EN 543.4 Prismatic Fluid Sight Glasses Plastic


ELESA original design

code: HGFT-HT-PR

Product description


The sight glass of EN 543.4 prismatic fluid sight glasses is embedded in the body during the injection process and it is therefore absolutely leak tight.

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.

The seal is embedded in a radial recess, and thus cannot be squeezed out during tightening.

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


Technopolymer (Polyamide PA)
  • Black, matte finish
  • Temperature resistant up to 284 °F (140 °C)

Sight glass
Pressure resistant up to 7 bar

Rubber FPM (Viton®)

RoHS compliant


Thin hexagon nuts GN 7430

Technical drawing

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EN 543.4 Plastic Prismatic Fluid Sight Glasses sketch

Part Options / Table

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Dimensions in: Inch (change to Metric)
Pipe thread
tightening torque
in Nm
0.59G 1/21.100.390.330.946 ... 8
0.71G 3/41.380.370.331.268 ... 10
0.91G 11.670.430.371.5010 ... 12

Build & Price

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Total US Dollars (net)
In Stock: 3
In Stock
Please note our quantity discounts (US Dollars).
≥ 250$6.70
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: 0.013 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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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 543.4-18-G3/4GN 543.4-23-G1GN 543.4-15-G1/2

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