1 Off (Normally Open) or 1 On (Normally Closed) Switches | McMaster-Carr

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Cross Roller Plunger

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6V AC to 400V AC

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1,126 Products

Electrical

Manual Switches

Manual Switches

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

Snap-Acting Switches

Snap-Acting Switches

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

Limit Switches

Turn equipment on or off when objects touch the actuator; often used for conveyors and bin filling

Fusible Link Switches

Fusible Link Switches

Use as a safety switch to shut off hydraulic equipment and other machinery when the link melts

Vibration Switches

Vibration Switches

Monitor vibration in machinery and shut it down or sound an alarm if levels rise

Magnetic Switches

Magnetic Switches

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

Relays

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

Timer Switches

Automatically turn electrical equipment on or off after a set interval

Sensor Switches

Sensor Switches

Detect moving objects from a distance, triggering a circuit to open or close

Motor Voltage Monitors

Motor Voltage Monitors

Protect electric motors by cutting power when faults occur

Timer Relays

Turn machinery on or off after receiving an electrical signal that starts the timer

Sensor Switch Transmitters

Sensor Switch Transmitters

Monitor objects, switch equipment on and off, and send data to control systems with a single device

Potentiometers

Control speed, volume, and light intensity by varying electrical flow; also known as rheostats

Fluid Handling

Humidity Controllers

Humidity Controllers

Monitor humidity and control it by automatically turning equipment on and off

Temperature Switches

Temperature Switches

Turn heating equipment on or off at a specified temperature

Humidistats

Control the humidity in an enclosure or space

Temperature Controllers

Temperature Controllers

Precisely regulate process temperatures; more accurate than temperature switches

Noncontact Temperature Sensors

Noncontact Temperature Sensors

Monitor the temperature of hazardous, sensitive, and hard-to-reach materials without touching them

Differential Pressure Switches

Differential Pressure Switches

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

Vacuum Switches

Vacuum Switches

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

Pressure Switches

Pressure Switches

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

Float Switches

Start process equipment such as pumps and motors when the liquid in your tank reaches the float

Float Switch Relays

Float Switch Relays

Amplify current to actuate equipment that has a higher current rating than your float switch

Flow Switches

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

Level Sensor Switches

Level Sensor Switches

Activate equipment by detecting the liquid level in a tank

Paddle Level Switches

Paddle Level Switches

Actuate when the paddle stops rotating to indicate the level of dry material

Flow Transmitters

Flow Transmitters

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

Pressure and Vacuum Transmitters

Pressure and Vacuum Transmitters

Convert pressure and vacuum measurements into a signal sent to remote displays and controllers

Heating, Ventilation, and Air Conditioning

Thermostats

Connect to heaters, fans, and air conditioners to control the temperature

Lighting

Light Switches

Manually turn lights on and off

The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)