GN 743.6 Fluid Level Sight Glasses Aluminium / ESG glass, ATEX Explosion Protective


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


GN 743.6 the European guidelines for explosion protection introduced on 7/1/03 (ATEX) also cover explosion protection in the mechanical sector.
Fluid level sight glasses GN 743.6 are suitable for use in an explosion risk environment, and comply with guidelines 2014/34/EU. Detailed documentation accompanies this part when ordered.
Other features include:

1. Genuine glass of high stability and scratch proof.
2. Sealing with an O-ring on the periphery and not on the face edge of the glass. Leak tightness is therefore not affected by axial pressures.
3. Seal is housed in a groove and therefore cannot be lost. Meanwhile, this groove prevents the seal from being extruded when the sight glass is tightened. The location of this seal also allows the use of a softer Elastomer, which guarantees better and easier sealing.

Heat resistance: -20°C (-4°F) to 150°C (300°F).
Note: When mounting fluid level sight glasses on walls of less than 4mm thickness, use nut GN 543.1.


Sight glass body
  • Aluminum
  • turned
  • with bright finish

Sight glass

FPM (Viton®)

Retaining ring
Stainless Steel
AISI 301, European Standard No. 1.4310

RoHS compliant


GN 543.1 fixing nuts

On request

EPDM seal

Technical drawing

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GN 743.6 Aluminium / ESG glass Fluid Level Sight Glasses, ATEX Explosion Protective  sketch

Part Options / Table

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Dimensions in: Inch | Metric
Pipe Thread
0.43G 3/8M 16 x 1.5--0.870.310.310.79
0.55G 1/2M 20 x 1.5--1.020.330.350.91
0.71G 3/4M 26 x 1.5M 27 x 1.5M 27 x 21.260.350.431.18

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Total US Dollars (net)
In stock: 7
In stock
Please note our quantity discounts (US Dollars).
≥ 250$13.55
Prop 65: -
Please contact our Sales Department for more information: 800-877-8351
RoHS: Compliant
This article conforms to RoHS, which means it complies with EU Directive 2011/65/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)).
Weight: 0.055 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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