EN 541.6 Fluid Sight Glasses Crystal Clear Plastic, ATEX Explosion Protective


ELESA original design
code: HFTX-EX

Product Family ATEX

ATEX standard parts have been developed for explosion hazard conditions in hydraulics or gear construction. Every product includes a documentation showing the underlying European explosion protection directive (ATEX).

  • especially for explosion hazard zones
Show all ATEX products

Product description


EN 541.6 fluid sight glasses are suitable for use in potentially explosive atmospheres. They comply with the European explosion protection directive (ATEX) 2014/34/EU.

A detailed operating instruction is available and included with every fluid sight glass.

These fluid sight glasses made of polyamide plastic have a high mechanical strength. Therefore, they can be produced with thinner walls with a large viewing window.

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


Crystal clear Polyamide PA-T
  • High mechanical strength
  • Temperature resistant up to 176 °F (80 °C)
  • Solvent resistant, but not alcohol resistant

Rubber NBR (Perbunan®)

Anodized finish, natural color

RoHS compliant


Thin hex nuts GN 7430

Technical drawing

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EN 541.6 Crystal Clear Plastic Fluid Sight Glasses, ATEX Explosion Protective sketch

Part Options / Table


AWith reflector
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Dimensions in: Inch | Metric
Fine thread

Pipe thread
tightening torque
in Nm
0.43M 16 x 1.5-0.870.310.280.752 ... 3
0.55M 20 x 1.5-1.020.370.310.878 ... 10
0.71M 25 x 1.5-1.240.310.351.068 ... 10
0.71M 26 x 1.5-1.240.510.351.068 ... 10
0.79M 27 x 1.5-1.240.350.351.068 ... 10
0.87M 30 x 1.5-1.380.350.391.188 ... 10
0.98M 35 x 1.5-1.570.430.391.348 ... 10
1.18M 40 x 1.5-1.850.450.511.598 ... 10
0.43-G 3/80.870.300.280.753 ... 5
0.55-G 1/21.020.410.310.874 ... 6
0.79-G 3/41.240.410.351.066 ... 8
0.98-G 11.570.430.391.348 ... 10
1.18-G 1 1/41.850.450.511.598 ... 10

Build & Price

3D Product Configurator
Diameter d1
Fine thread d2
Pipe thread d2

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Total US Dollars (net)
Call / Email for Delivery Time
Please note our quantity discounts (US Dollars).
≥ 250$10.54
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 541.6-11-G3/8-AGN 541.6-11-M16X1,5-AGN 541.6-18-M25X1,5-AGN 541.6-30-G11/4-AGN 541.6-14-G1/2-AGN 541.6-25-M35X1,5-AGN 541.6-25-G1-AGN 541.6-30-M40X1,5-AGN 541.6-14-M20X1,5-AGN 541.6-18-M26X1,5-AGN 541.6-20-G3/4-AGN 541.6-20-M27X1,5-AGN 541.6-22-M30X1,5-A

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