Pressure Switches | McMaster-Carr

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System of Measurement

Pressure Set Point

0 in. H₂O to 0.5 in. H₂O

0 in. H₂O to 1 in. H₂O

0 in. H₂O to 2 in. H₂O

0 in. H₂O to 5 in. H₂O

0 in. H₂O to 10 in. H₂O

For Use With

Hydraulic Fluid (Petroleum Based)

Petroleum-Based Hydraulic Oil

Pipe Size

Maximum Continuous Pressure

Thread Type

UN/UNF (SAE Straight)

Operates On

Differential Pressure

Wire Connection

Maximum Switching Current @ Voltage

Set Point Adjustability

Adjustable

Fixed

Switch Starting Position

Measurement Unit

Kilograms per Square Centimeter

Kilopascals

Megapascals

Millibars

Millimeters of Mercury

Pounds per Square Inch

Fitting Connection

Environment

High-Pressure Washdown

Maximum Short-Term Pressure

Connection Material

Approximate Difference Between Set Point and Reset Point

Connects To

Enclosure Rating

Gender

Electrical Phase

Housing Material

RoHS

Compliant with Exemptions

Not Compliant

Export Control Classification Number (ECCN)

EAR99

DFARS Specialty Metals

REACH

599 Products

Pressure Switches

Compact Pressure Switches

One-third thinner than traditional pressure switches to fit into tight, cramped spaces

58 products

Pressure Switches

The traditional choice to power equipment and activate controls when they reach a set pressure

46 products

Fixed Setpoint Pressure Switches

Prevent changes to set pressure—each arrives ready to use at your preferred setpoint

60 products

Pressure Switches for Air Compressors

Maintain the air pressure needed for air-powered devices

18 products

Pressure Switches for Water Pumps

Activate or deactivate your electric water pump based on water pressure

8 products

Economy Pressure Switches

Best for applications that need reliable switching but don’t require high accuracy

8 products

Dual-Setpoint Electronic Pressure Switches with Digital Display

Send signals to PLCs to activate controls at either pressure you set on the display

8 products

Electronic Pressure Switches for Compressed Air

Send signals to PLCs to activate controls in most air systems

8 products

Electronic Pressure Switches

Send signals to PLCs to activate controls

14 products

Hazardous Location Pressure Switches

Built with an explosion-proof enclosure for use in areas with explosive liquids, dust, and gas

11 products

Adjustable-Reset Pressure Switches

Control the pressure range between switch activation and deactivation by choosing when they reset

13 products

Adjustable-Reset Pressure Switches with Digital Display

Start equipment or trigger controls based on pressure changes while monitoring the display

5 products

Multiport Pressure Switches for Air Compressors

Maintain compressor pressure and connect up to three air-powered tools using the multiple ports

5 products

Manual-Reset Pressure Switches

Require a manual reset each time they hit the set pressure to inspect equipment before it restarts

9 products

Dual-Setpoint Pressure Switches

Trigger two different processes, each with their own set pressure

8 products

Dual-Setpoint Electronic Pressure Switches for Compressed Air

Send signals to PLCs to activate controls in most air systems at either set pressure

4 products

Dual-Setpoint Electronic Pressure Switches

Send signals to PLCs to activate controls at either set pressure

5 products

Pressure Switches for Oxygen

Cleaned and bagged to meet strict standards for oxygen service lines

7 products

Pressure Switches for Sump Pumps

Activate as pressure increases from rising water—no floats to catch on sump pit walls

2 products

Sanitary Pressure Switches

3-A certified to trigger controls in food, pharmaceutical, and biotech lines

8 products

Sanitary Pressure and Vacuum Switches

Trigger controls at a set pressure or vacuum, and 3-A certified for food, pharma, and biotech lines

2 products

Pressure Switches for SMC Modular Filter/Regulator/Lubricators (FRLs)

Connect inline to monitor air pressure and send signals to equipment

8 products

Other Products

Differential Pressure Switches

Activate controls and alarms when the pressure difference between process lines exceeds a setpoint

53 products

Pressure and Vacuum Switches

Activate controls, set off alarms, and power equipment when a set pressure or vacuum is reached

6 products

Vacuum Switches

Activate controls, set off alarms, and power equipment when a set vacuum is reached

27 products

Relays

Electrically open and close circuits to control power to lights, motors, and other equipment

1 product

Flow Switches

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

177 products

Differential Pressure Transmitters

Relay pressure changes in heating, cooling, and pumping systems to controllers and remote displays

3 products

Manual Switches

Everything from toggle, push-button, and rocker switches to foot switches

9 products

HVAC Switches

Control and monitor airflow in HVAC systems automatically

3 products

Switch Padding

Trigger an emergency stop when robot arms contact a worker or object

4 products