Flow Indicators | McMaster-Carr

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1,525 Products

Flow Sights

Flow Sights with Indicator for Water and Oil

The indicator makes it easy to visually confirm flow from a distance

45 products

Flow Sights with Barbed Fittings for Water, Oil, Air, and Inert Gas

Barbed fittings slide into soft plastic and rubber tubing

3 products

Compact Flow Sights with Indicator for Water and Oil

The low-profile body fits in areas with limited clearance
The indicator makes it easy to visually confirm flow from a distance

16 products

Panel-Mount Flow Sights for Water, Oil, and Inert Gas

Install in instrument panels with the included mounting ring

7 products

High-Temperature Flow Sights for Water and Oil

Withstand twice the temperature of standard sights, up to 400° F

7 products

Compact Flow Sights for Water and Oil

The low-profile body fits in areas with limited clearance

16 products

Flow Sights for Water and Oil

Visually confirm flow and inspect liquid color and clarity

13 products

High-Pressure Flow Sights for Water and Oil

Withstand more than double the pressure of standard sights, up to 400 psi

12 products

Flow Sights for Chemicals

The PVC body withstands corrosive chemical solutions

5 products

Full-View Flow Sights with Indicator for Water and Oil

A large tubular window provides an unobstructed view from multiple angles
The indicator makes it easy to visually confirm flow from a distance

6 products

Quick-Clean Flow Sights for Water

Twist the tubular window to clear buildup with the internal wipers

4 products

Compact Flow Sights for Chemicals

About half the height of standard flow sights for chemicals
The stainless steel body withstands corrosive chemical solutions

8 products

Full-View Flow Sights for Water and Oil

A large tubular window provides an unobstructed view from multiple angles

7 products

Food and Beverage Flow Sights

Made of FDA-listed materials for use with food and beverage

5 products

Other Products

Flowmeters

Measure the flow rate of liquid or gas through your system

1,087 products

Flow Transmitters

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

84 products

Flow Switches

Turn equipment on or off when flow rate reaches a set point

177 products

Calibration Columns

Calibrate the flow rate of metering pumps

14 products

Grease Dispenser Monitors

Extend the life of bearings by taking the guesswork out of how much to lubricate them

6 products

Hose and Hose Fittings

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

2 products