Sight Gauges | McMaster-Carr

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1,234 Products

Liquid-Level Gauges

Liquid-Level Indicators

High-Pressure Oil-Level Indicators

Monitor fluid levels in pressurized applications, such as hydraulic systems

91 products

Shatter-Resistant Oil-Level and Temperature Indicators

Monitor fluid level and temperature through a durable nylon window

8 products

Oil-Level Indicators

Monitor fluid levels in gear boxes, crank cases, and other reservoirs

122 products

Build-Your-Own Liquid-Level Indicators with Shut-Off Valve

Build your own level indicator with valves, gauges, and guard rods

120 products

Flexible Easy-View Liquid-Level Indicators

Bend around the contours of your hydraulic fluid, oil, or water tank

14 products

Chemical-Level Indicators

Check the level of liquids containing chemicals such as boric acid and sodium bicarbonate

14 products

Liquid-Level Indicators with Shut-Off Valve

Stop the flow so you can clean and replace gauge glass without removing the indicator

16 products

Easy-View High-Pressure Oil-Level Indicators

The nylon body and window resist shattering and allow you to check levels from any angle

7 products

High-Pressure Oil-Level and Temperature Indicators

Check the temperature and the fluid level in a pressurized system

33 products

Easy-View Oil-Level Indicators

Made with clear plastic so you can check fluid levels from any angle

15 products

Heavy Duty Liquid-Level Indicators

Withstand vibration, high pressures, and high temperatures

19 products

Oil-Level and Temperature Indicators

Monitor the fluid level and temperature in gear boxes, crank cases, and other reservoirs

14 products

Pop-Up Full-Tank Liquid-Level Indicators

Pop up when your tank is almost full to avoid overfilling

16 products

Liquid-Level Gauges

Vertical-Mount Liquid-Level Gauges for Tanks

Install through the top of tanks containing water, hydraulic fluid, and diesel

139 products

Vertical-Mount Fuel-Level Gauges for Tanks

Install through the top of your tank to monitor diesel, fuel oil, or gasoline level

37 products

Chemical-Resistant Vertical-Mount Liquid-Level Gauges for Tanks

Stainless steel float and float rod resist corroding from chemicals

23 products

Precision Liquid-Level Gauges for Tanks

Measure levels using inches or centimeters instead of full or empty

7 products

Horizontal-Mount Fuel-Level Gauges for Tanks

Mount on the flat end of a horizontal, cylindrical tank to monitor fuel levels

2 products

Liquid-Level Gauges for Drums

Measure water, hydraulic fluid, or diesel fuel level in your drum

20 products

Propane Tank Refill Indicator Gauges

Know at a glance if your propane gas supply is running low

1 product

Other Products

Sights

Observe and monitor the contents of pipes, tanks, and other containers

243 products

Gauge Glass

Create or repair liquid-level gauges to monitor fluid levels in containers

138 products

Flow Sights

Visually confirm flow and inspect liquid color and clarity

154 products

Plastic

A lightweight alternative to metal and glass

35 products

Gauge Glass Gaskets

Seal the glass on level indicators to monitor liquids without leaks

14 products

Liquid-Level Transmitters

Send liquid-level data to logging and monitoring equipment

29 products

Hose and Hose Fittings

Flexible and stronger than tubing; often used to convey liquids and gases under pressure

2 products

Flow Transmitters

Send flow rate measurements to PLCs, data loggers, and remote displays

29 products