GN 543.4 Prismatic-Oil level sight glasses Plastic, up to 140 °C


ELESA original design

code: HGFT.HT-PR

Product description


The window of oil level sight glasses GN 543.4 is embedded in the body during the injection process and it is therefore absolutely leaktight.

Prismatic-Oil level sight glasses use the so-called prismatic effect of a „cat’s eye“ to give a clear and unmistakable oil level reading irrespective of oil colour or viscosity. The advantage of these effects becomes obvious in case of a total underfilling or overfilling and monitoring the situation under unfavourable conditions.

The sealing ring is embedded in a radial undercut and it cannot be extruded during the tightening operation.

Assembly instruction:
For mounting on walls of less than 4 mm thickness please use a mounting nut GN 543.1.


Plastic (Polyamide PA)
  • black, matte
  • temperature resistant up to 140 °C
  • pressure resistant up to 7 bar

Sight glass
Plastic Polysulfon

Rubber FPM (Viton®)



Mounting nuts GN 543.1

Technical drawing

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GN 543.4 Prismatic-Oil level sight glasses sketch

Article options / Table

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15G 1/228108,524
18G 3/435108,532
23G 143119,538

Build & Price

Window glass d1
Thread d2

Selected Part (How to order)

Weight: 0,006 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 conforms to RoHS, which means it complies with EU Directive 2011/65/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 150 Euro -> 10 % discount
from 250 Euro -> 20 % discount
from 350 Euro -> 30 % discount
All prices in accordance with our price list No. 51, valid from 1 February 2018, plus VAT only valid for Germany.

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