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Catalogue Technical Specification
Material Properties of Elastomer Rubber
Plastic Specification

CAD Data

3D CAD Files
2D CAD Files
GN744 Type A 3D CAD Model
GN744 Type B 3D CAD Model
GN744 Type C 3D CAD Model


GN744 Oil Level Sight Glass, Aluminium, Prismatic Plastic View



GN744: Oil Level Sight Glass
Type: A - with Prismatic Effect


GN744: Oil Level Sight Glass
Type: B - without Contrast Screen


GN744: Oil Level Sight Glass
Type: C - with Red Marking Ring

CAD Viewer Technical Data

Series Selector


Type A - with prismatic effect (only d1 = 14/18/24)

Type B - without contrast screen (all sizes)

Type C - with red marking ring (only d1 = 11/14/18/24)

CAD Viewer Technical Data

Product Description

GN744 Oil Level Sight Glass, Aluminium, Prismatic Plastic View 

Prismatic oil level sight glasses GN 744 use the prismatic effect of a cats eye to display the oil level unaffected by oil colour or oil viscosity. The advantage of this effect is particularly obvious in the case of under or overfilling or for inspection under unfavourable light conditions.

The seal is housed in a radial groove in the aluminium body and hence cannot be lost. In addition it cannot be extruded when tightening the sight glass.

For this reason the seal can be of a relatively soft material which increases it's sealing capacity even on uneven surface.

Oil level sight glasses GN744 can also be used on pressurised tanks. Pressure and vacuum pressure test data is available.

Installation Information

When mounting oil level sight glasses on walls of less than 4 mm thickness please use fixing nuts GN543.1


Body - aluminium AL, fine turned.

Sight glass - plastic, crystal-clear Polyamide (PA 6-T), red marking ring, pad printing

Temperature resistant up to 110°C

Sealing ring - rubber NBR (Perbunan)


Fixing nuts GN543.1

On Request

EPDM seals 

Related Series

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GN744 Oil Level Sight Glasses Aluminium Prismatic Plastic View coloured easy accurate

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