Through-Wall Sights
Mount these sights from the inside of your tank and secure with a lock nut. They install through unthreaded holes in tank walls.
Sights for dark liquid have a reflector that makes liquid easy to see, especially in low-light conditions.
303 stainless steel sights are more corrosion resistant than aluminum sights.
Temp. Range, °F | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| For Hole Dia. | Window Dia. | Hex Size | For Max. Tank Wall Thick. | Max. Pressure | Min. | Max. | For Use With | Window Material | Seal Material | Includes | Each | |
For Clear Liquid | ||||||||||||
Aluminum  | ||||||||||||
| 3/4" | 1/2" | 7/8" | 1/4" | 50 psi @ 70° F | -40° | 180° | Water, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | Lock Nut | 0000000 | 000000 |
| 1" | 3/4" | 1 1/8" | 1/4" | 50 psi @ 70° F | -40° | 180° | Water, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | Lock Nut | 0000000 | 00000 |
| 1 1/4" | 1" | 1 3/8" | 1/4" | 25 psi @ 70° F | -40° | 180° | Water, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | Lock Nut | 0000000 | 00000 |
| 1 7/8" | 1 3/8" | 2" | 1/4" | 25 psi @ 70° F | -40° | 180° | Water, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | Lock Nut | 0000000 | 00000 |
| 2 3/8" | 1 7/8" | 2 5/8" | 1/4" | 10 psi @ 70° F | -40° | 180° | Water, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | Lock Nut | 0000000 | 00000 |
303 Stainless Steel | ||||||||||||
| 5/8" | 7/16" | 13/16" | 3/16" | 125 psi @ 70° F | 0° | 225° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | Lock Nut | 0000000 | 00000 |
| 3/4" | 9/16" | 15/16" | 3/16" | 125 psi @ 70° F | 0° | 225° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | Lock Nut | 0000000 | 00000 |
| 1" | 13/16" | 1 1/4" | 3/16" | 125 psi @ 70° F | 0° | 225° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | Lock Nut | 0000000 | 00000 |
| 1 1/4" | 1" | 1 1/2" | 1/4" | 100 psi @ 70° F | 0° | 225° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | Lock Nut | 0000000 | 00000 |
| 1 1/2" | 1 5/16" | 1 3/4" | 7/16" | 50 psi @ 70° F | 0° | 225° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | Lock Nut | 0000000 | 00000 |
| 1 3/4" | 1 9/16" | 2" | 7/16" | 50 psi @ 70° F | 0° | 225° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | Lock Nut | 0000000 | 000000 |
| 2 1/4" | 1 15/16" | 2 1/2" | 7/16" | 50 psi @ 70° F | 0° | 225° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | Lock Nut | 0000000 | 000000 |
For Dark Liquid | ||||||||||||
Aluminum | ||||||||||||
| 3/4" | 1/2" | 7/8" | 1/4" | 50 psi @ 70° F | -40° | 180° | Water, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | Lock Nut | 0000000 | 00000 |
| 1" | 3/4" | 1 1/8" | 1/4" | 50 psi @ 70° F | -40° | 180° | Water, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | Lock Nut | 0000000 | 00000 |
| 1 1/4" | 1" | 1 3/8" | 1/4" | 25 psi @ 70° F | -40° | 180° | Water, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | Lock Nut | 0000000 | 00000 |
| 1 7/8" | 1 3/8" | 2" | 1/4" | 25 psi @ 70° F | -40° | 180° | Water, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | Lock Nut | 0000000 | 00000 |
| 2 3/8" | 1 7/8" | 2 5/8" | 1/4" | 10 psi @ 70° F | -40° | 180° | Water, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | Lock Nut | 0000000 | 00000 |
303 Stainless Steel | ||||||||||||
| 5/8" | 7/16" | 13/16" | 3/16" | 125 psi @ 70° F | 0° | 225° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | Lock Nut | 0000000 | 00000 |
| 3/4" | 9/16" | 15/16" | 3/16" | 125 psi @ 70° F | 0° | 225° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | Lock Nut | 0000000 | 00000 |
| 1" | 13/16" | 1 1/4" | 3/16" | 125 psi @ 70° F | 0° | 225° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | Lock Nut | 0000000 | 00000 |
| 1 1/4" | 1" | 1 1/2" | 1/4" | 100 psi @ 70° F | 0° | 225° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | Lock Nut | 0000000 | 00000 |
| 1 1/2" | 1 5/16" | 1 3/4" | 7/16" | 50 psi @ 70° F | 0° | 225° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | Lock Nut | 0000000 | 000000 |
| 1 3/4" | 1 9/16" | 2" | 7/16" | 50 psi @ 70° F | 0° | 225° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | Lock Nut | 0000000 | 000000 |
| 2 1/4" | 1 15/16" | 2 1/2" | 7/16" | 50 psi @ 70° F | 0° | 225° | Water, Diesel Fuel, Hydraulic Fluid (Petroleum Based) | Glass | Buna-N Rubber | Lock Nut | 0000000 | 000000 |
Press-Fit Through-Wall Sights
Press these sights into a hole in your tank wall; no additional mounting nuts are needed. They mount from the outside. The shatter-resistant plastic domed window allows you to view tank contents from multiple angles.
Temp. Range, °F | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| For Hole Dia. | OD | Window Dia. | For Max. Tank Wall Thick. | Max. Pressure | Min. | Max. | For Use With | Window Material | Seal Material | Each | |
Zinc-Plated Brass | |||||||||||
| 1 1/4" | 1 1/4" | 1" | 9/32" | Not Rated | 0° | 160° | Water, Hydraulic Fluid, Diesel Fuel | Plastic | Neoprene Rubber | 0000000 | 000000 |
| 1 1/2" | 1 1/2" | 1 1/4" | 9/32" | Not Rated | 0° | 160° | Water, Hydraulic Fluid, Diesel Fuel | Plastic | Neoprene Rubber | 0000000 | 00000 |
| 2" | 2" | 1 5/8" | 9/32" | Not Rated | 0° | 160° | Water, Hydraulic Fluid, Diesel Fuel | Plastic | Neoprene Rubber | 0000000 | 00000 |
High-Pressure Oil-Level Indicators
Monitor hydraulic fluid or oil level in pressurized applications, such as hydraulic systems where overflow is a concern. These indicators have a metal gauge shield that protects the glass window from impact. Clear liquids magnify a red line at the back of the window, so their levels are easier to see.
Through-wall indicators mount from the inside of your tank through unthreaded holes. Secure with nuts on the inside of your tank.
Screw-in/through-wall indicators give you the option to mount from the inside or outside of your tank. Use the mounting nuts on the inside of your tank to attach them through unthreaded holes or thread them into pipe or threaded holes on the tank’s outside.
Temp. Range, °F | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Connection Ctr.-to-Ctr. | Overall Ht. | Window Ht. | Body Wd. | For Max. Tank Wall Thick. | Max. Pressure | Min. | Max. | Fitting Material | Window Material | Features | Includes | Each | |
Through-Wall Mount—Aluminum | |||||||||||||
1/2"-20 UNF Male Thread—For 1/2" Hole Dia. (2 Holes) | |||||||||||||
| 3" | 4 5/8" | 1 1/2" | 7/8" | 3/4" | 290 psi @ 70° F | -40° | 250° | Aluminum | Glass | Red Line | Mounting Nuts | 0000000 | 000000 |
| 4" | 5 5/8" | 2 1/2" | 7/8" | 3/4" | 290 psi @ 70° F | -40° | 250° | Aluminum | Glass | Red Line | Mounting Nuts | 0000000 | 00000 |
| 5" | 6 5/8" | 3 1/2" | 7/8" | 3/4" | 290 psi @ 70° F | -40° | 250° | Aluminum | Glass | Red Line | Mounting Nuts | 0000000 | 00000 |
| 6" | 7 5/8" | 4 1/2" | 7/8" | 3/4" | 290 psi @ 70° F | -40° | 250° | Aluminum | Glass | Red Line | Mounting Nuts | 0000000 | 00000 |
| 7" | 8 5/8" | 5 1/2" | 7/8" | 3/4" | 290 psi @ 70° F | -40° | 250° | Aluminum | Glass | Red Line | Mounting Nuts | 0000000 | 00000 |
| 9" | 10 5/8" | 7 1/2" | 7/8" | 3/4" | 290 psi @ 70° F | -40° | 250° | Aluminum | Glass | Red Line | Mounting Nuts | 0000000 | 00000 |
| 10" | 11 5/8" | 8 1/2" | 7/8" | 3/4" | 275 psi @ 70° F | -40° | 250° | Aluminum | Glass | Red Line | Mounting Nuts | 0000000 | 00000 |
| 12" | 13 5/8" | 10 1/2" | 7/8" | 3/4" | 270 psi @ 70° F | -40° | 250° | Aluminum | Glass | Red Line | Mounting Nuts | 0000000 | 00000 |
Screw-In/Through-Wall Mount—Aluminum | |||||||||||||
1/2"-20 UNF Male Thread—For 1/2" Hole Dia. (2 Holes) | |||||||||||||
| 3" | 4 5/8" | 1 1/2" | 1 1/8" | 1/2" | 290 psi @ 70° F | -40° | 250° | Aluminum | Glass | Red Line | Mounting Nuts | 0000000 | 00000 |
| 4" | 5 5/8" | 2 1/2" | 1 1/8" | 1/2" | 290 psi @ 70° F | -40° | 250° | Aluminum | Glass | Red Line | Mounting Nuts | 0000000 | 00000 |
| 5" | 6 5/8" | 3 1/2" | 1 1/8" | 1/2" | 290 psi @ 70° F | -40° | 250° | Aluminum | Glass | Red Line | Mounting Nuts | 0000000 | 00000 |
| 6" | 7 5/8" | 4 1/2" | 1 1/8" | 1/2" | 290 psi @ 70° F | -40° | 250° | Aluminum | Glass | Red Line | Mounting Nuts | 0000000 | 00000 |
| 7" | 8 5/8" | 5 1/2" | 1 1/8" | 1/2" | 290 psi @ 70° F | -40° | 250° | Aluminum | Glass | Red Line | Mounting Nuts | 0000000 | 00000 |
| 9" | 10 5/8" | 7 1/2" | 1 1/8" | 1/2" | 290 psi @ 70° F | -40° | 250° | Aluminum | Glass | Red Line | Mounting Nuts | 0000000 | 00000 |
| 10" | 11 5/8" | 8 1/2" | 1 1/8" | 1/2" | 275 psi @ 70° F | -40° | 250° | Aluminum | Glass | Red Line | Mounting Nuts | 0000000 | 00000 |
| 12" | 13 5/8" | 10 1/2" | 1 1/8" | 1/2" | 270 psi @ 70° F | -40° | 250° | Aluminum | Glass | Red Line | Mounting Nuts | 0000000 | 00000 |
Chemical-Level Indicators
Check the level of liquids containing chemicals such as alcohol-based solvents, boric acid, and sodium bicarbonate. These indicators can be used in pressurized applications where overflow is a concern. All have an aluminum gauge shield that protects the glass window from impact. Clear liquids magnify a red line at the back of the window, so their levels are easier to see.
Through-wall indicators mount from the inside of your tank through unthreaded holes. Secure with nuts on the inside of your tank.
Screw-in/through-wall indicators give you the option to mount from the inside or outside of your tank. Use the mounting nuts on the inside of your tank to attach them through unthreaded holes or thread them into pipe or threaded holes on the tank’s outside.
Temp. Range, °F | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Connection Ctr.-to-Ctr. | Overall Ht. | Window Ht. | Body Wd. | For Max. Tank Wall Thick. | Max. Pressure | Min. | Max. | Fitting Material | Window Material | Features | Includes | Each | |
Through-Wall Mount—Aluminum | |||||||||||||
1/2"-20 UNF Male Thread—For 1/2" Hole Dia. (2 Holes) | |||||||||||||
| 5" | 6 5/8" | 3 1/2" | 7/8" | 3/4" | 290 psi @ 70° F | -15° | 400° | Aluminum | Glass | Red Line | Mounting Nuts | 0000000 | 000000 |
| 10" | 11 5/8" | 8 1/2" | 7/8" | 3/4" | 275 psi @ 70° F | -15° | 400° | Aluminum | Glass | Red Line | Mounting Nuts | 0000000 | 00000 |
| 12" | 13 5/8" | 10 1/2" | 7/8" | 3/4" | 270 psi @ 70° F | -15° | 400° | Aluminum | Glass | Red Line | Mounting Nuts | 0000000 | 00000 |
Screw-In/Through-Wall Mount—Aluminum | |||||||||||||
1/2"-20 UNF Male Thread—For 1/2" Hole Dia. (2 Holes) | |||||||||||||
| 3" | 4 5/8" | 1 1/2" | 1 1/8" | 1/2" | 290 psi @ 70° F | -15° | 400° | Aluminum | Glass | Red Line | Mounting Nuts | 0000000 | 00000 |
| 5" | 6 5/8" | 3 1/2" | 1 1/8" | 1/2" | 290 psi @ 70° F | -15° | 400° | Aluminum | Glass | Red Line | Mounting Nuts | 0000000 | 00000 |
| 6" | 7 5/8" | 4 1/2" | 1 1/8" | 1/2" | 290 psi @ 70° F | -15° | 400° | Aluminum | Glass | Red Line | Mounting Nuts | 0000000 | 00000 |
| 8" | 9 5/8" | 6 1/2" | 1 1/8" | 1/2" | 290 psi @ 70° F | -15° | 400° | Aluminum | Glass | Red Line | Mounting Nuts | 0000000 | 00000 |
| 10" | 11 5/8" | 8 1/2" | 1 1/8" | 1/2" | 275 psi @ 70° F | -15° | 400° | Aluminum | Glass | Red Line | Mounting Nuts | 0000000 | 00000 |
| 12" | 13 5/8" | 10 1/2" | 1 1/8" | 1/2" | 270 psi @ 70° F | -15° | 400° | Aluminum | Glass | Red Line | Mounting Nuts | 0000000 | 00000 |
High-Pressure Oil-Level and Temperature Indicators
Check both the temperature and the hydraulic fluid or oil level in a pressurized system. These indicators are often used in hydraulic systems where overflow is a concern. The aluminum gauge shield protects the glass window from impact.
Through-wall indicators mount from the inside of your tank through unthreaded holes. Secure with nuts on the inside of your tank.
Screw-in/through-wall indicators give you the option to mount from the inside or outside of your tank. Use the mounting nuts on the inside of your tank to attach them through unthreaded holes or thread them into pipe or threaded holes on the tank’s outside.
Indicators with a red line emphasize the level of clear liquids, so they’re easier to read.
Temp. Range, °F | Thermometer Temp. Range, °F | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Connection Ctr.-to-Ctr. | Overall Ht. | Window Ht. | Body Wd. | For Max. Tank Wall Thick. | Max. Pressure | Min. | Max. | Thermometer Type | Min. | Max. | Fitting Material | Window Material | Features | Includes | Each | |
Through-Wall Mount—Aluminum | ||||||||||||||||
1/2"-20 UNF Male Thread—For 1/2" Hole Dia. (2 Holes) | ||||||||||||||||
| 4" | 5 5/8" | 2 1/2" | 1 3/16" | 3/4" | 125 psi @ 70° F | -40° | 220° | Dial | 50° | 300° | Aluminum | Glass | Red Line | Mounting Nuts | 0000000 | 000000 |
| 5" | 6 5/8" | 3 1/2" | 1 3/16" | 3/4" | 125 psi @ 70° F | -40° | 220° | Dial | 50° | 300° | Aluminum | Glass | Red Line | Mounting Nuts | 0000000 | 00000 |
| 6" | 7 5/8" | 4 1/2" | 1 3/16" | 3/4" | 125 psi @ 70° F | -40° | 220° | Dial | 50° | 300° | Aluminum | Glass | Red Line | Mounting Nuts | 0000000 | 00000 |
| 7" | 8 5/8" | 5 1/2" | 1 3/16" | 3/4" | 125 psi @ 70° F | -40° | 220° | Dial | 50° | 300° | Aluminum | Glass | Red Line | Mounting Nuts | 0000000 | 00000 |
| 8" | 9 5/8" | 6 1/2" | 1 3/16" | 3/4" | 125 psi @ 70° F | -40° | 220° | Dial | 50° | 300° | Aluminum | Glass | Red Line | Mounting Nuts | 0000000 | 00000 |
| 12" | 13 5/8" | 10 1/2" | 1 3/16" | 3/4" | 125 psi @ 70° F | -40° | 220° | Dial | 50° | 300° | Aluminum | Glass | Red Line | Mounting Nuts | 0000000 | 00000 |
Screw-In/Through-Wall Mount—Aluminum | ||||||||||||||||
1/2"-20 UNF Male Thread—For 1/2" Hole Dia. (2 Holes) | ||||||||||||||||
| 3" | 4 5/8" | 1 3/8" | 1 3/16" | 1/2" | 20 psi @ 70° F | -40° | 220° | Scale | 60° | 180° | Aluminum | Glass | __ | Mounting Nuts | 0000000 | 00000 |
| 4" | 5 5/8" | 2 1/2" | 1 1/2" | 1/2" | 125 psi @ 70° F | -40° | 220° | Dial | 50° | 300° | Aluminum | Glass | Red Line | Mounting Nuts | 0000000 | 00000 |
| 5" | 6 5/8" | 3 3/8" | 1 3/16" | 1/2" | 20 psi @ 70° F | -40° | 220° | Scale | 0° | 220° | Aluminum | Glass | __ | Mounting Nuts | 0000000 | 00000 |
| 5" | 6 5/8" | 3 1/2" | 1 1/2" | 1/2" | 125 psi @ 70° F | -40° | 220° | Dial | 50° | 300° | Aluminum | Glass | Red Line | Mounting Nuts | 0000000 | 00000 |
| 6" | 7 5/8" | 4 1/2" | 1 1/2" | 1/2" | 125 psi @ 70° F | -40° | 220° | Dial | 50° | 300° | Aluminum | Glass | Red Line | Mounting Nuts | 0000000 | 00000 |
| 7" | 8 5/8" | 5 1/2" | 1 1/2" | 1/2" | 125 psi @ 70° F | -40° | 220° | Dial | 50° | 300° | Aluminum | Glass | Red Line | Mounting Nuts | 0000000 | 00000 |
| 8" | 9 5/8" | 6 1/2" | 1 1/2" | 1/2" | 125 psi @ 70° F | -40° | 220° | Dial | 50° | 300° | Aluminum | Glass | Red Line | Mounting Nuts | 0000000 | 00000 |
| 10" | 11 5/8" | 8 3/8" | 1 3/16" | 1/2" | 20 psi @ 70° F | -40° | 220° | Scale | 0° | 220° | Aluminum | Glass | __ | Mounting Nuts | 0000000 | 00000 |
| 12" | 13 5/8" | 10 1/2" | 1 1/2" | 1/2" | 125 psi @ 70° F | -40° | 220° | Dial | 50° | 300° | Aluminum | Glass | Red Line | Mounting Nuts | 0000000 | 00000 |
Shatter-Resistant Oil-Level and Temperature Indicators
The nylon body and window make these indicators shatter resistant. Use them to simultaneously monitor hydraulic fluid or oil level and temperature. All are UV resistant for use outdoors.
Indicators with a glass-filled nylon or aluminum guard, or no guard, mount from the inside of your tank through unthreaded holes. Glass-filled nylon guards are more impact resistant than aluminum guards.
Indicators with a steel guard have a lower profile and can withstand higher pressure than other indicators. Mount them from the outside of your tank through threaded holes.
Temp. Range, °F | Thermometer Temp. Range, °F | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Connection Ctr.-to-Ctr. | Overall Ht. | Window Ht. | Body Wd. | For Max. Tank Wall Thick. | Max. Pressure | Min. | Max. | Min. | Max. | Window Material | Includes | Each | |
Nylon Plastic | |||||||||||||
For 1/2" Hole Dia. (2 Holes) | |||||||||||||
| 3" | 4 1/4" | 2 1/16" | 13/16" | 1/2" | 10 psi @ 70° F | -65° | 210° | 30° | 210° | Nylon Plastic | Mounting Nuts | 0000000 | 000000 |
| 5" | 6 1/4" | 4 1/16" | 13/16" | 1/2" | 10 psi @ 70° F | -65° | 210° | 30° | 210° | Nylon Plastic | Mounting Nuts | 0000000 | 00000 |
| 10" | 11 1/4" | 9 1/16" | 13/16" | 1/2" | 10 psi @ 70° F | -65° | 210° | 30° | 210° | Nylon Plastic | Mounting Nuts | 0000000 | 00000 |
Nylon Plastic with Aluminum Guard | |||||||||||||
For 1/2" Hole Dia. (2 Holes) | |||||||||||||
| 3" | 4 3/4" | 2 1/16" | 15/16" | 1/2" | 10 psi @ 70° F | -65° | 210° | 30° | 210° | Nylon Plastic | Mounting Nuts | 0000000 | 00000 |
| 5" | 6 3/4" | 4 1/16" | 15/16" | 1/2" | 10 psi @ 70° F | -65° | 210° | 30° | 210° | Nylon Plastic | Mounting Nuts | 0000000 | 00000 |
| 10" | 11 3/4" | 9 1/16" | 15/16" | 1/2" | 10 psi @ 70° F | -65° | 210° | 30° | 210° | Nylon Plastic | Mounting Nuts | 0000000 | 00000 |
Nylon Plastic with Glass-Filled Nylon Plastic Guard | |||||||||||||
For 1/2" Hole Dia. (2 Holes) | |||||||||||||
| 5" | 6 3/4" | 4 1/16" | 15/16" | 1/2" | 10 psi @ 70° F | -65° | 210° | 30° | 210° | Nylon Plastic | Mounting Nuts | 0000000 | 00000 |
Nylon Plastic with Steel Guard | |||||||||||||
For 1/2" Hole Dia. (2 Holes) | |||||||||||||
| 5" | 6 3/8" | 3 7/8" | 13/16" | 1/2" | 50 psi @ 70° F | -40° | 210° | 0° | 220° | Nylon Plastic | __ | 0000000 | 00000 |