SMALL-Ex® Volume Flow Measuring

The measuring instruments are designed for use in filled systems with water or emulsion. Depending on the design or application, the measuring instruments can be designed for system pressures up to 400 bar.

For flow measurement of oil, we designed the instrument-series SMALL-Ex® ViscoFlow.

The volume flow measuring instruments can be optionally equipped with a self-illuminated display. For versions with integrated pressure or temperature measurement, up to 3 displays are installed.

For a better opportunity to use, the measuring instrument can be designed with a stepped sensor. The sensor is in a separate housing and is connected with a cable to the evaluating unit, which can be equipped with a display.

In the volume flow measuring instruments SMALL-Ex®, the measured liquid medium flows through a defined housing bore and sets the turbine in motion. The turbine is equipped with five sealed magnets. These magnetic fields are reported by an inductive, non-contact sensor to the electronics and evaluated there. The flow direction is not relevant for these volume flow measuring instruments.
Various mechanical connections are available, such as different threads, staple lock, flange, Victaulic-system or SAE-flange. Due to the construction of the nominal widths DN20 to DN32, several instruments of this size can be mounted together to build a unit.


I Ex ia I Ma
Ex ia I Ma
PO Ex ia I Ma X


BVS 06 ATEX E005 X
IECEx BVS 09.0056X
IECEx TSA 13.0023X
MSHA 18-ISA 150004-0
TC RU C-DE.AA87.B.00727/21

Env. Tempemperature

-50 to +100 °C for Group I
-50 to +80 °C for Group II

Housing material

Stainless Steel, Steel, brass (depending on type)

Gauge accuracy

+/- 0,5% from end-value (higher accuracy on request)


filtered water as well as emulsion up to max. 5%

Illuminated Display



l/min; m³/h; gpm (other units on request)

Output signal

5 – 15Hz
0/4 – 20mA
* – **V (max. 10 V DC, at min. 7,5V power supply)

Nominal voltage

12V DC (7.5 – 14.0 V DC) 3-wire technology
16V DC (9.6 – 16.1 V DC) 3-wire technology
24V DC (14 – 26.6 V DC) 2-wire technology


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Look for operation manuals, certifications, or our catalog as downloads.

Did you know?

This is what one of our displays for our MAGIN-EX® measurement device series looks like.

We also offer control displays for all our other measurement devices and series.