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DOG-4 Oscillation Flowmeter
Brand: KOBOLD Instruments, Inc
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.
Specifications
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
