2-Wire

Display

  • Alphanumeric LCD
  • Display with Backlight

Electrical Connectors

  • 4 x M16 x 1.5
  • Cable Gland

Enclosure, Body Material

  • 316 Stainless Steel
  • 316L Stainless Steel
  • Polyamide

Environmental Protection

  • IP20
  • IP65

Flange Size - 1-1/2” (DN 40)

  • 1-1/2” (DN 40) - ANSI Class 150
  • 1-1/2” (DN 40) - ANSI Class 300

Flange Size - 1” (DN 25)

  • 1” (DN 25) - ANSI Class 150
  • 1” (DN 25) - ANSI Class 300

Flange Size - 2” (DN 50)

  • 2” (DN 50) - ANSI Class 150
  • 2” (DN 50) - ANSI Class 300

Flange Size - 3” (DN 80)

  • 3” (DN 80) - ANSI Class 150
  • 3” (DN 80) - ANSI Class 300

Flange Size - 4” (DN 100)

  • 4” (DN 100) - ANSI Class 150
  • 4” (DN 100) - ANSI Class 300

Flange Size - 6” (DN 150)

  • 6” (DN 150) - ANSI Class 150
  • 6” (DN 150) - ANSI Class 300

Flange Size - 8” (DN 200)

  • 8” (DN 200) - ANSI Class 150
  • 8” (DN 200) - ANSI Class 300

Flow Rate

  • 0.12-12 to 60-6,000 m³/hour to Air

Frequency

  • 500 Hz

Gasket Material

  • Klinger SIL C-4265
  • NBR

Materials of Construction

  • Polyphenylene Sulfide - Measuring Head

Mounting

  • DIN Rail
  • Wall Mounted

Orifice Material

  • 316 Stainless Steel
  • 316L Stainless Steel

Output

  • 0.91 mW/°C - Derating
  • 100 mW at 25° C
  • 12-24 V
  • 24 Vdc, PNP - Pulse Output
  • 30 V, Max.
  • 4-20 mA - Analog
  • 50 mA - Max.
  • PNP Pulse

Power Requirement

  • 110 Vac ± 10 %, 50/60 Hz
  • 230 Vac ± 10 %, 50/60 Hz
  • 24 Vac ± 10 %, 50/60 Hz
  • 24 Vdc ± 20 %, (without ATEX)

Pressure Rating

  • psi: 145 to 580.2 (kPa: 1,000 to 4,000, bar: 10 to 40)

Process Temperature

  • -20° to 120° C (-4° to 248° F)

Ratio

  • 1:100 - Span

Repeatability

  • 0.1 % of Measured Value

Sensor / Probe Material

  • Platinum

Documentation

Approvals

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