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GN 654.1 Oil level indicators increased chemical resistance


ELESA original design
code: HCK-GL

Product Family Stainless Steel

Standard parts made of rustproof stainless steel have been designed for use in the food sector, in the chemical industry, for aggressive ambient conditions or for outdoor use.

  • corrosion-resistant
  • precise fit
  • environmentally friendly
Show all Stainless Steel products

Product description


Owing to the U-rail and the cover, oil level indicators GN 654.1 are extremely stable and are therefore suitable for great lengths. The fluid level can also be viewed from the side.

Oil level indicators GN 654.1 have a high chemical resistance and are also suitable for media containing or based on glycol.

For special requirements in terms of chemical resistance, pressure and temperature resistance, please contact us.


Glass tube
borosilicate glass (Pyrex®)
  • temperature resistant up to 130 °C
  • highest mechanical and thermal resistance

Rubber FKM (Viton®)

Set screw
Stainless Steel AISI 303

anodized, natural colour

End pieces
Technopolymer (Polyamide PA)
  • black, matt
  • temperature resistant up to 130 °C

Plastic, chrystal-clear Polycarbonate (PC)


On request

other lengths l1
with temperatue display
with electrical temperature monitoring

Technical drawing

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GN 654.1 Oil level indicators, high chemical resistance sketch

Article options / Table

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l1bdl2l3l4l5l6l7s ≈
wall thickness
7633M 1020421131718,53312
12733M 1220711642818,53310
17633M 12201202132818,53310
25433M 12201982912818,53310
38133M 12203254182818,53310
50833M 12204525452818,53310

Build & Price

Open 3D configurator
Distance of the screws l1

Assembly instructions

Sketch GN 654 assembly

The assembly of the oil level indicators GN 654.1 is very simple and economical. You need two drillings Ø 10,5 and/or Ø 12,5 mm in the distance l1 in te containerv wall. The oil level indicator can also be installed directly i.e. without nut, if the container wall has a fitting thread.
All individual parts necessary for the assembly are provided:
Hexagon nuts, O-rings and serrated lock washers for safe guard.
For perfect sealing by the O-rings the screws should not be too strongly tightened (max. 12 Nm). Recommended roughness of the
sealing surface RA = 3 μm.

Selected Part (How to order)

Total (net)
plus VAT 7,16 €
gross 51,91 €
In stock
Weight: 0,160 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 quantity discounts.
With a total value (net) per order:
from 175,00 € -> 10 % discount
from 275,00 € -> 20 % discount
from 375,00 € -> 30 % discount
With a total value (net) per order:
All prices in accordance with our price list No. 52, valid from 1 May 2019, plus VAT only valid for Germany.

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