Tube Monitors | McMaster-Carr

Made of FDA-listed materials, these sights can be used with food and beverage. They have sanitary quick-clamp connections for easy disassembly and cleaning.

Flow Sights for High Vacuum

Peer through the glass on these flow sights to see what’s happening in your high-vacuum line.

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

Barbed fittings slide into soft plastic and rubber tubing.

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.

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.

Sanitary Level Indicators

Mount these indicators on the outside of tanks in food, pharmaceutical, and other sanitary environments to monitor their liquid levels.

Pressure and Vacuum Gauges

Vibration- and Corrosion-Resistant
Pressure Gauges

The case material and connection threads are stainless steel for protection in corrosive environments, plus the dial is glycerin-filled to reduce needle flutter in high-vibration applications.

Low-Pressure Differential
Gauges with Inclined Scale

Easier to read than U-tube gauges, these use an inclined scale to measure pressure or velocity changes in air applications. They are also known as manometers.

Low-Pressure Differential
Gauges with Digital Display

Gauges have a digital display for easy reading of measurements.

Low-Pressure Differential
Gauges with U-Tube

Also known as manometers, these gauges come with indicating liquid that moves up and down two columns—the difference in height between them is your pressure.

Differential Pressure and Vacuum
Gauges with Digital Display

Gauges have a digital display for easy reading of measurements.

Pressure and Vacuum Transmitters

Sanitary Easy-Setup Pressure
and Vacuum Transmitters

Designed for sanitary environments, these transmitters automatically compensate for error in vacuum and pressure measurements caused by vibration and temperature fluctuations, so you don’t need to program corrections into your receiving device.

Low-Pressure Differential
Pressure Transmitters

Often used in HVAC systems and clean room airflow monitoring applications, these transmitters measure the difference in pressure between two low-pressure process lines.

Sanitary Pressure Transmitters

For use in sanitary applications such as food processing, these transmitters are 3-A certified.

Sanitary Easy-Setup
Vacuum Transmitters

Monitor and control equipment in food-processing and pharmaceutical plants—these transmitters convert vacuum into electrical signals for receiving devices and have a 3-A certified sanitary design. They automatically compensate for vibration and temperature changes, saving you the effort of programming manual corrections.

Sanitary Easy-Setup
Pressure Transmitters

Used in food-processing and pharmaceutical plants to automatically compensate for temperature changes and errors caused by vibration, these transmitters have a sanitary design certified by 3-A.

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Flow and Level Monitoring and Control

Flowmeters for Oxygen

Flowmeter/Totalizers for Chemicals

Flow Transmitters for Air

Flow Sights for Food and Beverage

Flow Sights for High Vacuum

Flow Sights with Barbed Fittingsfor Water, Oil, Air, and Inert Gas

High-Vacuum Sights forQuick-Clamp Fittings

High-Vacuum Flanged Sights

Sanitary Level Indicators

Pressure and Vacuum Gauges

Vibration- and Corrosion-ResistantPressure Gauges

Low-Pressure DifferentialGauges with Inclined Scale

Low-Pressure DifferentialGauges with Digital Display

Low-Pressure DifferentialGauges with U-Tube

Differential Pressure and VacuumGauges with Digital Display