Metric Sight Glass

Threaded sight glasses 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 metric threads conforming to ASME B1-1.3M-2005. Male stud of the fitting conforms to: ISO 6149-2/3. Required female port to Standard: DIN ISO 6149-1. This is a port with a chamfer machined for an O-ring.

Quartz Window Bonded to a 316 Stainless Steel Housing

High pressure sight glasses having perfect optical clarity. These sight windows comply with Pressure Equipment Directive, (PED) standard for high pressure testing. These metric threaded sight glasses have a long working life without maintenance. Ideal choice for applications requiring clear viewing of the process behind glass. For visual inspection, machine vision, laser sensors, in use with all common hydraulic oils, refrigerants, pharmaceutical processing equipment, paper and pulp plants, marine exterior, oil wells, feedwater heaters. These windows resist most oxidizing acids and salt sprays.

 

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 sight glass      

Sight glasses with metric straight threads conforming to ASME B1-1.3M-2005. Required port to Standard: DIN ISO 6149-1. Male fitting geometry conforms to: ISO 6149-2/3 for use with metric O-rings. For visual inspection, machine vision, laser sensors, in use with all common hydraulic oils, refrigerants, pharmaceutical processing equipment, paper & pulp plants, marine exterior, oil wells, feedwater heaters. Resists most oxidizing acids and salt sprays.


Housing material is 316 stainless steel offering better corrosion resistance than 304 stainless. Quartz window is sealed into the housing with non-outgassing quartz-filled bond forming a single-piece part. This sight glass has a long working life under severe temperature swings and prolonged exposures to UV light.



Nominal Thread Size, M-Thread Hex, mm Aperture, mm Bore 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 23.0 9.5 12.5 17.0 12.0 200 -50.0 230.0 217 to 3600 266A1000 $168.95 each
M20x1.5 25.0 12.0 15.3 19.0 14.0 210 -50.0 225.0 217 to 3600 266A1001 $178.79 each
M27x2 32.0 16.5 20.4 23.0 15.0 210 -50.0 225.0 217 to 3600 266A1003 $187.48 each
M33x2 41.0 22.1 26.0 25.0 16.0 210 -50.0 225.0 217 to 3600 266A1004 $197.30 each
M42x2 50.0 30.5 34.7 27.0 18.0 210 -50.0 225.0 217 to 3600 266A1005 $273.60 each
M48x2 55.0 35.4 40.2 33.0 18.0 210 -50.0 225.0 217 to 3600 266A1006 $283.55 each
M60x2 65.0 46.1 51.8 35.0 19.0 210 -50.0 225.0 217 to 3600 266A1007 $363.20 each

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Metric sight glasses with higher corrosion resistance than sight glasses in 316 stainless steel housing. 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 $145.03 each
M20x1.5 27.0 13.0 25.0 18.0 14.0 50 -30.0 280.0 310 to 2,200 702M20 $158.70 each
M26x1.5 32.0 16.0 32.0 23.0 15.0 50 -30.0 280.0 310 to 2,200 702M26 $175.00 each
M27x2 32.0 16.0 32.0 23.0 15.0 50 -30.0 280.0 310 to 2,200 702M27 $193.11 each
M33x2 41.0 22.0 40.0 25.0 16.0 50 -30.0 280.0 310 to 2,200 702M33 $213.23 each
M42x2 50.0 26.0 50.0 27.0 18.0 50 -30.0 280.0 310 to 2,200 702M42 $235.59 each
M48x2 55.0 28.0 55.0 27.0 18.0 50 -30.0 280.0 310 to 2,200 702M48 $260.44 each
M60x2 70.0 35.0 68.0 37.0 19.0 50 -30.0 280.0 310 to 2,200 702M60 $285.26 each
M78x2 90.0 50.0 88.0 37.0 20.0 50 -30.0 280.0 310 to 2,200 702M78 $314.61 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 -60.0 300.0 310 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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