Oil electrical level indicators

with MAX temperature electrical sensor


Oil electrical level indicators
Oil electrical level indicators


Oil electrical level indicators
Oil electrical level indicators


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

Avoid contact with alcohol or detergents containing alcohol.

Screws, nuts and washers

Zinc-plated steel.

Packing rings

Step-shaped for the seal on the reservoir walls and NBR synthetic rubber O-ring under screw head.

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

Sensor bracket

Watertight in glass-fibre reinforced polyamide based (PA) technopolymer, black colour, with MAX temperature sensor (80°C).

For a correct assembly see Warnings.

Swivelling connector

With built-in cable gland and contact holder. Front or axial output (high or low) ensuring protection against water sprays (protection class IP 65 according to table 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

  • HCV-ST-NO: with electric contact normally open (NO).
  • HCV-ST-NC: with electric contact normally closed (NC).

Maximum continuous working temperature

90°C (with oil).

Features and performances

In addition to the visual control, HCV-ST column level indicator, generates an electric signal when the temperature reaches the pre-set degrees (80°C).

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.

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: 18 bar (HCV.76), 18 bar (HCV.127) and 12 bar (HCV.254).

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 MAX temperature sensor

  • HCV-ST-NO: the electrical contact closes when the pre-set temperature is reached at 80°C.
  • HCV-ST-NC: the electrical contact opens when the pre-set temperature at 80°C is reached.
Electrical featuresMAX temperature sensor
Tension feedAC/DC
Electric contacts

NO normally open

NC normally closed

Voltage /

Maximum current

250 Vac - 2 A(resisteve loads)
115 Vac- 3A
24 Vdc - 3 A
12 Vdc - 4 A
Minimum current50 mA
Cable glandPg 7 (for cables in sheath with Ø 6 or 7 mm)
Conductors cross-sectionMax. 1.5 mm2

Special executions on request

  • Level indicators with stainless steel screws, nuts and washers.
  • Level indicators HCV.76 with screws M12.
  • Level indicators for use with fluids containing alcohol.
  • UV resistant transparent technopolymer level indicators.
  • MAX temperature electrical sensor with trigger threshold at 70°C or 90°C.

Connector assembly instructions

  1. Remove the connector from the indicator by unscrewing the set screw placed on the connector, take the contact holders out and loosen the cable gland.
  2. Slip on the cable into the connector (standard connector) and connect the wires to the terminals 3 and earth 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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