Kobold has on offer the DOE oval wheel flowmeter for low and highly viscous liquids. Featuring a full stainless steel body, and temperature measurement for fuel consumption, the DOE offers different pulse output options including one to measure pulsating flow from e.g. peristaltic pumps. It measures liquids of different viscosities, up to 1000 cP, with an accuracy of 1% of reading under reference conditions.
Principle of operation
Oval gear flowmeters are categorised as positive displacement flow technology. When liquid flows through this type of meter, two oval geared rotors measure a constant volume per rotation within a precisely machined measuring chamber. With each rotation, a constant volume of liquid is measured. The rotation of the oval gears is sensed via magnets embedded within the rotors. These magnets transmit a high resolution pulse output. The output signal can be processed externally via a remote display controller or PLC, or via a variety of output/display options available as accessories attached to the flowmeters.
The positive displacement flow technology allows for precise flow measurement of most clean liquids regardless of the media conductivity. Other liquid properties also have a minimal effect on the performance of this type of meter. Flow profile conditioning is not required as with alternative flow technology options making oval gear installations simple to install in tight spaces and at an economical price.
The DOE finds application for all viscous, non-abrasive clean liquids like petroleum, diesel, oil, grease, pastes, chemicals, inks and water. It is also able to measure the fuel consumption of small aircraft, motor boats and mobile power generators. Stainless steel flowmeters are suited to most products and chemicals, whereas the aluminium meters are suitable for fuels, fuel oils and lubricating liquids. Due to an optional measurement of temperature using PT100, even high accuracy fuel consumption measurements are possible. An overview of the instruments main features includes:
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