Metric Size, Aluminum
Fluid Level Sight Glasses
With Limit Indicator

GN 537
wo


RoHS Compliant
 

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Specification
Information
Sight glass body: Aluminum  
Mounting: Push-fit; use pin key for installation
Sight glass: Plexiglas (PMMA)  
Seal: NBR synthetic rubber  
Reflector: White plastic with red fluid level limit indicators

Shipping

No thread is required for installing the GN 537 fluid level sight glasses.
The fluid level sight glass is inserted into the bore d2, tolerance H11. By simply tightening the ring nut using the pin key, the seal is pressed against the contact surface which, at the same time, holds the sight glass in position.
For removal, reverse the procedure.  
Application is limited to non-pressurized or slightly pressurized tanks.
Maximum heat resistance: 80°C (175°F).    Pin Key for Installation

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Metric Thread Table

Dimensions in:

millimeters
(inches)

Part Number
d1
Window
Glass
d2
Bore-Ø
b
min.
d3
d4
e
0.1mm
h
l1
l2
Pin Key for
Installation
With
Fluid Level
Indicator
Without
Fluid Level
Indicator
16
(.63)
20
(.79)
9
(.35)
25
(.98)
2.2
(.09)
21
(.83)

5
(.20)

15
(.59)
3.5
(.14)
22
(.87)
28
(1.10)
10
(.39)
35
(1.38)
3
(.12)
30
(1.18)
6
(.24)
15
(.59)
4.5
(.18)
32
(1.26)
38
(1.50)
12
(.47)
45
(1.77)
3
(.12)
40
(1.57)
8
(.31)
18
(.71)
5.5
(.22)
50
(1.97)
58
(2.28)
14
(.55)
64
(2.52)
3
(.12)
58.5
(2.30)
10
(.39)
22
(.87)
5.5
(.22)