Sight Glass

The objective of a sight glass is to provide a window into a pressure vessel, a hot temperature or corrosive process environment, for machine vision or live observation. We manufacture and distribute sight glasses, sapphire and quartz windows as well as laser window assemblies. Encole offers stock and custom high pressure sight glasses for energy, food processing and pharmaceutical applications. We also offer sight windows for ultra high vacuum in semiconductor applications. Sight windows available through the catalog cover a broad spectrum of transmitted wavelengths, from infrared to ultraviolet.

Image Encole Part Number Price ASME Class Aperture Dia. Flange OD Housing Material Max Operating Pressure Max Operating Temperature Nominal Pipe Size SAE-Dash Size Thread Window Material With Reflector
252A1006 $779.00 each - 80.00 mm - AISI 316L 235 psi 280 C ISO-50 - - Borosilicate -
252A1007 $869.00 each - 100.00 mm - AISI 316L 235 psi 280 C ISO-80 - - Borosilicate -
252A1008 $975.00 each - 125.00 mm - AISI 316L 235 psi 280 C ISO-100 - - Borosilicate -
252A1009 $1,251.00 each - 150.00 mm - AISI 316L 235 psi 280 C ISO-125 - - Borosilicate -
252A1010 $1,644.00 each - 175.00 mm - AISI 316L 235 psi 280 C ISO-150 - - Borosilicate -
252A1011 $2,423.00 each - 225.00 mm - AISI 316L 235 psi 280 C ISO-200 - - Borosilicate -
252A1012 $600.00 each - 80.00 mm - Carbon Steel 150 psi 280 C ISO-50 - - Borosilicate -
252A1013 $800.00 each - 100.00 mm - Carbon Steel 150 psi 280 C ISO-80 - - Borosilicate -
252A1014 $1,000.00 each - 125.00 mm - Carbon Steel 150 psi 280 C ISO-100 - - Borosilicate -
252A1015 $1,200.00 each - 150.00 mm - Carbon Steel 150 psi 280 C ISO-125 - - Borosilicate -
252A1016 $2,000.00 each - 175.00 mm - Carbon Steel 150 psi 280 C ISO-150 - - Borosilicate -
265A1000 $244.95 each - 0.380 inch - AISI 316 3040 psi 140 C - - NPT 3/8" Quartz -
265A1001 $255.78 each - 0.460 inch - AISI 316 3040 psi 140 C - - NPT 1/2" Quartz -
265A1002 $259.80 each - 0.640 inch - AISI 316 3040 psi 140 C - - NPT 3/4" Quartz -
265A1003 $275.99 each - 0.860 inch - AISI 316 3040 psi 140 C - - NPT 1" Quartz -
265A1004 $368.87 each - 1.180 inch - AISI 316 3040 psi 140 C - - NPT 1-1/4" Quartz -
265A1005 $409.00 each - 1.380 inch - AISI 316 3040 psi 140 C - - NPT 1-1/2" Quartz -
265A1006 $498.16 each - 1.800 inch - AISI 316 2900 psi 140 C - - NPT 2" Quartz -
266A1000 $244.95 each - 9.50 mm - AISI 316 210 bar 140 C - - M18 x 1.5 Quartz -
266A1001 $255.78 each - 11.60 mm - AISI 316 210 bar 140 C - - M20 x 1.5 Quartz -
266A1003 $275.99 each - 16.30 mm - AISI 316 210 bar 140 C - - M27 x 2 Quartz -
266A1004 $368.87 each - 21.80 mm - AISI 316 210 bar 140 C - - M33 x 2 Quartz -
266A1005 $409.00 each - 30.00 mm - AISI 316 210 bar 140 C - - M42 x 2 Quartz -
266A1006 $498.16 each - 35.10 mm - AISI 316 210 bar 140 C - - M48 x 2 Quartz -
266A1007 $558.75 each - 45.70 mm - AISI 316 200 bar 140 C - - M60 x 2 Quartz -
268A1000 $244.95 each - 0.380 inch - AISI 316 210 bar 140 C - SAE-8 3/4-16 Quartz -
268A1001 $255.78 each - 0.460 inch - AISI 316 210 bar 140 C - SAE-10 7/8-14 Quartz -
268A1002 $259.80 each - 0.640 inch - AISI 316 210 bar 140 C - SAE-12 1-1/16-12 Quartz -
268A1003 $275.99 each - 0.860 inch - AISI 316 210 bar 140 C - SAE-16 1-5/16-12 Quartz -
268A1004 $368.87 each - 1.180 inch - AISI 316 210 bar 140 C - SAE-20 1-5/8-12 Quartz -
268A1005 $409.00 each - 1.380 inch - AISI 316 210 bar 140 C - SAE-24 1-7/8-12 Quartz -
268A1006 $498.16 each - 1.800 inch - AISI 316 200 bar 140 C - SAE-32 2-1/2-12 Quartz -
324A1000 $308.36 each - 0.360 inch - AISI 316 7048 psi 140 C - - NPT 3/8" Quartz -
324A1001 $326.04 each - 0.410 inch - AISI 316 7048 psi 140 C - - NPT 1/2" Quartz -
324A1002 $341.93 each - 0.570 inch - AISI 316 7048 psi 140 C - - NPT 3/4" Quartz -
324A1003 $354.68 each - 0.750 inch - AISI 316 7048 psi 140 C - - NPT 1" Quartz -
324A1004 $479.00 each - 1.050 inch - AISI 316 7048 psi 140 C - - NPT 1-1/4" Quartz -
324A1005 $597.58 each - 1.250 inch - AISI 316 7048 psi 140 C - - NPT 1-1/2" Quartz -
324A1006 $662.42 each - 1.680 inch - AISI 316 7048 psi 140 C - - NPT 2" Quartz -
325A1000 $2,133.00 each - 0.770 inch - Hastelloy C-276 210 bar 426 C - - NPT 1" Sapphire -
325A1001 $2,511.00 each - 1.160 inch - Hastelloy C-276 190 bar 426 C - - NPT 1-1/2" Sapphire -
325A1002 $2,889.00 each - 1.660 inch - Hastelloy C-276 190 bar 426 F - - NPT 2" Sapphire -
325A1003 $3,393.00 each - 2.000 inch - Hastelloy C-276 135 bar 426 C - - NPT 2-1/2" Sapphire -
325A1004 $3,789.00 each - 2.420 inch - Hastelloy C-276 135 bar 426 C - - NPT 3" Sapphire -
326A1000 $5,520.00 each - 1.000 inch - 800H 145 psi 2000 F - - - Quartz -
326A1001 $5,960.00 each - 2.000 inch - 800H 145 psi 2000 F - - - Quartz -
326A1002 $7,734.00 each - 3.000 inch - 800H 145 psi 2000 F - - - Quartz -
326A1003 $8,760.00 each - 4.000 inch - 800H 145 psi 2000 F - - - Quartz -
326A1004 $10,860.00 each - 6.000 inch - 800H 145 psi 2000 F - - - Quartz -
330A1000 $59.26 per package of 2 - 0.312 inch - AISI 303 125 psi 225 F - - NPT 1/4" Soda lime No
330A1001 $65.32 per package of 2 - 0.469 inch - AISI 303 125 psi 225 F - - NPT 3/8" Soda lime No
330A1002 $71.32 per package of 2 - 0.469 inch - AISI 303 125 psi 225 F - - NPT 3/8" Soda lime Yes
330A1003 $77.32 per package of 2 - 0.594 inch - AISI 303 125 psi 225 F - - NPT 1/2" Soda lime No
330A1004 $81.32 per package of 2 - 0.594 inch - AISI 303 125 psi 225 F - - NPT 1/2" Soda lime Yes
330A1005 $85.32 per package of 2 - 0.781 inch - AISI 303 125 psi 225 F - - NPT 3/4" Soda lime No
330A1006 $93.32 per package of 2 - 0.781 inch - AISI 303 125 psi 225 F - - NPT 3/4" Soda lime Yes
330A1007 $93.78 per package of 2 - 1.000 inch - AISI 303 100 psi 225 F - - NPT 1" Soda lime No
330A1008 $95.32 per package of 2 - 1.000 inch - AISI 303 100 psi 225 F - - NPT 1" Soda lime Yes
330A1009 $123.70 per package of 2 - 1.593 inch - AISI 303 75 psi 225 F - - NPT 1-1/4" Soda lime No
330A1010 $64.67 each - 1.593 inch - AISI 303 75 psi 225 F - - NPT 1-1/4" Soda lime Yes
330A1011 $72.67 each - 1.531 inch - AISI 303 50 psi 225 F - - NPT 1-1/2" Soda lime No
330A1012 $74.85 each - 1.531 inch - AISI 303 50 psi 225 F - - NPT 1-1/2" Soda lime Yes
330A1013 $86.75 each - 1.969 inch - AISI 303 50 psi 225 F - - NPT 2" Soda lime No
330A1014 $89.65 each - 1.969 inch - AISI 303 50 psi 225 F - - NPT 2" Soda lime Yes
336A1001 $268.93 each - 10.00 mm 25.00 mm 2205 Duplex 16 bar 280 C - - - - -
336A1002 $268.93 each - 25.00 mm 51.00 mm 2205 Duplex 16 bar 280 C - - - - -
336A1003 $274.45 each - 30.00 mm 64.00 mm 2205 Duplex 16 bar 280 C - - - - -
336A1004 $308.30 each - 35.00 mm 78.00 mm 2205 Duplex 16 bar 280 C - - - - -
336A1005 $339.10 each - 40.00 mm 91.00 mm 2205 Duplex 16 bar 280 C - - - - -
336A1006 $434.50 each - 50.00 mm 106.00 mm 2205 Duplex 16 bar 280 C - - - - -
336A1007 $484.70 each - 55.00 mm 119.00 mm 2205 Duplex 16 bar 280 C - - - - -
336A1008 $986.60 each - 75.00 mm 167.00 mm 2205 Duplex 16 bar 280 C - - - - -
336A1009 $1,276.80 each - 100.00 mm 218.00 mm 2205 Duplex 16 bar 280 C - - - - -
336A1010 $1,767.20 each - 120.00 mm 268.00 mm 2205 Duplex 16 bar 280 C - - - - -
336A1011 $2,486.00 each - 140.00 mm 319.00 mm 2205 Duplex 16 bar 280 C - - - - -
405S05 $181.27 each - 9.00 mm - 2205 Duplex 100 bar 280 C - - NPT 1/4" Borosilicate -
405S06 $189.55 each - 10.00 mm - 2205 Duplex 100 bar 280 C - - NPT 3/8" Borosilicate -
405S07 $198.32 each - 14.00 mm - 2205 Duplex 100 bar 280 C - - NPT 1/2" Borosilicate -
405S09 $209.24 each - 18.00 mm - 2205 Duplex 100 bar 280 C - - NPT 3/4" Borosilicate -
405S11 $218.53 each - 22.00 mm - 2205 Duplex 100 bar 280 C - - NPT 1" Borosilicate -
405S12 $288.89 each - 25.00 mm - 2205 Duplex 100 bar 280 C - - NPT 1-1/4" Borosilicate -
405S13 $291.08 each - 30.00 mm - 2205 Duplex 100 bar 280 C - - NPT 1-1/2" Borosilicate -
405S14 $386.59 each - 37.00 mm - 2205 Duplex 100 bar 280 C - - NPT 2" Borosilicate -
405S16 $496.94 each - 55.00 mm - 2205 Duplex 100 bar 280 C - - NPT 3" Borosilicate -
406S05 $287.54 each - 9.00 mm - Hastelloy C-22 100 bar 300 C - - NPT 1/4" Borosilicate -
406S06 $333.95 each - 10.00 mm - Hastelloy C-22 100 bar 300 C - - NPT 3/8" Borosilicate -
406S07 $378.50 each - 14.00 mm - Hastelloy C-22 100 bar 300 C - - NPT 1/2" Borosilicate -
406S09 $435.90 each - 18.00 mm - Hastelloy C-22 100 bar 300 C - - NPT 3/4" Borosilicate -
406S11 $540.00 each - 22.00 mm - Hastelloy C-22 100 bar 300 C - - NPT 1" Borosilicate -
406S12 $622.00 each - 25.00 mm - Hastelloy C-22 100 bar 300 C - - NPT 1-1/4" Borosilicate -
406S13 $712.00 each - 30.00 mm - Hastelloy C-22 100 bar 300 C - - NPT 1-1/2" Borosilicate -
406S14 $1,370.00 each - 37.00 mm - Hastelloy C-22 100 bar 300 C - - NPT 2" Borosilicate -
406S16 $2,321.00 each - 55.00 mm - Hastelloy C-22 100 bar 300 C - - NPT 3" Borosilicate -
407S05 $209.94 each - 9.00 mm - 2205 Duplex 100 bar 150 C - - NPTF 1/4" Soda lime No
407S06 $219.85 each - 10.00 mm - 2205 Duplex 100 bar 150 C - - NPTF 3/8" Soda lime No
407S07 $234.90 each - 14.00 mm - 2205 Duplex 100 bar 150 C - - NPTF 1/2" Soda lime No
407S09 $248.85 each - 18.00 mm - 2205 Duplex 100 bar 150 C - - NPTF 3/4" Soda lime No
407S11 $263.90 each - 22.00 mm - 2205 Duplex 100 bar 150 C - - NPTF 1" Soda lime No
407S12 $284.80 each - 25.00 mm - 2205 Duplex 100 bar 150 C - - NPTF 1-1/4" Soda lime No
407S13 $297.95 each - 30.00 mm - 2205 Duplex 100 bar 150 C - - NPTF 1-1/2" Soda lime No
407S14 $306.80 each - 37.00 mm - 2205 Duplex 100 bar 150 C - - NPTF 2" Soda lime No
407S16 $384.50 each - 55.00 mm - 2205 Duplex 100 bar 150 C - - NPTF 3" Soda lime No
408S05 $141.79 each - 9.00 mm - 2205 Duplex 100 bar 280 C - - NPTF 1/4" Borosilicate No
408S06 $150.63 each - 11.00 mm - 2205 Duplex 100 bar 280 C - - NPTF 3/8" Borosilicate No
408S07 $155.00 each - 14.00 mm - 2205 Duplex 100 bar 150 C - - NPTF 1/2" Borosilicate No
408S09 $165.35 each - 18.00 mm - 2205 Duplex 100 bar 150 C - - NPTF 3/4" Borosilicate No
408S11 $177.09 each - 22.00 mm - 2205 Duplex 100 bar 150 C - - NPTF 1" Borosilicate No
408S12 $213.94 each - 25.00 mm - 2205 Duplex 100 bar 150 C - - NPTF 1-1/4" Borosilicate No
408S13 $236.47 each - 30.00 mm - 2205 Duplex 100 bar 150 C - - NPTF 1-1/2" Borosilicate No
408S14 $270.23 each - 37.00 mm - 2205 Duplex 100 bar 150 C - - NPTF 2" Borosilicate No
408S16 $376.97 each - 55.00 mm - 2205 Duplex 100 bar 150 C - - NPTF 3" Soda lime No
409S05 $447.72 each - 9.00 mm - Hastelloy C-22 100 bar 300 C - - NPTF 1/4" Borosilicate No
409S06 $465.13 each - 10.00 mm - Hastelloy C-22 100 bar 150 C - - NPTF 3/8" Borosilicate No
409S07 $478.68 each - 14.00 mm - Hastelloy C-22 100 bar 300 C - - NPTF 1/2" Borosilicate No
409S09 $496.08 each - 18.00 mm - Hastelloy C-22 100 bar 300 C - - NPTF 3/4" Borosilicate No
409S11 $529.43 each - 22.00 mm - Hastelloy C-22 100 bar 150 C - - NPTF 1" Borosilicate No
409S12 $585.38 each - 25.00 mm - Hastelloy C-22 100 bar 300 C - - NPTF 1-1/4" Borosilicate No
409S13 $647.68 each - 30.00 mm - Hastelloy C-22 100 bar 300 C - - NPTF 1-1/2" Borosilicate No
409S14 $738.95 each - 37.00 mm - Hastelloy C-22 100 bar 300 C - - NPTF 2" Borosilicate No
409S16 $769.82 each - 55.00 mm - Hastelloy C-22 100 bar 300 C - - NPTF 3" Borosilicate No
410S05 $214.08 each - 5.00 mm - 2205 Duplex 100 bar 150 C - - NPT 1/4" Soda lime -
410S06 $231.05 each - 7.00 mm - 2205 Duplex 100 bar 150 C - - NPT 3/8" Soda lime -
410S07 $248.12 each - 11.00 mm - 2205 Duplex 100 bar 150 C - - NPT 1/2" Soda lime -
410S09 $262.12 each - 17.00 mm - 2205 Duplex 100 bar 150 C - - NPT 3/4" Soda lime -
410S11 $283.15 each - 19.00 mm - 2205 Duplex 100 bar 150 C - - NPT 1" Soda lime -
410S12 $288.05 each - 22.00 mm - 2205 Duplex 100 bar 150 C - - NPT 1-1/4" Soda lime -
410S13 $299.25 each - 25.00 mm - 2205 Duplex 100 bar 150 C - - NPT 1-1/2" Soda lime -
410S14 $381.23 each - 35.00 mm - 2205 Duplex 100 bar 150 C - - NPT 2" Soda lime -
413S05 $214.80 each - 5.00 mm - 2205 Duplex 100 bar 150 C - - NPTF 1/4" Soda lime No
413S06 $231.09 each - 7.00 mm - 2205 Duplex 100 bar 150 C - - NPTF 3/8" Soda lime No
413S07 $249.15 each - 11.00 mm - 2205 Duplex 100 bar 150 C - - NPTF 1/2" Soda lime No
413S09 $264.70 each - 17.00 mm - 2205 Duplex 100 bar 150 C - - NPTF 3/4" Soda lime No
413S11 $298.87 each - 19.00 mm - 2205 Duplex 100 bar 150 C - - NPTF 1" Soda lime No
413S12 $303.54 each - 22.00 mm - 2205 Duplex 100 bar 150 C - - NPTF 1-1/4" Soda lime No
413S13 $345.94 each - 25.00 mm - 2205 Duplex 100 bar 150 C - - NPTF 1-1/2" Soda lime No
413S14 $387.90 each - 35.00 mm - 2205 Duplex 100 bar 150 C - - NPTF 2" Soda lime No
702M18 $195.03 each - 10.00 mm - 2205 Duplex 50 bar 280 C - - M18 x 1.5 Borosilicate -
702M20 $223.70 each - 12.50 mm - 2205 Duplex 50 bar 280 C - - M20 x 1.5 Borosilicate -
702M26 $275.80 each - 16.50 mm - 2205 Duplex 50 bar 280 C - - M26 x 1.5 Borosilicate -
702M27 $314.65 each - 16.50 mm - 2205 Duplex 50 bar 280 C - - M27 x 2 Borosilicate -
702M33 $356.40 each - 22.00 mm - 2205 Duplex 50 bar 280 C - - M33 x 2 Borosilicate -
702M42 $394.70 each - 24.00 mm - 2205 Duplex 50 bar 280 C - - M42 x 2 Borosilicate -
702M48 $418.25 each - 26.00 mm - 2205 Duplex 50 bar 280 C - - M48 x 2 Borosilicate -
702M60 $456.75 each - 34.00 mm - 2205 Duplex 50 bar 280 C - - M60 x 2 Borosilicate -
702M78 $498.20 each - 44.00 mm - 2205 Duplex 50 bar 280 C - - M78 x 2 Borosilicate -
703M18 $398.80 each - 10.00 mm - Hastelloy C-22 50 bar 300 C - - M18 x 1.5 Borosilicate -
703M20 $459.75 each - 12.50 mm - Hastelloy C-22 50 bar 300 C - - M20 x 1.5 Borosilicate -
703M26 $515.80 each - 16.50 mm - Hastelloy C-22 50 bar 300 C - - M26 x 1.5 Borosilicate -
703M27 $538.98 each - 16.50 mm - Hastelloy C-22 50 bar 300 C - - M27 x 2 Borosilicate -
703M33 $575.90 each - 22.00 mm - Hastelloy C-22 50 bar 300 C - - M33 x 2 Borosilicate -
703M42 $649.47 each - 24.00 mm - Hastelloy C-22 50 bar 300 C - - M42 x 2 Borosilicate -
703M48 $698.54 each - 26.00 mm - Hastelloy C-22 50 bar 300 C - - M48 x 2 Borosilicate -
703M60 $757.41 each - 34.00 mm - Hastelloy C-22 50 bar 300 C - - M60 x 2 Borosilicate -
703M78 $795.80 each - 44.00 mm - Hastelloy C-22 50 bar 300 C - - M78 x 2 Borosilicate -
704S06 $188.25 each - 10.00 mm - 2205 Duplex 50 bar 150 C - - G 3/8 Soda lime -
704S07 $206.89 each - 12.50 mm - 2205 Duplex 50 bar 150 C - - G 1/2 Soda lime -
704S09 $218.75 each - 16.50 mm - 2205 Duplex 50 bar 150 C - - G 3/4 Soda lime -
704S11 $231.55 each - 22.00 mm - 2205 Duplex 50 bar 150 C - - G 1 Soda lime -
704S12 $273.60 each - 24.00 mm - 2205 Duplex 50 bar 150 C - - G 1-1/4 Soda lime -
704S13 $284.00 each - 26.00 mm - 2205 Duplex 50 bar 150 C - - G 1-1/2 Soda lime -
704S14 $363.20 each - 34.00 mm - 2205 Duplex 50 bar 150 C - - G 2 Soda lime -
704S15 $398.35 each - 44.00 mm - 2205 Duplex 50 bar 150 C - - G 2-1/2 Soda lime -
705S06 $185.52 each - 23.00 mm - 2205 Duplex 50 bar 280 C - - G 3/8 Borosilicate -
705S07 $203.98 each - 12.50 mm - 2205 Duplex 50 bar 280 C - - G 1/2 Borosilicate -
705S09 $218.75 each - 16.50 mm - 2205 Duplex 50 bar 280 C - - G 3/4 Borosilicate -
705S11 $231.55 each - 22.00 mm - 2205 Duplex 50 bar 280 C - - G 1 Borosilicate -
705S12 $273.60 each - 24.00 mm - 2205 Duplex 50 bar 280 C - - G 1-1/4 Borosilicate -
705S13 $284.00 each - 26.00 mm - 2205 Duplex 50 bar 280 C - - G 1-1/2 Borosilicate -
705S14 $363.20 each - 34.00 mm - 2205 Duplex 50 bar 280 C - - G 2 Borosilicate -
705S15 $392.95 each - 44.00 mm - 2205 Duplex 50 bar 280 C - - G 2-1/2 Borosilicate -
706S06 $406.78 each - 10.00 mm - Hastelloy C-276 50 bar 300 C - - G 3/8 Borosilicate -
706S07 $468.95 each - 12.50 mm - Hastelloy C-276 50 bar 300 C - - G 1/2 Borosilicate -
706S09 $526.12 each - 16.50 mm - Hastelloy C-276 50 bar 300 C - - G 3/4 Borosilicate -
706S11 $549.73 each - 22.00 mm - Hastelloy C-276 50 bar 300 C - - G 1 Borosilicate -
706S12 $587.42 each - 24.00 mm - Hastelloy C-276 50 bar 300 C - - G 1-1/4 Borosilicate -
706S13 $662.49 each - 26.00 mm - Hastelloy C-276 50 bar 300 C - - G 1-1/2 Borosilicate -
706S14 $712.88 each - 34.00 mm - Hastelloy C-276 50 bar 300 C - - G 2 Borosilicate -
706S15 $772.55 each - 44.00 mm - Hastelloy C-276 50 bar 300 C - - G 2-1/2 Borosilicate -
905S13 $749.63 each 150 40.00 mm - 2205 Duplex - 280 C 1-1/2" - - Borosilicate -
905S14 $974.85 each 150 50.00 mm - 2205 Duplex - 280 C 2" - - Borosilicate -
905S15 $1,362.45 each 150 60.00 mm - 2205 Duplex - 280 C 2-1/2" - - Borosilicate -
905S16 $1,679.80 each 150 75.00 mm - 2205 Duplex - 280 C 3" - - Borosilicate -
905S18 $1,820.70 each 150 100.00 mm - 2205 Duplex - 280 C 4" - - Borosilicate -
905S21 $2,655.25 each 150 140.00 mm - 2205 Duplex - 280 C 6" - - Borosilicate -
905S23 $3,184.35 each 150 160.00 mm - 2205 Duplex - 280 C 8" - - Borosilicate -
906S13 $1,832.96 each 150 40.00 mm - Hastelloy C-22 - 300 C 1-1/2" - - Borosilicate -
906S14 $2,111.40 each 150 50.00 mm - Hastelloy C-22 - 300 C 2" - - Borosilicate -
906S15 $2,489.60 each 150 60.00 mm - Hastelloy C-22 - 300 C 2-1/2" - - Borosilicate -
906S16 $2,895.47 each 150 75.00 mm - Hastelloy C-22 - 300 C 3" - - Borosilicate -
906S18 $4,985.90 each 150 100.00 mm - Hastelloy C-22 - 300 C 4" - - Borosilicate -
906S21 $6,475.32 each 150 140.00 mm - Hastelloy C-22 - 300 C 6" - - Borosilicate -
906S23 $9,739.73 each 150 160.00 mm - Hastelloy C-22 - 300 C 8" - - Borosilicate -
907S13 $1,748.51 each 300 40.00 mm - 2205 Duplex - 280 C 1-1/2" - - Borosilicate -
907S14 $1,812.20 each 300 50.00 mm - 2205 Duplex - 280 C 2" - - Borosilicate -
907S15 $1,897.60 each 300 60.00 mm - 2205 Duplex - 280 C 2-1/2" - - Borosilicate -
907S16 $2,651.35 each 300 70.00 mm - 2205 Duplex - 280 C 3" - - Borosilicate -
907S18 $4,862.70 each 300 100.00 mm - 2205 Duplex - 280 C 4" - - Borosilicate -
908S13 $2,932.74 each 300 40.00 mm - Hastelloy C-22 - 280 C 1-1/2" - - Borosilicate -
908S14 $3,775.75 each 300 50.00 mm - Hastelloy C-22 - 280 C 2" - - Borosilicate -
908S15 $4,872.20 each 300 60.00 mm - Hastelloy C-22 - 280 C 2-1/2" - - Borosilicate -
908S16 $5,358.52 each 300 70.00 mm - Hastelloy C-22 - 280 C 3" - - Borosilicate -
908S18 $7,134.50 each 300 100.00 mm - Hastelloy C-22 - 280 C 4" - - Borosilicate -
909N03 $339.67 each - 18.00 mm - 2205 Duplex - 280 C 1-1/3" (DN16) - - Borosilicate -
909N06 $379.45 each - 35.00 mm - 2205 Duplex - 280 C 2-3/4" (DN40) - - Borosilicate -
909N08 $1,215.15 each - 60.00 mm - 2205 Duplex - 280 C 4-1/2" (DN63) - - Borosilicate -
909N10 $1,449.67 each - 70.00 mm - 2205 Duplex - 280 C 6" (DN100) - - Borosilicate -
909N12 $1,803.28 each - 90.00 mm - 2205 Duplex - 280 C 8" (DN160) - - Borosilicate -
909N13 $2,174.39 each - 120.00 mm - 2205 Duplex - 280 C 10" (DN200) - - Borosilicate -
910N03 $1,875.36 each - 18.00 mm - Hastelloy C-22 - 300 C 1-1/3" (DN16) - - Borosilicate -
910N06 $2,142.75 each - 35.00 mm - Hastelloy C-22 - 300 C 2-3/4" (DN40) - - Borosilicate -
910N08 $2,468.88 each - 60.00 mm - Hastelloy C-22 - 300 C 4-1/2" (DN63) - - Borosilicate -
910N10 $2,793.64 each - 70.00 mm - Hastelloy C-22 - 300 C 6" (DN100) - - Borosilicate -
910N12 $3,165.79 each - 90.00 mm - Hastelloy C-22 - 300 C 8" (DN160) - - Borosilicate -
910N13 $4,287.55 each - 120.00 mm - Hastelloy C-22 - 300 C 10" (DN200) - - Borosilicate -
OR110001 $6.62 each - 0.340 inch - Carbon Steel, Plated 125 psi 130 F - - NPT 1/4" Soda lime No
OR110002 $6.79 each - 0.440 inch - Carbon Steel, Plated 125 psi 130 F - - NPTF 3/8" Soda lime No
OR110003 $7.46 each - 0.560 inch - Carbon Steel, Plated 125 psi 130 F - - NPT 1/2" Soda lime No
OR110004 $9.57 each - 0.750 inch - Carbon Steel, Plated 125 psi 130 F - - NPTF 3/4" Soda lime No
OR110005 $12.26 each - 0.940 inch - Carbon Steel, Plated 125 psi 130 F - - NPT 1" Soda lime No
OR110006 $21.91 each - 1.190 inch - Carbon Steel, Plated 125 psi 130 F - - NPT 1-1/4" Soda lime No
OR110007 $25.98 each - 1.440 inch - Carbon Steel, Plated 125 psi 130 F - - NPT 1-1/2" Soda lime No
OR110008 $31.49 each - 1.880 inch - Carbon Steel, Plated 125 psi 130 F - - NPT 2" Soda lime No
Listed sight glasses in the table are products released to production. These are stable designs that have been fully engineered, tested and proven in the field in various uses.

Sight glass manufacturers offer custom configurations upon request. Th most common custom designs are high temperature and high pressure sight glasses. These are typically NPT or Flanged sight windows where the glass is brazed to the housing. For applications requiring higher operating temperatures, above 500 degrees C, the window is typically made from sapphire. It is sealed into the housing with a metal C-seal, made from Inconel(R), Alloy 718, or Waspaloy(R).

Fused sight glasses with borosilicate glass are commonly used in heaters, oil tank sights, liquid level applications where operating temperatures do not exceed 300 degrees C. For excellent optical clarity we recommend viewports and sight windows with quartz or sapphire windows polished to minimum 40-60 S-D. These sight glasses are typically used in imaging systems or in conjunction with laser sensors. Use the Filter to the left of the table to select the right sight glass based on the application parameters.