Roller Plungers | McMaster-Carr

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High-Pressure Washdown

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EAR99

DFARS Specialty Metals

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782 Products

Limit Switches

A large actuator with rapid-closing action opens and closes a circuit when objects contact it

29 products

Build-Your-Own Limit Switches

Combine an actuator and a switch for the exact limit switch you need

28 products

Low-Profile Limit Switches

Slim enough to stack multiple switches together or fit into tight spaces

21 products

Compact Safety Limit Switches

Shorter and thinner than other safety limit switches to fit into tight spaces

13 products

Safety Limit Switches

Protect machinery and personnel by opening the circuit even if a spring fails or contacts stick

10 products

Sealed Low-Profile Limit Switches

Sealed to keep out contaminants and slim enough to stack together or fit into tight spaces

11 products

Wireless Self-Powered Limit Switches

They power themselves, so you can install them where changing a battery is difficult

9 products

Washdown Limit Switches

NEMA 3S and IP69K to handle washdowns and high pressures and temperatures

13 products

Panel-Mount Light-Touch Limit Switches

Our most sensitive limit switches actuate with the slightest push for high accuracy

2 products

Heavy Duty Limit Switches

Rugged enough for mining operations, but they require high actuation force, such as heavy rocks

5 products

Panel-Mount Sealed Wet-Location Limit Switches

A seal prevents the switch from jamming, even when exposed to oil, sand, mud, or ice

4 products

Rotary Limit Switches

Start or stop equipment after a set number of rotations to avoid over-rotation

4 products

Manual-Reset Safety Limit Switches

Manually reset after actuation to prevent equipment from automatically restarting

3 products

Hazardous Location Limit Switches

The housing is sealed, so they won't ignite flammable gas or dust when they open or close a circuit

2 products

Panel-Mount Low-Profile Limit Switches

Install in panel cutouts in tight spaces or when you need to stack multiple switches together

3 products

Other Products

Snap-Acting Switches

Open and close circuits quickly to minimize arcing and sticking; often used as door-open indicators

206 products

Proximity Sensors

Detect the presence or position of objects from a short sensing distance

347 products

Switch Mounts

Mount switches to panel cutouts, tank walls, or conveyors

5 products

Ultrasonic Sensors

Measure the distance to objects and the level of liquids and materials

20 products

Tilt Switches

Trip circuits when tilted; use as position indicators, pump level controls, and limit switches

8 products

Speed-Monitoring Switches

Avoid downtime and machinery damage by detecting slowdowns in drive trains and conveyors

3 products

Magnetic Switches

Actuate when a magnet comes within sensing distance; often used to detect when doors or windows open

2 products

Photoelectric Sensors

Detect objects from longer distances than proximity and ultrasonic sensors

1 product