Metric Sight Glass

Threaded sight glass with straight metric threads sealing with an O-ring. These sight glasses are for machine vision or live observation of a process in a variety of industries. The glass is fused to a metal housing creating a hermetically sealed single-piece part. Connections are ISO 6149-2/3 straight threads for sealing into a port having a chamfer for an O-ring.

Sodalime Glass Fused to a 2205 Duplex Stainless Steel Housing

These sight windows comply with Pressure Equipment Directive, (PED) standard for high pressure testing. Materials comply with VdTUV specifications and DIN/EU designated standards. Reliable sights for general use in commercial and high tech applications such as hydraulics, refrigeration, water heaters, deep sea and oil well cameras and lighting and explosion/combustion viewing. These metric threaded sight glasses have a long working life without maintenance. The sights transmit a broad range of wavelengths operating in a high pressure and high temperature environment.

 

Borosilicate Glass Fused to a 2205 Duplex Stainless Steel Housing

Borosilicate has a higher tolerance to thermal shock than sodalime glass. These sights are suitable for a wide range of applications. An ideal configuration for use in imaging systems operating under high pressure.

 

Borosilicate Glass Fused to a Hastelloy C22 Housing

Sight glasses for the most demanding applications. Borosilicate glass fused to a Hastelloy metal housing allows for operating temperatures from 60 C up to +300 C with wide temperature swings. Excellent resistance to localized corrosion and stress corrosion cracking. Good resistance to oxidizing corrosives. Ideal configuration for most sophisticated pharmaceutical reaction vessels.


metric thread sight glass

Sight glasses with soda lime glass fused to a 2205 duplex stainless steel housing having metric straight threads. Glass thickness is less than the full height of the part. Ideal for viewing the colors or transmitting light, not for pure optical clarity.

Note: The image of the objects behind the glass will be distorted as the glass is slightly concave.



Nominal Thread Size, M-Thread Hex, mm Aperture, mm Shoulder D, mm H, mm L, mm Max Operating Pressure, bar Min Operating Temperature, C Max Operating Temperature, C Transmitted Wavelength, nm Encole Part Number Price
M18x1,5 24.0 10.0 23.0 18.0 12.0 50 -30.0 150.0 350 to 2,600 701M18 $144.67 each
M20x1,5 27.0 13.0 25.0 18.0 14.0 50 -30.0 150.0 350 to 2,600 701M20 $159.63 each
M26x1,5 32.0 16.0 32.0 23.0 15.0 50 -30.0 150.0 350 to 2,600 701M26 $176.26 each
M27x2 32.0 16.0 32.0 23.0 15.0 50 -30.0 150.0 350 to 2,600 701M27 $194.73 each
M33x2 41.0 22.0 40.0 25.0 16.0 50 -30.0 150.0 350 to 2,600 701M33 $215.26 each
M42x2 50.0 26.0 50.0 27.0 18.0 50 -30.0 150.0 350 to 2,600 701M42 $238.07 each
M48x2 55.0 28.0 55.0 27.0 18.0 50 -30.0 150.0 350 to 2,600 701M48 $253.41 each
M60x2 70.0 35.0 68.0 37.0 19.0 50 -30.0 150.0 350 to 2,600 701M60 $288.75 each
M78x2 90.0 50.0 88.0 37.0 20.0 50 -30.0 150.0 350 to 2,600 701M78 $316.62 each

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Yet for higher corrosion resistant applications than sight glasses with soda lime glass. Ideal configuration for high pressure tanks, liquid level viewports, deep or shallow seawater; all types or refrigerants, including CO2 based R744 refrigerant. 3A-Rated Standard for sanitary applications in pharmaceutical and food processing; IR applications, DUV lithography, semiconductors, CO2 laser systems.

metric thread sight glass size

Borosilicate Glass Fused to a 2205 Duplex Stainless Steel Housing. Glass thickness is less than the full height of the part. Ideal for viewing the colors or transmitting light, not for pure optical clarity.

Note: The image of the objects behind the glass will be distorted as the glass is slightly concave.



Nominal Thread Size, M-Thread Hex, mm Aperture, mm Shoulder D, mm H, mm L, mm Max Operating Pressure, bar Min Operating Temperature, C Max Operating Temperature, C Transmitted Wavelength, nm Encole Part Number Price
M18x1,5 24.0 10.0 23.0 18.0 12.0 50 -30.0 280.0 310 to 2,200 702M18 $142.03 each
M20x1,5 27.0 13.0 25.0 18.0 14.0 50 -30.0 280.0 310 to 2,200 702M20 $156.70 each
M26x1,5 32.0 16.0 32.0 23.0 15.0 50 -30.0 280.0 310 to 2,200 702M26 $173.00 each
M27x2 32.0 16.0 32.0 23.0 15.0 50 -30.0 280.0 310 to 2,200 702M27 $191.11 each
M33x2 41.0 22.0 40.0 25.0 16.0 50 -30.0 280.0 310 to 2,200 702M33 $211.23 each
M42x2 50.0 26.0 50.0 27.0 18.0 50 -30.0 280.0 310 to 2,200 702M42 $233.59 each
M48x2 55.0 28.0 55.0 27.0 18.0 50 -30.0 280.0 310 to 2,200 702M48 $258.44 each
M60x2 70.0 35.0 68.0 37.0 19.0 50 -30.0 280.0 310 to 2,200 702M60 $283.26 each
M78x2 90.0 50.0 88.0 37.0 20.0 50 -30.0 280.0 310 to 2,200 702M78 $310.61 each

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For most demanding applications. These sight glasses are ideal for imaging systems experiencing high temperature swings.

metric thread sight glass dimensions

Borosilicate Glass Fused to a Hastelloy C22 Housing. Glass thickness is less than the full height of the part. Ideal for viewing the colors or transmitting light, not for pure optical clarity.

Note: The image of the objects behind the glass will be distorted as the glass is slightly concave.

 


Nominal Thread Size, M-Thread Hex, mm Aperture, mm Shoulder D, mm H, mm L, mm Max Operating Pressure, bar Min Operating Temperature, C Max Operating Temperature, C Transmitted Wavelength, nm Encole Part Number Price
M18x1,5 24.0 10.0 23.0 18.0 12.0 50 -60.0 300.0 310 to 2,200 703M18 $398.80 each
M20x1,5 27.0 13.0 25.0 18.0 14.0 50 -60.0 300.0 310 to 2,200 703M20 $459.75 each
M26x1,5 32.0 16.0 32.0 23.0 15.0 50 -60.0 300.0 310 to 2,200 703M26 $515.80 each
M27x2 32.0 16.0 32.0 23.0 15.0 50 -60.0 300.0 310 to 2,200 703M27 $538.98 each
M33x2 25.0 22.0 40.0 25.0 16.0 50 -60.0 30050.0 310 to 2,200 703M33 $575.90 each
M42x2 50.0 26.0 50.0 27.0 18.0 50 -60.0 300.0 310 to 2,200 703M42 $649.47 each
M48x2 55.0 28.0 55.0 27.0 18.0 50 -60.0 300.0 310 to 2,200 703M48 $698.54 each
M60x2 70.0 35.0 68.0 37.0 19.0 50 -60.0 300.0 310 to 2,200 703M60 $757.41 each
M78x2 90.0 50.0 88.0 37.0 20.0 50 -60.0 300.0 310 to 2,200 703M78 $795.80 each

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