Process Controllers | McMaster-Carr

Filter by

System of Measurement

Input Voltage

Electrical Phase

Switching Current

Number of Circuits Controlled

Switching Voltage

Horsepower @ Switching Voltage

Mounting Location

Switch Designation

Number of Terminals

For Use With

Pipe Size

Wire Connection

Switch Starting Position

Certification

REACH Compliance

Enclosure Rating

RoHS Compliance

Width

Height

Overload Current

DFARS Compliance

Voltage

How can we improve?

2,652 Products

Fluid Handling

Temperature Controllers

Temperature Controllers

Precisely regulate process temperatures; more accurate than temperature switches

Temperature Switches

Temperature Switches

Turn heating equipment on or off at a specified temperature

Water Heater Thermostats

Water Heater Thermostats

Replace the thermostat on your water heater

Pressure Switches

Pressure Switches

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

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 and Vacuum Switches

Pressure and Vacuum Switches

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

Flow Switches

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

Electrical

Programmable Logic Controllers

Programmable Logic Controllers

Program complex automation jobs by combining the functionality of a relay, timer relay, and switch

Programmable Logic Controller Input and Output Modules

Programmable Logic Controller Input and Output Modules

Connect switches, transmitters, and actuators to your PLC for complex automation jobs

Programmable Logic Controller Expansion Modules

Programmable Logic Controller Expansion Modules

Increase the number of inputs and outputs for your PLC

Programmable Logic Controller Communication Modules

Programmable Logic Controller Communication Modules

Connect and communicate simultaneously with multiple automation devices

Edge Controllers

Edge Controllers

Use in automated systems to monitor sensors, control actuators, and support wireless connections

Human-Machine Interfaces

Human-Machine Interfaces

Control PLCs, inverters, and other automated equipment; also known as HMIs

Relays

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

Potentiometers

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

Timer Relays

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

Current Relays

Prevent AC current overload in equipment such as motors and heaters

Motor Starters

Turn motors on and off and protect them from current overloads

Disconnect Switches

Disconnect Switches

Make sure equipment stays turned off during inspection and maintenance

Motor Switches

Turn motors, lighting, and electric heat circuits on and off

Motor Controllers

Motor Controllers

Store and run programs and send signals to a driver to control the motion of a stepper motor

Motor Drives

Receive signals from a motor controller and deliver them to your stepper motor

Transfer Switches

Transfer Switches

Switch to backup power during an outage

Electrical Connectors and Cords

Electrical Connectors and Cords

Supply power to equipment by combining plugs, sockets, receptacles, and cords

Heating, Ventilation, and Air Conditioning

HVAC Switches

Control and monitor airflow in HVAC systems automatically

Thermostats

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

Measuring and Inspecting

Inertial Measurement Units

Inertial Measurement Units

Mount to robot arms, cranes, and vehicles to accurately track their movements

Power Transmission

Stepper Motors

Motor shaft turns in small, equal increments for precise positioning

Electric Actuators

Electric Actuators

Push and pull loads with more precise positioning than air and hydraulic cylinders

Facility and Grounds Maintenance

Drinking Fountain Replacement Parts

Drinking Fountain Replacement Parts

Replace nozzles, regulators, filters, handles, and other original manufacturer parts

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