JW Winco provides goods to one or more of the 16 Critical Infrastructure Sectors identified by CISA under the Department of Homeland Security. JW Winco meets the requirements established by CISA on March 19, 2020 as an essential business.

EN 541.3 Fluid Level Sight Glasses Technopolymer Plastic, Prismatic, with Recessed Seal


ELESA original design
code: HFTR.PR

Product description


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

These fluid level sight glasses are fitted with 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.

GN 541.3 fluid level sight glasses 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 GN 7430 mounting nuts.


Plastic, transparent
Technopolymer (Polyamide PA-T)
  • Aging resistant
  • High mechanical strength
  • Temperature resistant up to 212 °F (100 °C)
  • Oil and solvent proof (not suitable for alcohol)

Rubber NBR (Perbunan®)

RoHS compliant


Mounting nuts GN 7430

Technical drawing

Hide technical drawing
EN 541.3 Technopolymer Plastic Fluid Level Sight Glasses, Prismatic, with Recessed Seal sketch

Part Options / Table

Show / Hide columns


Dimensions in: Inch (change to Metric)
Window glass
tightening torque
in Nm
0.59G 1/21.100.410.350.94 8 ... 10
0.79G 3/41.380.410.411.2610 ... 12
0.94G 11.670.430.531.5010 ... 12
1.20G 11/42.050.750.631.6112 ... 14

Build & Price

3D Product Configurator
Window glass d1
Thread d2

Selected Part

Total US Dollars (net)
In stock: 0
Call / Email for Delivery Time
Please note our quantity discounts (US Dollars).
≥ 500$3.49
Prop 65: -
Please contact our Sales Department for more information: 800-877-8351
RoHS: -
This part is new in our product range, no details are available at this time. For more recent details on the RoHS compatibility, please contact our Sales Department!
Weight: 0.010 lbs
If weight is not listed, please contact our Sales Department for additional information regarding weight.
Phone: 800-877-8351
All Prices are in US Dollars. Taxes Not Included.

CAD Download

Email CAD File

To receive an email with a CAD download without creating an account, please enter your e-mail address. Max of 3 CAD files per day unless you create an account.

Please enter the code you can find in the picture.

About CAD Downloads
Save as Favorites

Please enter the code you can find in the picture.

Need Help?

Our service team is available from Monday to Friday between 7:30 AM and 5:00 PM Central Time: 800-877-8351

Special Requests | Contact our sales team

This could also be interesting...

JW Winco - Contact

United States
E-Mail: sales@jwwinco.com
Phone: +1-800-877-8351
Fax : +1-800-472-0670
Hours M-F 7:30 AM - 5:00 PM CT

Request Callback:

Privacy Policy

Request a Catalog

Request one of our many catalogs! For an overview of our products request the Product Overview Catalog (POC).

Request Free Catalogs

Sales Contacts

You are looking for a Winco partner near you? Please select the country.