The conductive control level relay L-EPD with the conductive probes is used to keep the level in a deposit according to the level of a well.

Conductive probes could be supplied under request, as well as the undecal socket for the mounting in a DIN rail.

The conductive level indicator L-EPD bases its work in the conductivity of the liquids to control.

It is necessary an electrode or a probe for each level and a common electrode. If the tank is conductive, it could be used as the common electrode.

The deposit relay operates when the liquid reaches the probes of the well activating the pump that fills the deposit until the level of liquid reaches the maximum probe and the relay releases. The relay will not operate until the level of liquid goes below the minimum electrode probe. If the level of liquid goes below the minimum level of the well while the pump is activated, it stops. When the level of liquid reaches up to the well probe, it releases again.

It is simple: the device has to be installed in a DIN rail using the undecal socket. The connection of the probe/s depends on each application and the requested models of the probes.


Approximate measures given in mm.

Technical data

NameLevel control relay
TypeL-EPD – ref: 2750-2...
Supply voltage:
2750-2-230230 V AC (50 – 60 Hz)
2750-2-115115 V AC (50 – 60 Hz)
2750-2-02424 V AC (50 – 60 Hz)
Power consumption3.2 VA
Galvanic isolationYes
Max. cable sectionØ 1 – 2,5 mm2 of a good insulation cable and normally without shielding. If the cable are connected in parallel, it is recommended the installation of shielded cable and with earth connection. The minimum insulation resistance should be minimum 200 kΩ.
Max. cable length150 m, without shielding
(depending on cable type and the application)
Relay output AC mod. for loadResistive AC 10 A / 250 V
Resistive DC 0,4 A / 200 V, 10 A / 24 V
Inductive AC 5 A / 250 V
Inductive DC 5 A / 24 V
Function statusRelay engaged: red LED
Under voltage: green LED
Ambient temperature-20° C – +50° C
Relative humidity30 % – 85 % HR
ProtectionIP20B according to DIN EN60529
Weight0,28 Kg
Current in probes line 4 mA
Voltage in probes line24 V AC
Insulation voltage2.500 V AC
Insulation resistance>104 MΩ
Mechanical life30x106 operations
Sensitivity7 – 100 kΩ
LED visorLexan

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