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GN 656.1 Oil Level Indicators with Electrical Oil Level Monitoring, Lateral Plug


GN 656.1 Oil Level Indicators with Electrical Oil Level Monitoring, Lateral Plug
ELESA original design
code: HCV-E

Product description


With oil level indicators GN 656.1, the fluid level can not only be viewed, it can also be monitored using an electric contact.

A float with a magnet is located within the indication range which closes or opens a contact at a certain fluid level (REED switch).

The table values for the maximum allowable pressure are based on the use of mineral oil (according to ISO 3498) at a temperature of 23 °C. Use under different conditions will influence the compressive strength and requires prior consultation.


Plastic housing
Crystal-clear polyamide (PA-T)

  • Aging resistant
  • High mechanical strength
  • Temperature resistant up to 90 °C
  • Solvent resistant,
    but not alcohol resistant
  • Avoid contact with hot water

Contrast screen
White painted aluminum

Plastic (Polyamide PA), black

  • Glass fiber reinforced
  • With built-in magnet

Rubber NBR (Perbunan®)

Set screw, hexagon nut, serrated washer
Steel, zinc plated, blue passivated


Technical drawing

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GN 656.1 Oil Level Indicators with Electrical Oil Level Monitoring, Lateral Plug sketch

Article options / Table


LSWith normally open contact
LOWith normally closed contact
LWWith change-over contact
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l1bdhkl2l3l4l5l6l7l8s ≈
wall thickness
Max. compressive strength
in bar
7630,5M 1020402043,5102531319,555818
12730,5M 1230502097153631619,555618
25430,5M 12305020224280631319,555612

Build & Price

Open 3D configurator
Distance of the screws l1

Plug Characteristics


DIN EN 175301-803 type C

Cable gland:

PG 7, for a cable diameter of 6 to 7 mm

Cable cross section:

max. 1.5 mm²

Protection class:

IP 65

Notice: Magnetic fields can cause interference!


Oil Level Monitoring

The oil level is measured by means of a float with a built-in magnet which opens or closes a contact (REED switch) when the minimum fluid level is reached.

Electrical details

Type LS (normally open)

Type LO (normally closed)

Type LW (changeover contact)

Maximum contact voltage:

140 V AC, 200 V DC

140 V AC, 150 V DC

140 V AC, 150 V DC

Maximum current on contact:

1.2 A

2 A

2 A

Maximum switch capacity:

10 W

20 W

20 W

Operating symbol:

MD656{St:_}SB-41549-0 MD656{St:_}SB-41551-0 MD656{St:_}SB-41553-0

Assembly Instructions for the Cable Connection

  1. Loosen mounting screw and remove connector plug.

  2. Push the contact insert out of the connector housing.

  3. Loosen cable gland, slip on the cable through the connector housing, and connect the wires to the contact insert.

  4. Push the contact insert back into the connector housing in the required position, tighten the cable gland for strain relief and to seal the cable.

  5. Push the connector plug onto the contacts of the oil lever indicator and then secure it with the mounting screw.


Selected Part (How to order)

Total (net)
plus VAT 11,66 €
gross 73,03 €
In stock
ELESA Code: 11051
Description: HCV.76-E-NO-M10
Weight: 0,149 kg
If this article is new in our product range, it may happen that details concerning weight are as yet not listed.
If you do need weight details, please contact our Sales Department!
Phone +49 7723 6507 - 0
RoHS: Yes
This article is RoHS-compliant in application of Annex III., which means it complies with EU Directive 2011/65/EU, including extension (2015/863/EU), for restricting the use of certain hazardous substances in electrical and electronic devices. The Directive regulates the use of hazardous substances in devices and components. The implementation in national law is summarily described with RoHS(Restriction of (the use of certain) hazardous substances).
Please note our order discounts.
With a total value (net) per order:
from 175,00 € -> 10 % discount
from 275,00 € -> 20 % discount
from 375,00 € -> 30 % discount

Surcharge for small volume purchases:
-> 15,00 Euro
for value of goods less than 25,00 €
-> 10,00 Euro
for value of goods from 25,00 to 50,00 €
All prices in accordance with our price list No. 55, valid from 1 September 2022, plus VAT only valid for Germany.

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Our service team is available from Monday to Friday between 7:00 AM and 5:30 PM: +49 7723 6507 - 0

To the customised elements | To the contact persons

GN 656.1-76-LSGN 656.1-76-LOGN 656.1-76-LWGN 656.1-127-LSGN 656.1-127-LOGN 656.1-127-LWGN 656.1-254-LSGN 656.1-254-LOGN 656.1-254-LW

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