NPT Sight Glassess | Encole

NPT Sight Glassess

NPT sight glasses are typical NPT fittings having NPT male threads, where the window is encased into the metal housing forming a single-piece part. Designed up to 7000 psi pressure, these sight glasses have optical clarity suitable for imaging systems and also for looking at oil levels inside pressure vessels, or checking the color of a refrigerant. These NPT sight glasses transmit a broad spectrum of wavelengths, ranging from near-infrared, visible light, to ultraviolet. Sight glasses with quartz use material GE-124 quartz. It's a pure form of silica commonly used in semiconductor equipment. This quartz has high purity for use in a process in semiconductor reactors.

Encole

NPT-Threaded High Pressure Sight Glasses with Quartz Windows, 316 Stainless Housing

NPT-Threaded High Pressure Sight Glasses with Quartz Windows, 316 Stainless Housing
Sight window with NPT threads conforming to ASME B1.20.1. 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. Ideal choice for applications requiring no compromises in optical clarity. The window is flat on both sides, and precisely polished to surface quality of 40-20 S-D per MIL-O-13830. Because the window material is quartz, this sight glass can be used in applications requiring extended transmission ranges. Specifically, this window transmits over 50 percent of light from 217 to 3600 nm wavelengths. 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.
Aperture Dia Thread Max Operating Temp Max Operating Pressure Housing Material Window Material Mfg P/N Encole P/N Price
0.380 inch NPT 3/8 65 C 2170 psi AISI 316 Quartz 100671 265A1000 $275.99 each
0.460 inch NPT 1/2 60 C 2170 psi AISI 316 Quartz 100672 265A1001 RFQ
0.640 inch NPT 3/4 55 C 2170 psi AISI 316 Quartz 100673 265A1002 RFQ
0.860 inch NPT 1 45 C 2170 psi AISI 316 Quartz 100674 265A1003 $295.80 each
1.180 inch NPT 1-1/4 40 C 2170 psi AISI 316 Quartz 100675 265A1004 $368.87 each
1.380 inch NPT 1-1/2 35 C 2170 psi AISI 316 Quartz 100676 265A1005 $409.00 each
1.800 inch NPT 2 35 C 2170 psi AISI 316 Quartz 100677 265A1006 RFQ
0.350 inch NPT 3/8 65 C 6170 psi AISI 316 Quartz 100765 324A1000 $408.00 each
0.400 inch NPT 1/2 60 C 6170 psi AISI 316 Quartz 100766 324A1001 $426.04 each
0.550 inch NPT 3/4 55 C 6170 psi AISI 316 Quartz 100767 324A1002 RFQ
0.750 inch NPT 1 45 C 6170 psi AISI 316 Quartz 100768 324A1003 $435.90 each
1.010 inch NPT 1-1/4 40 C 6170 psi AISI 316 Quartz 100769 324A1004 RFQ
1.220 inch NPT 1-1/2 35 C 6170 psi AISI 316 Quartz 100770 324A1005 $697.58 each
1.610 inch NPT 2 35 C 6170 psi AISI 316 Quartz 100771 324A1006 RFQ

Metaglas, Herberts Industrieglas GmbH & Co. KG

NPT-Threaded Fused Sight Glasses, Borosilicate Windows

NPT-Threaded Fused Sight Glasses, Borosilicate Windows
Fusing glass to metal creates a strong, 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. These sight window have NPT threads conforming to ASME B1.20.1. For use with all common hydraulic oils, refrigeration, water heaters, and compressed air applications. Note: The image of the objects behind the glass may be distorted as the glass is slightly concave. For perfect optical clarity choose sight glasses with glass filling the entire height of the housing, where both sides of the glass are flat.
Aperture Dia Thread Max Operating Temp Max Operating Pressure Housing Material Window Material Mfg P/N Encole P/N Price
9.00 mm NPT 1/4 300 C 100 bar Hastelloy C-22 Borosilicate Met Type 61-025H 406S05 $287.54 each
10.00 mm NPT 3/8 300 C 100 bar Hastelloy C-22 Borosilicate Met Type 61-038H 406S06 $333.95 each
14.00 mm NPT 1/2 300 C 100 bar Hastelloy C-22 Borosilicate Met Type 61-050H 406S07 $378.50 each
18.00 mm NPT 3/4 300 C 100 bar Hastelloy C-22 Borosilicate Met Type 61-075H 406S09 $435.90 each
22.00 mm NPT 1 300 C 100 bar Hastelloy C-22 Borosilicate Met Type 61-100H 406S11 $540.00 each
25.00 mm NPT 1-1/4 300 C 100 bar Hastelloy C-22 Borosilicate Met Type 61-125H 406S12 $622.00 each
30.00 mm NPT 1-1/2 300 C 100 bar Hastelloy C-22 Borosilicate Met Type 61-150H 406S13 $712.00 each
37.00 mm NPT 2 300 C 100 bar Hastelloy C-22 Borosilicate Met Type 61-200H 406S14 $1370.00 each
55.00 mm NPT 3 300 C 100 bar Hastelloy C-22 Borosilicate Met Type 61-300H 406S16 $2321.00 each
9.00 mm NPT 1/4 280 C 100 bar 2205 Duplex Borosilicate Met Type 61-025S 405S05 $181.27 each
10.00 mm NPT 3/8 280 C 100 bar 2205 Duplex Borosilicate Met Type 61-038S 405S06 $189.55 each
14.00 mm NPT 1/2 280 C 100 bar 2205 Duplex Borosilicate Met Type 61-050S 405S07 $198.32 each
18.00 mm NPT 3/4 280 C 100 bar 2205 Duplex Borosilicate Met Type 61-075S 405S09 $209.24 each
22.00 mm NPT 1 280 C 100 bar 2205 Duplex Borosilicate Met Type 61-100S 405S11 $218.53 each
25.00 mm NPT 1-1/4 280 C 100 bar 2205 Duplex Borosilicate Met Type 61-125S 405S12 $288.89 each
30.00 mm NPT 1-1/2 280 C 100 bar 2205 Duplex Borosilicate Met Type 61-150S 405S13 $291.08 each
37.00 mm NPT 2 280 C 100 bar 2205 Duplex Borosilicate Met Type 61-200S 405S14 $386.59 each
55.00 mm NPT 3 280 C 100 bar 2205 Duplex Borosilicate Met Type 61-300S 405S16 $496.94 each
9.00 mm NPTF 1/4 280 C 100 bar 2205 Duplex Borosilicate Met Type 61-F-025S 408S05 $181.27 each
11.00 mm NPTF 3/8 280 C 100 bar 2205 Duplex Borosilicate Met Type 61-F-038S 408S06 $189.55 each
14.00 mm NPTF 1/2 150 C 100 bar 2205 Duplex Borosilicate Met Type 61-F-050S 408S07 $198.32 each
18.00 mm NPTF 3/4 150 C 100 bar 2205 Duplex Borosilicate Met Type 61-F-075S 408S09 $209.24 each
22.00 mm NPTF 1 150 C 100 bar 2205 Duplex Borosilicate Met Type 61-F-100S 408S11 $218.53 each
25.00 mm NPTF 1-1/4 150 C 100 bar 2205 Duplex Borosilicate Met Type 61-F-125S 408S12 $288.89 each
30.00 mm NPTF 1-1/2 150 C 100 bar 2205 Duplex Borosilicate Met Type 61-F-150S 408S13 $291.08 each
37.00 mm NPTF 2 150 C 100 bar 2205 Duplex Borosilicate Met Type 61-F-200S 408S14 $386.59 each
55.00 mm NPTF 3 150 C 100 bar 2205 Duplex Borosilicate Met Type 61-F-300S 408S16 $496.94 each
9.00 mm NPTF 1/4 300 C 100 bar Hastelloy C-22 Borosilicate Met Type 61-F-025H 409S05 $447.72 each
10.00 mm NPTF 3/8 150 C 100 bar Hastelloy C-22 Borosilicate Met Type 61-F-038H 409S06 $465.13 each
14.00 mm NPTF 1/2 300 C 100 bar Hastelloy C-22 Borosilicate Met Type 61-F-050H 409S07 $478.68 each
18.00 mm NPTF 3/4 300 C 100 bar Hastelloy C-22 Borosilicate Met Type 61-F-075H 409S09 $496.08 each
22.00 mm NPTF 1 150 C 100 bar Hastelloy C-22 Borosilicate Met Type 61-F-100H 409S11 $529.43 each
25.00 mm NPTF 1-1/4 300 C 100 bar Hastelloy C-22 Borosilicate Met Type 61-F-125H 409S12 $585.38 each
30.00 mm NPTF 1-1/2 300 C 100 bar Hastelloy C-22 Borosilicate Met Type 61-F-150H 409S13 $647.68 each
37.00 mm NPTF 2 300 C 100 bar Hastelloy C-22 Borosilicate Met Type 61-F-200H 409S14 $738.95 each
55.00 mm NPTF 3 300 C 100 bar Hastelloy C-22 Borosilicate Met Type 61-F-300H 409S16 $769.82 each

Metaglas, Herberts Industrieglas GmbH & Co. KG

Fused NPT Sight Glasses, Duplex Steel 2205, Sodalime, Full Glass Height

Fused NPT Sight Glasses, Duplex Steel 2205, Sodalime, Full Glass Height
Soda lime glass is fused to a duplex steel 2205 housing, where the glass extends the entire height of the fitting. Glass is flush with both ends of the housing. Sides of the glass are flat and lapped to approximately S-D: 80-40, an optical finish of a typical room window. This optical clarity is suitable for undistorted viewing though the sight glass. For visual inspection, machine vision, optical sensors, in use with all common hydraulic oils, refrigeration, water heaters, and compressed air applications. Connections are NPT or NPTF (Dryseal) threads conforming to ASME B1.20.1.
Aperture Dia Thread Max Operating Temp Max Operating Pressure Housing Material Window Material Mfg P/N Encole P/N Price
5.00 mm NPT 1/4 150 C 100 bar 2205 Duplex Soda lime Met 62-025S 410S05 $214.08 each
7.00 mm NPT 3/8 150 C 100 bar 2205 Duplex Soda lime Met 62-038S 410S06 $231.05 each
11.00 mm NPT 1/2 150 C 100 bar 2205 Duplex Soda lime Met 62-05S 410S07 $248.12 each
17.00 mm NPT 3/4 150 C 100 bar 2205 Duplex Soda lime Met 62-075S 410S09 $262.12 each
19.00 mm NPT 1 150 C 100 bar 2205 Duplex Soda lime Met 62-100S 410S11 $283.15 each
22.00 mm NPT 1-1/4 150 C 100 bar 2205 Duplex Soda lime Met 62-125S 410S12 $288.05 each
25.00 mm NPT 1-1/2 150 C 100 bar 2205 Duplex Soda lime Met 62-150S 410S13 $299.25 each
35.00 mm NPT 2 150 C 100 bar 2205 Duplex Soda lime Met 62-200S 410S14 $381.23 each
5.00 mm NPTF 1/4 150 C 100 bar 2205 Duplex Soda lime Met 62F-025S 413S05 $214.80 each
7.00 mm NPTF 3/8 150 C 100 bar 2205 Duplex Soda lime Met 62F-038S 413S06 $231.09 each
11.00 mm NPTF 1/2 150 C 100 bar 2205 Duplex Soda lime Met 62F-050S 413S07 $249.15 each
17.00 mm NPTF 3/4 150 C 100 bar 2205 Duplex Soda lime Met 62F-075S 413S09 $264.70 each
19.00 mm NPTF 1 150 C 100 bar 2205 Duplex Soda lime Met 62F-100S 413S11 $298.87 each
22.00 mm NPTF 1-1/4 150 C 100 bar 2205 Duplex Soda lime Met 62F-125S 413S12 $303.54 each
25.00 mm NPTF 1-1/2 150 C 100 bar 2205 Duplex Soda lime Met 62F-150S 413S13 $345.94 each
35.00 mm NPTF 2 150 C 100 bar 2205 Duplex Soda lime Met 62F-200S 413S14 $387.90 each

Oil-Rite Corporation

Low Cost Fused NPT-Threaded Sight Glasses, Zinc-Plated Carbon Steel. From $6.00

Low Cost Fused NPT-Threaded Sight Glasses, Zinc-Plated Carbon Steel. From $6.00
Sodalime glass is fused to a plain carbon steel body which is Zinc-plated for added corrosion resistance. These sight glasses can be threaded directly into a pipe, or a boss welded to a pipe with subsequent threads cut into the boss. These are ideal budget sight glasses/viewports for visual observation of liquid levels and their colors. Applications include hydraulic systems with mineral oils, diesel, and other common petrochemicals where low cost is required. Not suitable for cycling high temperature, high pressure or aggressively corrosive applications.
Aperture Dia Thread Max Operating Temp Max Operating Pressure Housing Material Window Material Mfg P/N Encole P/N Price
0.340 inch NPT 1/4 130 F 125 psi Carbon Steel, Plated Soda lime A2890-1 OR110001 $6.62 each
0.560 inch NPT 1/2 130 F 125 psi Carbon Steel, Plated Soda lime A2890-3 OR110003 $7.46 each
0.940 inch NPT 1 130 F 125 psi Carbon Steel, Plated Soda lime A2890-5 OR110005 $12.26 each
1.190 inch NPT 1-1/4 130 F 125 psi Carbon Steel, Plated Soda lime A2890-6 OR110006 $21.91 each
1.440 inch NPT 1-1/2 130 F 125 psi Carbon Steel, Plated Soda lime A2890-7 OR110007 $25.98 each
1.880 inch NPT 2 130 F 125 psi Carbon Steel, Plated Soda lime A2890-8 OR110008 $31.49 each
0.440 inch NPTF 3/8 130 F 125 psi Carbon Steel, Plated Soda lime A2890-2 OR110002 $6.79 each
0.750 inch NPTF 3/4 130 F 125 psi Carbon Steel, Plated Soda lime A2890-4 OR110004 $9.57 each

Oil-Rite Corporation

Stainless Steel Gasketed Glass Sights with NPT Threads

Stainless Steel Gasketed Glass Sights with NPT Threads
303 Stainless Steel Gasketed Glass Sight for visual observation of liquid levels and their condition. This sight glass is typically used in any application where oil or fluid inspection is essential. The housing is a 303 Stainless Steel fitting with U.S. standard NPT threads conforming to ASME B1.20.1. Use traditional installation tools and Teflon tape or pipe sealant. These sights have Buna-N internal seal with good chemical compatibility with Petroleum oils and fluids; Cold Water; Silicone greases and oils; Dibasic Acid Ester (Diester) based lubricants (MIL-L-7808); Ethylene glycol base fluids (Hydrolubes). Not Recommended for: Halogenated hydrocarbons (carbon tetrachloride, trichloroethylene); Nitro hydrocarbons (nitrobenzene, aniline); Phosphate ester hydraulic fluids (Skydrol, Fyrquel, Pydraul); Ketones (MEK, acetone); Strong Acids Ozone; Automotive brake fluid.
Aperture Dia Thread Max Operating Temp Max Operating Pressure Housing Material Window Material Mfg P/N Encole P/N Price
0.312 inch NPT 1/4 225 F 125 psi AISI 303 Soda lime B4763-01B 330A1000 $59.26 per package of 2
0.469 inch NPT 3/8 225 F 125 psi AISI 303 Soda lime B4763-02B 330A1001 $65.32 per package of 2
0.594 inch NPT 1/2 225 F 125 psi AISI 303 Soda lime B4763-03B 330A1003 $77.32 per package of 2
0.781 inch NPT 3/4 225 F 125 psi AISI 303 Soda lime B4763-04B 330A1005 $85.32 per package of 2
1.000 inch NPT 1 225 F 100 psi AISI 303 Soda lime B4763-05B 330A1007 $93.78 per package of 2
1.593 inch NPT 1-1/4 225 F 75 psi AISI 303 Soda lime B4763-06B 330A1009 $123.70 per package of 2
1.531 inch NPT 1-1/2 225 F 50 psi AISI 303 Soda lime B4763-07B 330A1011 $72.67 each
1.969 inch NPT 2 225 F 50 psi AISI 303 Soda lime B4763-08B 330A1013 $86.75 each

Oil-Rite Corporation

Stainless Steel Gasketed Glass Sights with Reflector, NPT Threads

Stainless Steel Gasketed Glass Sights with Reflector, NPT Threads
Reflector behind the glass helps see oil levels, presence of liquids, color, quality of a fluid. 303 Stainless Steel Gasketed Glass Sight for visual observation of liquid levels and their condition. These sight glasses are typically used in any application where oil or fluid inspection is essential. The housing is a 303 Stainless Steel fitting with U.S. standard NPT threads conforming to ASME B1.20.1. Use traditional installation tools and Teflon tape or pipe sealant. These sight glasses have a Buna-N internal seal for good chemical compatibility with Petroleum oils and fluids; Cold Water; Silicone greases and oils; Dibasic Acid Ester (Diester) based lubricants (MIL-L-7808); Ethylene glycol base fluids (Hydrolubes). Not Recommended for: Halogenated hydrocarbons (carbon tetrachloride, trichloroethylene); Nitro hydrocarbons (nitrobenzene, aniline); Phosphate ester hydraulic fluids (Skydrol, Fyrquel, Pydraul); Ketones (MEK, acetone); Strong Acids Ozone; Automotive brake fluid.
Aperture Dia Thread Max Operating Temp Max Operating Pressure Housing Material Window Material Mfg P/N Encole P/N Price
0.469 inch NPT 3/8 225 F 125 psi AISI 303 Soda lime B4763-12B 330A1002 $71.32 per package of 2
0.594 inch NPT 1/2 225 F 125 psi AISI 303 Soda lime B4763-13B 330A1004 $81.32 per package of 2
0.781 inch NPT 3/4 225 F 125 psi AISI 303 Soda lime B4763-14B 330A1006 $93.32 per package of 2
1.000 inch NPT 1 225 F 100 psi AISI 303 Soda lime B4763-15B 330A1008 $95.32 per package of 2
1.593 inch NPT 1-1/4 225 F 75 psi AISI 303 Soda lime B4763-16B 330A1010 $64.67 each
1.531 inch NPT 1-1/2 225 F 50 psi AISI 303 Soda lime B4763-17B 330A1012 $74.85 each
1.969 inch NPT 2 225 F 50 psi AISI 303 Soda lime B4763-18B 330A1014 $89.65 each