KOBOLD Instruments Inc • 1801 Parkway View Drive • 15205 Pittsburgh, PA • Tel: +1 412 788 2830 • E-mail: Please activate JavaScript visit koboldusa.com

s4-don-mech.png: Positive Displacement Oval Gear Flow Meter - Mechanical counter DON-...M

Positive Displacement Oval Gear Flow Meter - Mechanical counter DON-...M

For low and high viscous liquids

Measuring range: 1 - 40 ... 150 - 2500 l/min liquid
Viscosity range: up to 1000 000 cP
Connection: G ½ ... G 4 female thread,
flange DN25 ... DN100, ASME 1 ... 4"
Material: aluminum, stainless steel
pmax: 400 bar
tmax: 120°C
Accuracy: ±0.2 ... 1 % of reading
Counter, display

Video showing resetting of Grand Totaliser


Video showing change of flow direction of mechanical counter



application/pdf; charset=binary


422 KB

Principle of Operation

Oval gear flowmeters are categorised as positive displacement flow technology. When liquid flows through this type of positive displacement flowmeter, 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 process 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.

Other Members of the KOBOLD group

Products by Keyword

By using this website you consent to the use of cookies. Further information can be found in our data privacy statement.