SMALL-Ex® Level Measuring

The level measuring instrument is used for level measuring of fluid mediums in tanks or receptacles without inner pressure. The measuring instrument can also be equipped with integrated temperature measuring. They are designed for use in filled systems with fluid medium.  

The gauge accuracy depends on the temperature of the medium and the viscosity. These parameters are each compensated. At the bottom end of the instrument, with or without tube, a piezo-resistive pressure transducer is mounted. Using this construction, any tank or receptacle of any size or depth can be checked and measured. The level measuring can be carried out either by a probe tube, which is inserted into the tank or receptacle from the top or from the side. Or as a screw-in instrument without a probe tube to measure at the bottom of the tank or receptacle.

Customized to the application, variants are available with a straight probe tube as well as a 75° or 90° bent probe tube. Various mechanical connections are available, such as different threads or flange.
The measuring instrument can optional be equipped with an illuminated LCD-display. For more comfortable 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. Level measuring instruments with a flange connection can be designed with a display turned 90° to the front.
If the level measuring instrument is equipped with an integrated temperature measuring, both values can be displayed alternately in a time interval where both measurement signals are continuously transmitted to the control system.


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

Gauge accuracy

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


fluid medium, e.g. water, emulsion, oil

Illuminated Display



mm; m; %; ft (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-wiring technology
16V DC (9,6 – 16,1 V DC) 3-wiring technology
24V DC (14 – 26,6 V DC) 2-wiring technology


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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.