GN 541.3 Prismatic-Oil level sight glasses Crystal-clear plastic, sealing collared


ELESA original design
code: HFTR.PR

Product description


Prismatic oil level sight glasses GN 541.3 are practically indestructible. Therefore, they are designed to be relatively thin.

These oil level sight glasses are fitted with a window creating a prismatic effect of a „cat’s eye“ to provide a clearer and unmistakable oil level reading irrespective of oil colour or viscosity. The advantage of this effect becomes obvious in cases such as underfilling or overfilling and monitoring the situation under unfavourable conditions.

Prismatic oil level sight glasses GN 541.3 can also be used in tanks which are pressurised. Test results are available.

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


  • crystal-clear Polyamid (PA 6-T)
  • ageing resistant
  • high mechanical strength
  • temperature resistant up to 100 °C
  • solvent resistant,
    but not suitable for alcohol

Rubber NBR (Perbunan®)



Mounting nuts GN 543.1

Technical drawing

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GN 541.3 Prismatic-Oil level sight glasses, plastic, sealing collared sketch

Article options / Table

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Window glass
tightenin torque
in Nm
15G 1/22810,5924 8 ... 10
20G 3/43510,510,53210 ... 12
24G 142,51113,53810 ... 12
30,5G 11/45219164112 ... 14

Build & Price

Window glass d1
Thread d2

Selected Part (How to order)

Total (net)
plus VAT 0,44 €
gross 2,76 €
In stock
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 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 Euro -> 10 % discount
from 275,00 Euro -> 20 % discount
from 375,00 Euro -> 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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