Low Cost NPT Sight Glass

npt sight glass

Budget sight glasses for general applications. Sodalime glass is fused to a plain carbon steel body which is Nickel-plated or Zinc-plated for added corrosion resistance. These sight glasses can be threaded directly into a pipe, or a boss welded to a pipe with cut threads. Ideal 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 or for R744 systems.

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

 


Thread Size, NPT Hex, inch Aperture, inch H, inch L, inch D, inch Max Operating Pressure, psi Min Operating Temperature, C Max Operating Temperature, C Transmitted Wavelength, nm Encole Part Number Price
1/4" 5/8 0.340 0.630 0.440 0.370 125 -30.0 130.0 410 to 1,800 OR110001 $6.62 each
1/2" 15/16 0.560 0.780 0.570 0.470 125 -30.0 130.0 410 to 1,800 OR110003 $7.46 each
1" 1-3/8 0.940 1.070 0.740 1.000 125 -30.0 130.0 410 to 1,800 OR110005 $12.26 each
1-1/4" 1-3/4 1.190 1.210 0.800 1.290 125 -30.0 130.0 410 to 1,800 OR110006 $21.91 each
1-1/2" 2 1.440 1.220 0.800 1.530 125 -30.0 130.0 410 to 1,800 OR110007 $25.98 each
2" 2-1/2 1.880 1.280 0.870 1.960 125 -30.0 130.0 410 to 1,800 OR110008 $31.49 each

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nptf sight glass, cheap

Similar to the NPT sightglasses in a carbon steel housing, these sights have NPTF (Dryseal) threads. Typical uses include fuel & oil applications where NPTF threads can be sealed without a thread sealant. Especially suitable for low pressure applications with viscous fluids.

 

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

 


Thread Size, NPTF Hex, inch Aperture, inch H, inch L, inch D, inch Max Operating Pressure, psi Min Operating Temperature, C Max Operating Temperature, C Transmitted Wavelength, nm Encole Part Number Price
3/8" 3/4 0.440 0.750 0.560 0.470 125 -30.0 130.0 410 to 1,800 OR110002 $6.79 each
3/4" 1-1/16 0.750 1.060 0.740 0.780 125 -30.0 130.0 410 to 1,800 OR110004 $9.57 each

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npt sight glass

303 Stainless Steel Gasketed Window Sights for quick visual observation of liquid levels, and also liquid color. Choose from sights with a reflector or plain.

 

These sights have better resistant to corrosion and rust than sight windows made from carbon steel. It maintains its appearance over long periods and minimizes unwanted bonding between parts. These window sights may be mounted vertically or horizontally in any position and into any corresponding pipe with standard National Pipe Thread Taper (NPT) threads - a U.S. standard. They can be used to display fluid motion or mechanical movements, as well as to view and perform tests in a safe enclosure.

 

Specific uses include fluid sighting on hydraulic tanks, pressure vessels, reservoirs, packaged power equipment, hydraulic lines and dipping. Their use can be applied to any application where oil or fluid inspection is essential.



Thread Size, NPT Hex, inch Aperture Dia. inch O-Ring Material with Reflector? Max Operating Pressure, psi Min Operating Temperature, F Max Operating Temperature, F Encole Part Number Price
1/4" 5/8" 5/16" Buna-N No 125 -55.0 225.0 330A1000 $26.63 each
3/8" 3/4" 15/32" Buna-N No 125 -55.0 225.0 330A1001 $31.66 each
3/8" 3/4" 15/32" Buna-N Yes 125 -55.0 225.0 330A1002 $34.66 each
1/2" 15/16" 19/32" Buna-N No 125 -55.0 225.0 330A1003 $37.66 each
1/2" 15/16" 19/32" Buna-N Yes 125 -55.0 225.0 330A1004 $39.66 each
3/4" 1-1/16" 25/32" Buna-N No 125 -55.0 225.0 330A1005 $42.66 each
3/4" 1-1/16" 25/32" Buna-N Yes 125 -55.0 225.0 330A1006 $46.66 each
1" 1-3/8" 1" Buna-N No 100 -55.0 225.0 330A1007 $46.89 each
1" 1-3/8" 1" Buna-N Yes 100 -55.0 225.0 330A1008 $47.66 each
1-1/4" 1-3/4" 1-19/64" Buna-N No 50 -55.0 225.0 330A1009 $61.85 each
1-1/4" 1-3/4" 1-19/64" Buna-N Yes 50 -55.0 225.0 330A1010 $64.67 each
1-1/2" 2" 1-17/32" Buna-N No 50 -55.0 225.0 330A1011 $72.67 each
1-1/2" 2" 1-17/32" Buna-N Yes 50 -55.0 225.0 330A1012 $74.85 each
2" 2-1/2" 1-31/32" Buna-N No 50 -55.0 225.0 330A1013 $86.75 each
2" 2-1/2" 1-31/32" Buna-N Yes 50 -55.0 225.0 330A1014 $89.65 each

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