Metric Sight Glass

These sight windows are typically used for visual inspection, machine vision, optical sensors, in use with all common hydraulic oils, refrigeration, water heaters, and compressed air applications.

Metric sight glasses with male fittings conforming to ISO 6149-1 standard, (SAE 2244-1/DIN 3852, Part 3). The housings have metric straight threads to ISO 262. In other words, metric sight glasses are governed by ISO 6149-1 for the port details, and the threads are governed by Metric ISO 261 standard.

The windows in these metric sight glasses are fused or bonded or sealed with a gasket within their metal housings. The part is easy to install, and has a long working life without maintenance. Be sure to use the installation guide to ensure proper torque is used, as glass windows need some diligence during installation.

Metric Sight Glasses, 316 Stainless Steel, Quartz Windows

Sight windows with metric threads conforming to ASME B1-1.3M-2005. 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.

AISI 316 Stainless Steel housing has a finish of 32 RMS providing smooth surfaces reducing residues or particle contaminants. 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.

Required port to Standard: DIN ISO 6149-1. Male stud of the fitting conforms to: ISO 6149-2/3 for use with O-ring ISO M18.

Aperture Dia. Thread Max Operating Pressure Max Operating Temp. Housing Material Window Material Mfg. P/N. Encole P/N. Price
9.50 mm M18 x 1.5 210 bar 140 C AISI 316 Quartz 100488 266A1000 $244.95 each
11.60 mm M20 x 1.5 210 bar 140 C AISI 316 Quartz 100491 266A1001 $255.78 each
16.30 mm M27 x 2 210 bar 140 C AISI 316 Quartz 100497 266A1003 $275.99 each
21.80 mm M33 x 2 210 bar 140 C AISI 316 Quartz 100500 266A1004 $368.87 each
30.00 mm M42 x 2 210 bar 140 C AISI 316 Quartz 100503 266A1005 $409.00 each
35.10 mm M48 x 2 210 bar 140 C AISI 316 Quartz 100506 266A1006 $498.16 each
45.70 mm M60 x 2 200 bar 140 C AISI 316 Quartz 100509 266A1007 $558.75 each
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M-Threaded Sight Glass, Borosilicate Fused to Duplex Steel 2205 or Hastelloy Housing

Sight windows with straight metric threads sealing with an O-ring. Female connection port conforming to DIN 3852 Type F.

For visual inspection, machine vision, optical sensors, in use with all common hydraulic oils, refrigeration, water heaters, and compressed air applications.

Fusing glass to metal creates a hermetically sealed single-piece part. The advantage of this construction is high strength of the glass, which ensures safety of operation, even during cycling operating temperatures common with equipment starts and stops. The part is easy to install, and has a long working life without maintenance.

Aperture Dia. Thread Max Operating Pressure Max Operating Temp. Housing Material Window Material Mfg. P/N. Encole P/N. Price
10.00 mm M18 x 1.5 50 bar 280 C 2205 Duplex Borosilicate Met 61-M18 x 1.5S 702M18 $195.03 each
10.00 mm M18 x 1.5 50 bar 300 C Hastelloy C-22 Borosilicate Met 61-M18 x 1.5H 703M18 $398.80 each
12.50 mm M20 x 1.5 50 bar 300 C Hastelloy C-22 Borosilicate Met 61-M20 x 1.5H 703M20 $459.75 each
16.50 mm M26 x 1.5 50 bar 300 C Hastelloy C-22 Borosilicate Met 61-M26 x 1.5H 703M26 $515.80 each
16.50 mm M27 x 2 50 bar 300 C Hastelloy C-22 Borosilicate Met 61-M27 x 2H 703M27 $538.98 each
22.00 mm M33 x 2 50 bar 300 C Hastelloy C-22 Borosilicate Met 61-M33 x 2H 703M33 $575.90 each
24.00 mm M42 x 2 50 bar 300 C Hastelloy C-22 Borosilicate Met 61-M42 x 2H 703M42 $649.47 each
26.00 mm M48 x 2 50 bar 300 C Hastelloy C-22 Borosilicate Met 61- M48 x 2H 703M48 $698.54 each
34.00 mm M60 x 2 50 bar 300 C Hastelloy C-22 Borosilicate Met 61-M60 x 2H 703M60 $757.41 each
12.50 mm M20 x 1.5 50 bar 280 C 2205 Duplex Borosilicate Met 61-M20 x 1.5S 702M20 $223.70 each
16.50 mm M26 x 1.5 50 bar 280 C 2205 Duplex Borosilicate Met 61-M26 x 1.5S 702M26 $275.80 each
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