SMALL-Ex® Level Measuring diff. pressure

This specialized level measuring device has been developed especially for the use in pressurized tanks. Two pressure sensors separately monitor the level and the internal pressure of the tank, ensuring an exact measurement independent of the internal pressure that may be inside the tank up to a maximum of 1 bar.

A pressure sensor is installed at the top of the device and evaluates the level of liquid in the tank. On tanks that have an internal pressure fluctuations (e.g., poor ventilation or fluid back flow), over-pressurization may take place that will affect the measurement. To compensate for this, a second pressure sensor monitors the internal tank air pressure and calculates this internally.  The internal communication through the data BUS calculates both measured values and a precise measuring result, independent of the surrounding pressure, is transferred to the device.

Using this measuring method, it is possible to achieve precise measurements under heavy-duty operation. Susceptible mechanics are excluded.


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, % oder nach Kundenwunsch (auf Anfrage)

Output signal

mm; m; %; ft (other units on request)

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


Discover more about Grünewald

We are teamplayers

Discover more about our team and their expertise in measurement technology

Our downloads

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.