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

don-durchfluss.png: Positive Displacement Oval Gear Flow Meter DON

Positive Displacement Oval Gear Flow Meter DON

For low and high viscous liquids

Measuring range: 0.5 - 36 l/h ... 150 - 2500 l/min liquid
Viscosity range: up to 1000 000 cP
Connection: G ... G 4 female thread,
flange DN25 ... DN100, ASME 1 ... 4"
Material: aluminium, stainless steel
pmax: 400 bar
tmax: 150 °C
Accuracy: ±0.2 ... 1 % of reading
Pulse output, analogue output, contacts, digital / pointer indicator, batcher, counter

DON - Pulse Output

DON - Pulse Output

DON-...ZOK - Digital display

DON-...ZOK - Digital display

DON-...M - Mechanical Counter

DON-...M - Mechanical Counter


application/pdf; charset=binary


423 KB

Operating Instructions

application/pdf; charset=binary

DON - Operating Instructions

7,3 MB


application/pdf; charset=binary


II 2 G Ex db IIC T4/T6 Gb
I M 2 Ex db I Mb

2,3 MB
application/pdf; charset=binary

IECEx DEK 15.0046X

Ex db IIC
Ex db I Mb

567 KB
application/pdf; charset=binary

PESO P503876/1

Ex db IIC T4/T6 Gb

127 KB


application/pdf; charset=binary

Statement of conformity

1,8 MB

Service Videos DON-...M

Video showing resetting of Grand Totaliser

Video showing change of flow direction of mechanical counter


Principle of Operation

Oval gear flow meters are categorised as positive displacement flow technology. When liquid flows through this type of positive displacement flow 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 process externally via a remote display controller or PLC or via a variety of output/display options available as accessories attached to the flowmeters.

Other Members of the KOBOLD group

Products by Keyword

Cookies & Features

This website uses cookies to provide content and features. Details of the technologies used can be found in our privacy policy.

Essential Cookies

Session data such as language selection or spam protection - you can't do without it.

Google Services

Some pages on this website load content from Google Maps and YouTube.