Column level indicators

with MIN level electrical sensor, technopolymer


Column level indicators
Column level indicators


Column level indicators
Column level indicators


Transparent polyamide based (PA-T) technopolymer. Highly resistant to shocks, solvents, oils with additives, aliphatic and aromatic hydrocarbons, petrol, naphtha, phosphoric esters.

Screws, nuts and washers

Zinc-plated steel.

Packing rings

NBR synthetic rubber O-Ring.

Suggested roughness of the packing ring application surface Ra = 3 µm.


Polyamide based (PA) expanded technopolymer, black colour, with a built-in magnetic element to activate the electric contact when the oil level drops to a minimum; alarm threshold located at about 50 mm from the centre of the lower nut (in presence of mineral oil type CB68, according to ISO 3498, at 23°C).

Sensor bracket

Watertight in polypropylene based (PP) technopolymer, black colour, with a built-in relay (reed) with two conductors wired to the two-pin connector.

For a correct assembly see Warnings.

Swivelling two-pin connector

With built-in cable gland and contact holder. Front or side output (right or left) including protection against water sprays (protection class IP 65 according to EN 60529 table-).

Contrast screen

White lacquered aluminium. The housing, in the appropriate external rear slot, guarantees the best protection from direct contact with fluid.

It can be taken out from the inclined side, before assembly to allow the insertion of level lines or words.

Standard executions

  • HCX-E-NO: with electrical contact normally open.
  • HCX-E-NC: with electrical contact normally closed.


When fitting is not possible from the inside of the reservoir and the walls are not thick enough, the screws can be used together with Fast Mounting Kit-.

Maximum continuous working temperature

90°C (with oil).

Features and performances

The column level indicator HCX-E, in addition to the visual control, generates an electric signal when the oil level drops to a minimum.

Ultrasound welding to guarantee a perfect seal.

Maximum fluid level visibility even from side positions.

Lens effect for a better visibility of the fluid level and temperature.

Technical data

In laboratory tests carried out with mineral oil type CB68 (according to ISO 3498) at 23°C for a limited period of time, the weld stood up to 13 bar.

For use with other fluids and under different pressure and temperature conditions, please contact ELESA Technical Department.

In any case we suggest to verify the suitability of the product under the actual working conditions.

Functioning of the MIN level electrical sensor

  • HCX-E-NO: the electrical circuit is closed when the minimum level is reached.
  • HCX-E-NC: the electrical circuit is open when the minimum level is reached.
Electrical featuresMIN level sensor
Tension feedAC/DC
Electric contacts

NO normally open

NC normally closed

Maximum applicable voltage

NO: 150 Vac, 100 Vdc

NC: 150Vac, 150 Vdc

Maximum switching current1 A
Maximum current

NO: 1A

NC: 2A

Maximum switching power

NO: 10 Va

NC: 20 Va

Cable glandPg 7 (for cables in sheath with Ø 6 or 7 mm)
Conductors cross-sectionMax. 1.5 mm2
Do not mount this indicator in proximity to magnetic fields.

Special executions on request

  • Level indicators for use with fluids containing alcohol.
  • UV resistant transparent technopolymer indicators.

Two-pin connector assembly instructions

  1. Remove the connector from the indicator by unscrewing the set screw placed in the bottom, take the contact holder out and loosen the cable gland.
  2. Slip on the two-pole cable into the connector (standard connector) and connect the wires to the terminals nr. 1 and nr. 2 of the contact holder.
  3. Assemble by pressing the contact holder into the connector in the required position.
  4. Screw the connectors to the indicator and then tighten the cable glands.


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