Photocells | McMaster-Carr

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348 Products

Choosing a Proximity Switch

Light-Sensing Light Controls

Wire these controls to light fixtures.

Light-Sensing Controls for Light Bulbs

Screw these controls into a light bulb socket.

Proximity Switches

Photoelectric Switches

Detect the presence or absence of an object moving at high speeds with a light beam. These switches have a longer sensing distance than proximity and ultrasonic switches.

Photoelectric Switches with Relay Output

A built-in relay produces AC voltage output. These switches are often used with older programmable logic controllers (PLCs).

Time-Delay Photoelectric Switches with Relay Output

Set these switches to delay activation by up to five seconds after detecting an object.

Space-Saving Photoelectric Switches

With a narrow, flat body, these switches fit in tight spaces.

Reflectors for Photoelectric Switches

Easy-Install Photoelectric Switches

These switches have a receiver built into the housing, eliminating the need to align components and measure sensing distance during installation.

Harsh Environment Photoelectric Switches

Rated IP69K, these switches can withstand high-pressure, high-temperature washdowns and temporary submersion.

Precision Photoelectric Switches

For optimal performance in tight spaces, these switches have a smaller beam and can detect smaller objects than standard photoelectric switches.

Fiber-Optic Photoelectric Switches

The highly flexible fiber-optic cable and small sensing end help you position these switches in hard to reach areas.

Time-Delay Fiber-Optic Photoelectric Switches

Set these switches to delay activation by up to fifteen seconds after detecting an object.

Hazardous Location Photoelectric Switches

Safely detect the presence or absence of an object moving at high speeds with a light beam. These switches produce a low-current, low-voltage NAMUR signal, so they won’t create sparks or ignite. ATEX and IECEx certified, they protect against explosion in environments containing flammable gases and combustible dust.

Long Distance Light Beam Safety Barrier Switches

Transmit a beam of light up to 225 ft. from the transmitter to the receiver.

Wide-Angle Safety Barrier Switches

Scanning 275° side-to-side for people and objects, these switches (known as safety laser scanners) cover large areas and send signals to machinery to prevent accidents.