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System of Measurement System of Measurement |
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Maximum Temperature Maximum Temperature |
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Maximum Pressure Maximum Pressure |
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Window Diameter Window Diameter |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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 | Tube |
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Surface Smoothness Surface Smoothness |
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Maximum Vacuum Maximum Vacuum |
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Sights for Quick-Clamp Sanitary Tube Fittings
Gasket, Quick-Clamp Fitting, And
Tube Fitting (All Sold Separately)
Monitor food, brewery, chemical, pharmaceutical, and biotech processing lines with these sights that attach to quick-clamp fittings for fast installation and easy removal for cleaning. All have a one-piece design, so there are no crevices where bacteria can grow. A
304 stainless steel sights have a ring that's embedded around their shatter-resistant plastic window. This design protects the sights from chipping or cracking while under the stress of the quick-clamp fitting. All withstand harsh cleaners and sanitizers for clean-in-place (CIP) and steam-in-place (SIP) applications. They do not contain Bisphenol A (BPA), Bisphenol B (BPB), or BPA derivatives (BPX), which are chemicals that can contaminate your process lines. All meet ASME BPE design standards for bioprocessing equipment that ensure purity and safety.
For superior strength and reliability, choose 2205 stainless steel sights. All have a glass window that’s melted around a high-strength ring, so they won’t shatter, leak, or lose their shape under high pressure, heat, chemicals, or impact. They withstand harsh cleaners and sanitizers for clean-in-place (CIP) and steam-in-place (SIP) applications. USP Class VI and TUV Rheinland Certified, these sights meet safety standards in the U.S. and Europe. They also meet DIN standards for glass materials used in sights, ASTM standards for materials used in boilers and pressure vessels, and ASME BPE design standards for bioprocessing equipment that ensure purity and safety.
For technical drawings and 3-D models, click on a part number.
Temp. Range, °F | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| For Tube OD | For Flange OD | Window Dia. | Max. Pressure | Min. | Max. | For Use With | Features | Specifications Met | Each | |
304 Stainless Steel Ring with Plastic Window | ||||||||||
| 1" | 1.98" | 1 1/4" | 150 psi @ 70° F | Not Rated | 200° | Water, Acetic Acid, Air, Alcohol-Based Solvents, Compressed Air, Salt Water, Steam | One-Piece Construction | ASME BPE | 0000000 | 000000 |
| 2" | 2.52" | 1 3/4" | 150 psi @ 70° F | Not Rated | 200° | Water, Acetic Acid, Air, Alcohol-Based Solvents, Compressed Air, Salt Water, Steam | One-Piece Construction | ASME BPE | 0000000 | 00000 |
| 3" | 3.58" | 2 3/8" | 60 psi @ 70° F | Not Rated | 200° | Water, Acetic Acid, Air, Alcohol-Based Solvents, Compressed Air, Salt Water, Steam | One-Piece Construction | ASME BPE | 0000000 | 000000 |
| 4" | 4.68" | 3 1/4" | 30 psi @ 70° F | Not Rated | 200° | Water, Acetic Acid, Air, Alcohol-Based Solvents, Compressed Air, Salt Water, Steam | One-Piece Construction | ASME BPE | 0000000 | 000000 |
2205 Stainless Steel Ring with Glass Window | ||||||||||
| 1", 1 1/2" | 1.98" | 1" | 230 psi @ 70° F | -40° | 500° | Water, Hydraulic Fluid, Diesel Fuel, Acetic Acid, Air, Alcohol-Based Solvents, Beverage, Chemicals, Compressed Air, Food, Fuel Oil, Gasoline, Inert Gas, Ketone, Oil, Salt Water, Steam | One-Piece Construction | ASME BPE, ASTM A479, DIN 7079, DIN 7080, TUV Rheinland Certified, USP Class VI | 0000000 | 000000 |
| 2" | 2.52" | 1 3/16" | 230 psi @ 70° F | -40° | 500° | Water, Hydraulic Fluid, Diesel Fuel, Acetic Acid, Air, Alcohol-Based Solvents, Beverage, Chemicals, Compressed Air, Food, Fuel Oil, Gasoline, Inert Gas, Ketone, Oil, Salt Water, Steam | One-Piece Construction | ASME BPE, ASTM A479, DIN 7079, DIN 7080, TUV Rheinland Certified, USP Class VI | 0000000 | 000000 |
| 3" | 3.58" | 1 1/2" | 150 psi @ 70° F | -40° | 500° | Water, Hydraulic Fluid, Diesel Fuel, Acetic Acid, Air, Alcohol-Based Solvents, Beverage, Chemicals, Compressed Air, Food, Fuel Oil, Gasoline, Inert Gas, Ketone, Oil, Salt Water, Steam | One-Piece Construction | ASME BPE, ASTM A479, DIN 7079, DIN 7080, TUV Rheinland Certified, USP Class VI | 0000000 | 000000 |
| 4" | 4.68" | 2 3/16" | 150 psi @ 70° F | -40° | 500° | Water, Hydraulic Fluid, Diesel Fuel, Acetic Acid, Air, Alcohol-Based Solvents, Beverage, Chemicals, Compressed Air, Food, Fuel Oil, Gasoline, Inert Gas, Ketone, Oil, Salt Water, Steam | One-Piece Construction | ASME BPE, ASTM A479, DIN 7079, DIN 7080, TUV Rheinland Certified, USP Class VI | 0000000 | 000000 |
High-Vacuum Flanged Sights
Add a window to your high-vacuum system. With a pane of borosilicate glass sealed inside a high-vacuum CF flange, these sights bolt onto vacuum chambers, tee fittings, and manifolds. Use a copper gasket (sold separately) to create a seal. Not for use with pressure. To illuminate dark interiors, attach an optional light to the flange with set screws.
For technical drawings and 3-D models, click on a part number.
Window | Bolt Holes | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Trade Number | Flange OD | For Tube OD | High Vacuum Connection Type | Max. Vacuum | Dia. | Material | Bolt Circle Dia. | No. of | Dia. | Max. Temp., °F | Each | |
304 Stainless Steel | ||||||||||||
| 16 | 1 21/64" | 3/4" | CF | 1 × 10 -11 torr @ 72° F | 5/8" | Glass | 1 1/16" | 6 | 11/64" | 750° | 0000000 | 0000000 |
| 40 | 2 3/4" | 1 1/2" | CF | 1 × 10 -11 torr @ 72° F | 1 3/8" | Glass | 2 5/16" | 6 | 17/64" | 750° | 0000000 | 000000 |
| 63 | 4 1/2" | 2 1/2" | CF | 1 × 10 -11 torr @ 72° F | 2 5/8" | Glass | 3 5/8" | 8 | 21/64" | 750° | 0000000 | 000000 |
| 100 | 6" | 4" | CF | 1 × 10 -11 torr @ 72° F | 3 7/8" | Glass | 5 1/8" | 16 | 21/64" | 750° | 0000000 | 000000 |
High-Vacuum Sights for Quick-Clamp Fittings
Designed with quick-clamp (KF) connections, these sights connect to a port on a high-vacuum chamber, so you can monitor what's happening inside. A sleeve seals the glass window to the body of the sight to prevent leaks. To connect to your chamber, you'll need a clamp and a ring (sold separately). Not for use in pressure applications.
For technical drawings and 3-D models, click on a part number.
Window | |||||||||
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| Trade Number | For Flange OD | For Tube OD | High Vacuum Connection Type | Max. Vacuum | Dia. | Material | Max. Temp., °F | Each | |
304 Stainless Steel | |||||||||
| 16 | 1.18" | 3/4" | ISO-KF | 1 × 10 -9 torr @ 72° F | 5/8" | Glass | 390° | 0000000 | 0000000 |
| 25 | 1.57" | 1" | ISO-KF | 1 × 10 -9 torr @ 72° F | 7/8" | Glass | 390° | 0000000 | 000000 |
| 40 | 2.16" | 1 1/2" | ISO-KF | 1 × 10 -9 torr @ 72° F | 7/8" | Glass | 390° | 0000000 | 000000 |
| 50 | 2.95" | 2" | ISO-KF | 1 × 10 -9 torr @ 72° F | 1 3/8" | Glass | 390° | 0000000 | 000000 |
| Trade Number | For Flange OD | For Tube OD | Material | Max. Vacuum | High Vacuum Connection Type | Each | |
| 10, 16 | 1.18" | 1/2", 3/4" | Aluminum | 1 × 10^-7 torr @ 72° F | ISO-KF | 00000000 | 00000 |
| 25 | 1.57" | 1" | Aluminum | 1 × 10^-7 torr @ 72° F | ISO-KF | 0000000 | 00000 |
| 40 | 2.16" | 1 1/2" | Aluminum | 1 × 10^-7 torr @ 72° F | ISO-KF | 0000000 | 00000 |
| 50 | 2.95" | 2" | Aluminum | 1 × 10^-7 torr @ 72° F | ISO-KF | 0000000 | 00000 |
| Trade Number | For Flange OD | For Tube OD | Inner Ring Material | Max. Vacuum | High Vacuum Connection Type | Each | |
| 16 | 1.18" | 3/4" | 304 Stainless Steel | 1 × 10^-7 torr @ 72° F | ISO-KF | 00000000 | 00000 |
| 25 | 1.57" | 1" | 304 Stainless Steel | 1 × 10^-7 torr @ 72° F | ISO-KF | 0000000 | 0000 |
| 40 | 2.16" | 1 1/2" | 304 Stainless Steel | 1 × 10^-7 torr @ 72° F | ISO-KF | 0000000 | 00000 |
| 50 | 2.95" | 2" | 304 Stainless Steel | 1 × 10^-7 torr @ 72° F | ISO-KF | 0000000 | 00000 |
Flow Sights with Barbed Fittings for Water, Oil, Air, and Inert Gas
Monitor liquid movement, color, and clarity in tube systems—this sight has barbed fittings that slide into soft plastic and rubber tubing. It has a clear body and a ball indicator that moves when flow is present so you can visually confirm flow from a distance.
Indicator | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| For Tube ID | Temp. Range, °F | End-to-End Lg. | Ht. | Max. Pressure | Direction of Flow | Material | Color | Each | |
Polycarbonate Plastic Body | |||||||||
| 1/4" to 3/8" | 32° to 180° | 3" | 2 1/4" | 10 psi @ 70° F | Bottom to Top, Left to Right, Right to Left, Top to Bottom | Nylon Plastic | White | 0000000 | 000000 |
Flow Sights for High Vacuum
Peer through the glass on these flow sights to see what’s happening in your high-vacuum line. These flow sights are often used to check the progress of fluids, gases, or probes entering the vacuum system, or to confirm that contaminants have been pumped out. They can also be used as an insulator or low-voltage electrical break on high-vacuum tube lines. The body is 304 stainless steel, which emits less gas into a vacuum than other types of metal and does not corrode in water. The glass tube and stainless steel body are fused together to eliminate leaks. These flow sights are also known as glass tube adapters. Not for use in pressure applications.
Bolt flow sights with a flanged connection to another flange with a copper gasket (sold separately) in between. These flanges are also known as CF, Conflat, and UHV connections.
Join flow sights with quick-clamp connections to your line with a clamp and a ring (sold separately). They are also known as KF, QF, and NW fittings.
Window | |||||||||||
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| For Tube OD | Flange OD | Trade Number | High Vacuum Connection Type | Temp. Range, °F | Dia. | Lg. | End-to-End Lg. | Ht. | Max. Vacuum | Each | |
304 Stainless Steel Body | |||||||||||
| 3/4" | 1 21/64" | 16 | CF | -320° to 750° | 3/4" | 1" | 4 3/8" | 1 21/64" | 1 × 10 -10 torr @ 72° F | 0000000 | 0000000 |
| 3/4" | 1 21/64" | 16 | CF | -320° to 750° | 3/4" | 6" | 9 3/8" | 1 21/64" | 1 × 10 -10 torr @ 72° F | 0000000 | 000000 |
| 1 1/2" | 2 3/4" | 40 | CF | -320° to 750° | 1 1/2" | 1" | 4 3/8" | 2 3/4" | 1 × 10 -10 torr @ 72° F | 0000000 | 000000 |
| 1 1/2" | 2 3/4" | 40 | CF | -320° to 750° | 1 1/2" | 6" | 9 3/8" | 2 3/4" | 1 × 10 -10 torr @ 72° F | 0000000 | 000000 |
| 2 1/2" | 4 1/2" | 63 | CF | -320° to 750° | 2 1/2" | 1" | 5 1/8" | 4 1/2" | 1 × 10 -10 torr @ 72° F | 0000000 | 00000000 |
| 2 1/2" | 4 1/2" | 63 | CF | -320° to 750° | 2 1/2" | 6" | 10 1/8" | 4 1/2" | 1 × 10 -10 torr @ 72° F | 0000000 | 00000000 |
| 4" | 6" | 100 | CF | -320° to 750° | 4" | 1" | 5 1/8" | 6" | 1 × 10 -10 torr @ 72° F | 0000000 | 00000000 |
| 4" | 6" | 100 | CF | -320° to 750° | 4" | 6" | 10 1/8" | 6" | 1 × 10 -10 torr @ 72° F | 0000000 | 00000000 |
Window | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| For Tube OD | Flange OD | Trade Number | High Vacuum Connection Type | Temp. Range, °F | Dia. | Lg. | End-to-End Lg. | Ht. | Window Material | Max. Vacuum | Each | |
304 Stainless Steel Body | ||||||||||||
| 3/4" | 1.18" | 16 | ISO-KF | 0° to 390° | 3/4" | 1" | 4 3/8" | 1 3/16" | Glass | 1 × 10 -8 torr @ 72° F | 0000000 | 0000000 |
| 3/4" | 1.18" | 16 | ISO-KF | 0° to 390° | 3/4" | 6" | 9 3/8" | 1 3/16" | Glass | 1 × 10 -8 torr @ 72° F | 0000000 | 000000 |
| 1" | 1.57" | 25 | ISO-KF | 0° to 390° | 1" | 1" | 4 3/8" | 1 9/16" | Glass | 1 × 10 -8 torr @ 72° F | 0000000 | 000000 |
| 1" | 1.57" | 25 | ISO-KF | 0° to 390° | 1" | 6" | 9 3/8" | 1 9/16" | Glass | 1 × 10 -8 torr @ 72° F | 0000000 | 000000 |
| 1 1/2" | 2.16" | 40 | ISO-KF | 0° to 390° | 1 1/2" | 1" | 4 3/8" | 2 3/16" | Glass | 1 × 10 -8 torr @ 72° F | 0000000 | 000000 |
| 1 1/2" | 2.16" | 40 | ISO-KF | 0° to 390° | 1 1/2" | 6" | 9 3/8" | 2 3/16" | Glass | 1 × 10 -8 torr @ 72° F | 0000000 | 000000 |
| 2" | 2.95" | 50 | ISO-KF | 0° to 390° | 2" | 1" | 5 1/8" | 3" | Glass | 1 × 10 -8 torr @ 72° F | 0000000 | 000000 |
| 2" | 2.95" | 50 | ISO-KF | 0° to 390° | 2" | 6" | 10 1/8" | 3" | Glass | 1 × 10 -8 torr @ 72° F | 0000000 | 00000000 |
| For Tube OD | For Flange OD | Trade Number | High Vacuum Connection Type | Material | Nut Material | Temp. Range, °F | Max. Vacuum | Specifications Met | Each | |
with Spring Loaded | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 3/4" | 1.18" | 16 | ISO-KF | Aluminum | __ | 0° to 300° | 1 × 10 -7 torr @ 72° F | ISO 2861 | 0000000 | 000000 |
with Wing Nut | ||||||||||
| 3/4" | 1.18" | 16 | ISO-KF | Aluminum | Zinc Alloy | 0° to 300° | 1 × 10 -7 torr @ 72° F | ISO 2861 | 00000000 | 0000 |
| 1" | 1.57" | 25 | ISO-KF | Aluminum | Zinc Alloy | 0° to 300° | 1 × 10 -7 torr @ 72° F | ISO 2861 | 0000000 | 00000 |
| 1 1/2" | 2.16" | 40 | ISO-KF | Aluminum | Zinc Alloy | 0° to 300° | 1 × 10 -7 torr @ 72° F | ISO 2861 | 0000000 | 00000 |
| 2" | 2.95" | 50 | ISO-KF | Aluminum | Zinc Alloy | 0° to 300° | 1 × 10 -7 torr @ 72° F | ISO 2861 | 0000000 | 00000 |
Material | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| For Tube OD | For Flange OD | Trade Number | High Vacuum Connection Type | O-Ring | Inner Ring | Temp. Range, °F | Max. Vacuum | Specifications Met | Each | |
| 3/4" | 1.18" | 16 | ISO-KF | Fluoroelastomer Rubber | 304 Stainless Steel | 0° to 300° | 1 × 10 -7 torr @ 72° F | ISO 2861 | 00000000 | 00000 |
| 1" | 1.57" | 25 | ISO-KF | Fluoroelastomer Rubber | 304 Stainless Steel | 0° to 300° | 1 × 10 -7 torr @ 72° F | ISO 2861 | 0000000 | 0000 |
| 1 1/2" | 2.16" | 40 | ISO-KF | Fluoroelastomer Rubber | 304 Stainless Steel | 0° to 300° | 1 × 10 -7 torr @ 72° F | ISO 2861 | 0000000 | 00000 |
| 2" | 2.95" | 50 | ISO-KF | Fluoroelastomer Rubber | 304 Stainless Steel | 0° to 300° | 1 × 10 -7 torr @ 72° F | ISO 2861 | 0000000 | 00000 |