Oscillation Flow Meter for Gases DOG

Kobold Messring's New DOG-6 Oscillation Flow Meter for Gases – Ideal for Both Dry and Wet Gas Flow Measurements

The DOG-6 Oscillation Flow Meter has been expertly designed for accurate and reliable gas flow measurement in both dry and wet gas applications. This versatile flow meter is a perfect fit for various industries, including industrial processes, biogas plants, sewage treatment plants, and hydrogen and gas volume measurement.

For many years, machine and plant operators, as well as customers in the process industry, have trusted the durable and dependable measurement instruments from KOBOLD.

With the latest upgrade to the DOG-6, KOBOLD continues to meet the growing demands of gas flow applications with an innovative solution that surpasses the limitations of its predecessor, the DOG-4.
 

DOG-4 and DOG-6: A Versatile Line for Different Gas Flow Measurements

The predecessor model DOG-4 was specifically designed for measuring dry gases. Now, with the enhanced design of the DOG-6, the measurement of both dry and moist gases is possible.

A significant improvement with the DOG-6 is its ability to handle damp media, for example enabling a natural condensate drainage. Thanks to its robust sensor, it efficiently measures wet gas flow. Additionally, it comes equipped with optional features like a shut-off valve, calibration software, and a flow computer to suit a wide range of customer needs. The DOG-6, for which an individual calibration protocol is provided for each device, can be manufactured as a custom-made product. Its areas of application are extensive, as it is suitable for dry gases, mixed gases, gas mixtures, and moist gases.

The Oscillation Flow Meter for both dry and wet gases
and gas mixtures offers outstanding features and an
unbeatable price/performance ratio
 

The Benefits of the Oscillation Measuring Principle

With this method of flow measurement, a partial flow of the medium is routed through a bypass into the flow oscillator. In the oscillator, which is the actual measuring cell, the medium flows through a chamber with two flow channels. A bluff body directs the flow either to the left or the right. A channel on the side of the bluff body connects both sides. The flow creates positive pressure on one side and negative pressure on the other. This pressure difference redirects the media flow to the other side. The flow begins to oscillate between the two sides and causes the medium in the connecting channel to oscillate.

The frequency of the oscillation is a measure of the flow velocity. A platinum hot-wire sensor detects the oscillation in the connecting channel and converts it into an electrical signal. The signal is processed in the downstream electronics and displayed or output.

Durability and Versatility of the DOG-6 in Challenging Conditions

The DOG-6 is specifically engineered for challenging industrial environments. Its design includes no moving parts, making it extremely robust and resistant to aggressive media, moisture, and dirt particles. Additionally, its installation flexibility allows it to be installed in any position, though KOBOLD recommends horizontal installation for optimal drainage of condensate when dealing with moist gases. This is because the device’s construction facilitates the drainage of condensate from the oscillator, which is further optimized by the inclined measuring head.

This is particularly required when biogas is naturally generated in the fermenter, making the DOG-6 an ideal choice for biogas applications. Its resistance to sulphur is an added advantage. Additionally, it operates efficiently at low pressure, with minimal pressure losses, typically less than 30 mbar.

The DOG-6 is available in a stainless-steel flange design with nominal diameters up to DN 200. A variety of custom-made products are also available. In addition to biogas plants, the DOG-6 oscillation flow meter is highly effective in sewage treatment plants, industrial processes, and hydrogen applications.

Applications for the DOG-6 Oscillation Flow Meter for Gases

The DOG-6 is suitable for wet gas flow measurement in a variety of gases, including compressed air, natural gas, biogas, hydrogen, digester gas, various gas mixtures or for medical and other technical gases such as propane, argon or similar.

Advantages of the DOG-6 Oscillation Flow Meter

The DOG-6 Oscillation Flow Meter is distinguished by its selection of multiple measuring ranges per nominal width, high measuring accuracy, and long-term stability. It holds ATEX/IECEx approvals for use in potentially explosive environments, including zone 0. The device is highly resistant to contamination and operates without wear, making it almost maintenance-free. In the event that the device sensor needs replacement, this can be performed on-site without interrupting the process, thanks to optional shut-off valves. This service process does not require recalibration.

With its extensive measuring range and versatile, individually programmable electronics, the DOG-6 can accommodate a wide variety of gases, including promising energy sources like biogas and hydrogen. A compensation of process changes in pressure and temperature is made possible by the use of a flow computer. The evaluating electronics can measure instantaneous and cumulative flow rates, as well as temperature and pressure via externally connected sensors. Additionally, data storage and communication capabilities can be implemented through various output options.

With all these advantages, the DOG-6 offers an impressive range of applications, durability, and measurement accuracy - all at an unbeatable price. A comparable price-performance ratio is unattainable with alternative ultrasonic technology. 

For more information, please reach out to us.