The pneumatic level controller is used to control 1 level in liquids at atmospheric pressure. Model certificated for use in potentially explosive Gas atmospheres hazardous areas.

Besides liquids can control fluid mixtures that allow the tube to be cleaned after the level of mixture downs.

The liquid or mixture that is controlled must not emit vapours that rarify the entrapped air inside the tube. This could be provoke a misfunction of the device.

The controllers bases their function on the pneumatic outline. The controllers have an electric microswitch activated due to a membrane sensitive to pressure.

The action on the microswitch is carried out by the pressure of the air column entrapped inside the tube and the pressure chamber. Depending on the model, a water height of +100 mm WG is sufficient to trigger the switch.

Make a hole wide enough to introduce the tube or fix it with the mounting accesory usuable.

Ensure of the water-tightness of the unions. Do not use tow or Teflon tapes, only screw the tube to the housing up to the base gasket.

In lateral mounting, ensure of a minimum height of the tube of 200 mm minimum after the elbow.


Approximate measures given in mm.

Technical data

NamePneumatic controller
TypeL-30 ATEX – ref: 2401-A-030
Gas+DustATEX II 1/2G Ex ia IIB T4 Ga/Gb o II 2G Ex ia IIC T4 Gb
ATEX II 2D Ex ia IIIB T135º C Db
Type of signalSingle signal
Actuating pressure+100 mm WG above the tube inlet,
±20 mm WG
Tank pressureAtmospherical
Maximum pressure+0,5 bar
Cable entryM16 cable gland
Electric microswitch:
Capacity of the contactUi= 24/30 V; Ii= 100 /60 mA;
Li=0 mH; Ci= 0 nF
Switching function1 NO + 1 NC
Ambient temperature-20° C – +85° C
Process protectionM10x1 male
ProtectionIP65 according to DIN EN60529
Weight 0,25 Kg
Pressure chamber (base) Parylene with Silicone
Base gasketEPDM

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