The conductive control level relay L-ED 5 with the conductive probes is used to control 5 levels or to keep between 2 points the level of conductive liquids like water, oil, chemical products, etc., in tanks, deposits, recipients, tubes, etc.

Conductive probes could be supplied under request.

The conductive level indicator L-ED 5 bases its work in the conductivity of the liquids to control. They have 5 function LEDs associated with a relay. They can work independently or related.

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 relay operates when the liquid reaches any level electrode probe and illuminates its LED channel. The relay releases pressing RESET button. If the RESET button is pressed meanwhile the liquid covers a probe, the relay releases and will be activated when the button wil be unpressed.

If the RESET button is pressed meanwhile there are two or more active channels, the relay will not be disengaged until all channels will be inactive.

If there is no supply meanwhile the liquid covers any probe, the relay releases and the LED switch off, turning back when it will be supply.

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-ED-5 – ref: 2750-5-230...
Suppyl voltage230 V AC (50 – 60 Hz)
Power consumption1,6 VA
Galvanic isolationYes
Max. cable section Ø 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.
Maximum cable length100 m, without shielding
(depending on cable type and the application)
Relay output AC mod. for load:Resistive 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
Weight0,27 Kg
Current in probes line0,155 mA
Voltage in probes line6,2 V AC
Insulation voltage2.500 V AC
Insulation resistance>106 MΩ
Mechanical life30x106 operations
Sensitivity:7 – 100 kΩ
LED visorLexan

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