EN 541.3 Prismatic Fluid Sight Glasses Crystal Clear Plastic, with Recessed Seal


ELESA original design
code: HFTR-PR

Product description


EN 541.3 prismatic fluid sight glasses made of polyamide plastic have a high mechanical strength. Therefore, they can be produced with thinner walls.

These fluid sight glasses use the prismatic effect of a cat’s eye to give a clear indication of the fluid level unaffected by fluid color or fluid viscosity. The advantage of this effect is particularly obvious in the case of underfilling or overfilling and for inspection under unfavorable light conditions.

These fluid sight glasses can also be used on pressurized tanks. Tests regarding maximum pressure are available.

Assembly note:
For wall thicknesses below 4 mm, use GN 7430 thin hex nuts.


Crystal clear Polyamide PA-T
  • Aging resistant
  • High mechanical strength
  • Temperature resistant up to 212 °F (100 °C)
  • Solvent resistant,
    but not alcohol resistant

Rubber NBR (Perbunan®)

RoHS compliant


Thin hex nuts GN 7430

Technical drawing

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EN 541.3 Crystal Clear Plastic Prismatic Fluid Sight Glasses, with Recessed Seal sketch

Part Options / Table

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Dimensions in: Inch (change to Metric)
Pipe thread
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 1 1/42.050.750.631.6112 ... 14

Build & Price

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Diameter d1
Pipe thread d2

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Total US Dollars (net)
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Please note our quantity discounts (US Dollars).
≥ 500$4.07
Prop 65: -
Please contact our Sales Department for more information.
RoHS: -
No details on RoHS compatibility are available at this time. Please contact our Sales Department for more information.
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.

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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

GN 541.3-30,5-G11/4GN 541.3-15-G1/2GN 541.3-24-G1GN 541.3-20-G3/4

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