Controllers
Centro carries a complete selection of controllers available to purchase online. This includes Process Meters, Panel Meters, and PID controllers. Process Meters measure and control process variables such as tempera...
Categories in Controllers - Advanced Automation Control Systems (2)
Panel Meters and Displays
Panel meters and displays are instruments used to monitor and display various electrical or process parameters. They provide real-time measurement and visualization of parameters such as voltage, current, temperature, pressure, or flow rate. Panel meters and displays are available in different types, including analog meters, digital displays, or graphical interfaces, offering versatile options for different applications. They find extensive use in industrial control panels, machinery, electrical distribution systems, and monitoring stations, providing operators with crucial information for process control and troubleshooting.
PID
PID, which stands for Proportional-Integral-Derivative, refers to a control algorithm widely used in industrial automation and process control systems. PID controllers continuously analyze and adjust a system's control output based on feedback from sensors. They aim to minimize the error between the desired setpoint and the measured process variable by dynamically adjusting proportional, integral, and derivative terms. PID controllers are essential for maintaining stability, accuracy, and responsiveness in applications such as temperature control, pressure regulation, or speed control.
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The Dwyer - MNS2-9-IN-PS-300 is a Wireless Pressure Meter featuring 5 V, Absolute Pressure, 3 ' Cable, 1 Channel, Long Range, North America (900 MHz), and IP65 NEMA 4X. Sold individually.
$716.15
Should ship between 13 Nov and 20 Nov
Subject to factory lead times
The Dwyer - MNS2-9-IN-TS-HT-L03 is a Wireless Duct Temperature Sensor featuring High Temperature, RTD, 3 ' Lead, 1 Channel, Long Range, North America (900 MHz), and IP65 NEMA 4X. Sold individually.
$292.03
Should ship between 13 Nov and 20 Nov
Subject to factory lead times
The Dwyer - MNS2-9-IN-TS-HT-L25 is a Wireless Duct Temperature Sensor featuring High Temperature, RTD, 25 ' Lead, 1 Channel, Long Range, North America (900 MHz), and IP65 NEMA 4X. Sold individually.
$326.00
Should ship between 13 Nov and 20 Nov
Subject to factory lead times
The Dwyer - MNS2-9-IN-TS-ST-L25 is a Wireless Duct Temperature Sensor featuring Thermistor, 25 ' Lead, 1 Channel, Long Range, North America (900 MHz), and IP65 NEMA 4X. Sold individually.
$303.97
Should ship between 13 Nov and 20 Nov
Subject to factory lead times
The Dwyer - MNS2-9-IN-VM-010 is a Wireless Process Voltage Meter featuring Voltage Bridge, 1' Stripped Leads, 1 Channel, Long Range, North America (900 MHz), and IP65 NEMA 4X. Sold individually.
$305.55
Should ship between 13 Nov and 20 Nov
Subject to factory lead times
The Dwyer - MNS2-9-IN-VM-200 is a Wireless Voltage Meter featuring Voltage Bridge, 1' Stripped Leads, 1 Channel, Long Range, North America (900 MHz), and IP65 NEMA 4X. Sold individually.
$305.55
Should ship between 13 Nov and 20 Nov
Subject to factory lead times
The Dwyer - MNS2-9-IN-WS-WR is a Wireless Water Detection Sensor featuring Detection Rope, 10 ' Sensing Rope, 1 Channel, Long Range, North America (900 MHz), and IP65 NEMA 4X. Sold individually.
$438.04
Should ship between 13 Nov and 20 Nov
Subject to factory lead times
The Dwyer - MNS2-9-W2-AC-VM is a Wireless Accelerometer-Vibration Meter featuring Speed, Frequency, G-force, Integrated, 3 Channels, Long Range, North America (900 MHz), and IP65 NEMA 4X. Sold individually.
$143.18
Should ship between 13 Nov and 20 Nov
Subject to factory lead times
The Dwyer - MNS2-9-W2-CM-020 is a Wireless AC Current Meter featuring Clamp on Transformer, 0 A to 20 A, 3 ' Cable, 1 Channel, Long Range, North America (900 MHz), and General Purpose. Sold individually.
$234.51
Should ship between 13 Nov and 20 Nov
Subject to factory lead times
The Dwyer - MNS2-9-W2-CM-150 is a Wireless AC Current Meter featuring Clamp on Transformer, 0 A to 150 A, 3 ' Cable, 1 Channel, Long Range, North America (900 MHz), and General Purpose. Sold individually.
$268.60
Should ship between 13 Nov and 20 Nov
Subject to factory lead times
The Dwyer - MNS2-9-W2-HU-RH-L25 is a Wireless Humidity Sensor featuring Digital, 25 ' Lead, 1 Channel, Long Range, North America (900 MHz), and General Purpose. Sold individually.
$269.12
Should ship between 13 Nov and 20 Nov
Subject to factory lead times
The Dwyer - MNS2-9-W2-OC-ST is a Wireless Open/Closed Sensor featuring Magnet, Integrated, 1 Channel, Long Range, North America (900 MHz), and General Purpose. Sold individually.
$163.45
Should ship between 13 Nov and 20 Nov
Subject to factory lead times
The Dwyer - MNS2-9-W2-PS-050 is a Wireless Low Pressure Meter featuring 5 V, Absolute Pressure, 3 ' Cable, 1 Channel, Long Range, North America (900 MHz), and General Purpose. Sold individually.
$632.73
Should ship between 13 Nov and 20 Nov
Subject to factory lead times
The Dwyer - MNS2-9-W2-PS-300 is a Wireless Pressure Meter featuring 5 V, Absolute Pressure, 3 ' Cable, 1 Channel, Long Range, North America (900 MHz), and General Purpose. Sold individually.
$632.73
Should ship between 13 Nov and 20 Nov
Subject to factory lead times
The Dwyer - MWTC-D-T-915 is a Wireless Thermocouple Connector & Data Logger featuring Miniature Portable, T-Type, Universal TC, 1 Channel, Short Range, North America (915 MHZ), and Handheld. Part of the MWTC Series. Sold individually.
$364.99$395.88
Should ship between 06 Nov and 13 Nov
Subject to factory lead times
The Dwyer - MXGTW1 is a Gateway-Aggregator featuring 10/100 Ethernet, Wi-Fi, and 100 Devices. Sold individually.
$557.40
Should ship between 27 Nov and 04 Dec
Subject to factory lead times
The Dwyer - OM-CP-RFC1000-IP69K is a Wireless Receiver for OM-CP-RF & Thermalert Datalogger featuring Transceiver, USB, 64 Devices, Global (2.4 GHz), and NEMA Enclosure. Part of the OM-CP Series. Sold individually.
$520.34
Should ship between 06 Nov and 13 Nov
Subject to factory lead times
The Dwyer - OM-SGD-24-M-IP is a Process Digital Panel Meter featuring Color TFT 2.4 " Waterproof Smart Graphics Display, 2.91 " x 1.81 " Size, DC Supply, 2 Analog Voltage I/P, and 2 Open-Collector O/P. Part of the OM-SGD Series. Sold individually.
$381.54
Should ship between 20 Nov and 04 Dec
Subject to factory lead times
The Dwyer - OMDC-130HC100 is a Reversing DC Motor Speed Control featuring 1 HP, 120 Vac, 10 A, 0 Vdc to 90 Vdc O/P, and Chassis Mount. Part of the 130 Series. Sold individually.
$729.29
Should ship between 13 Nov and 20 Nov
Subject to factory lead times
The Dwyer - OME-ET-7026 is an Ethernet Remote I/O Module with Built-In Web Server featuring Process Current, Voltage I/P, 10/s Sample Rate, 2 Inputs, 2 Outputs, ± 10 V, 0 mA to 20 mA, Ethernet, and DC Power. It is rated for a temperature range of 16 °C. Part of the OME-ET-7000 Series. Sold individually.
$1,036.34
Should ship between 13 Nov and 20 Nov
Subject to factory lead times
The Dwyer - OMHT17-278-D-WAA is a Bipolar High Torque Stepper Motor featuring 2-Phase, NEMA 17, Encoder, and 113 oz-in Holding Torque. Part of the OMHT Series. Sold individually.
$411.25
Should ship between 06 Nov and 13 Nov
Subject to factory lead times
The Dwyer - OMHT23-603-D-ZAA is a Bipolar High Torque Stepper Motor featuring 2-Phase, NEMA 23, Encoder, and 354 oz-in Holding Torque. Part of the OMHT Series. Sold individually.
$559.88
Should ship between 13 Nov and 20 Nov
Subject to factory lead times
The Dwyer - OMHT34-490 is a Bipolar High Torque Stepper Motor featuring 2-Phase, NEMA 34, Single Shaft, 1845 oz-in Holding Torque, and 3 m Shielded Cable. Part of the OMHT Series. Sold individually.
$1,110.09
Should ship between 13 Nov and 20 Nov
Subject to factory lead times
The Dwyer - OMHT34-504-D is a Bipolar High Torque Stepper Motor featuring 2-Phase, NEMA 34, Double Shaft, and 396 oz-in Holding Torque. Part of the OMHT Series. Sold individually.
$227.84
Should ship between 13 Nov and 20 Nov
Subject to factory lead times
The Dwyer - MNS2-9-IN-PS-300 is a Wireless Pressure Meter featuring 5 V, Absolute Pressure, 3 ' Cable, 1 Channel, Long Range, North America (900 MHz), and IP65 NEMA 4X. Sold individually.
$716.15
Should ship between 13 Nov and 20 Nov
Subject to factory lead times
The Dwyer - MNS2-9-IN-TS-HT-L03 is a Wireless Duct Temperature Sensor featuring High Temperature, RTD, 3 ' Lead, 1 Channel, Long Range, North America (900 MHz), and IP65 NEMA 4X. Sold individually.
$292.03
Should ship between 13 Nov and 20 Nov
Subject to factory lead times
The Dwyer - MNS2-9-IN-TS-HT-L25 is a Wireless Duct Temperature Sensor featuring High Temperature, RTD, 25 ' Lead, 1 Channel, Long Range, North America (900 MHz), and IP65 NEMA 4X. Sold individually.
$326.00
Should ship between 13 Nov and 20 Nov
Subject to factory lead times
The Dwyer - MNS2-9-IN-TS-ST-L25 is a Wireless Duct Temperature Sensor featuring Thermistor, 25 ' Lead, 1 Channel, Long Range, North America (900 MHz), and IP65 NEMA 4X. Sold individually.
$303.97
Should ship between 13 Nov and 20 Nov
Subject to factory lead times
The Dwyer - MNS2-9-IN-VM-010 is a Wireless Process Voltage Meter featuring Voltage Bridge, 1' Stripped Leads, 1 Channel, Long Range, North America (900 MHz), and IP65 NEMA 4X. Sold individually.
$305.55
Should ship between 13 Nov and 20 Nov
Subject to factory lead times
The Dwyer - MNS2-9-IN-VM-200 is a Wireless Voltage Meter featuring Voltage Bridge, 1' Stripped Leads, 1 Channel, Long Range, North America (900 MHz), and IP65 NEMA 4X. Sold individually.
$305.55
Should ship between 13 Nov and 20 Nov
Subject to factory lead times
The Dwyer - MNS2-9-IN-WS-WR is a Wireless Water Detection Sensor featuring Detection Rope, 10 ' Sensing Rope, 1 Channel, Long Range, North America (900 MHz), and IP65 NEMA 4X. Sold individually.
$438.04
Should ship between 13 Nov and 20 Nov
Subject to factory lead times
The Dwyer - MNS2-9-W2-AC-VM is a Wireless Accelerometer-Vibration Meter featuring Speed, Frequency, G-force, Integrated, 3 Channels, Long Range, North America (900 MHz), and IP65 NEMA 4X. Sold individually.
$143.18
Should ship between 13 Nov and 20 Nov
Subject to factory lead times
The Dwyer - MNS2-9-W2-CM-020 is a Wireless AC Current Meter featuring Clamp on Transformer, 0 A to 20 A, 3 ' Cable, 1 Channel, Long Range, North America (900 MHz), and General Purpose. Sold individually.
$234.51
Should ship between 13 Nov and 20 Nov
Subject to factory lead times
The Dwyer - MNS2-9-W2-CM-150 is a Wireless AC Current Meter featuring Clamp on Transformer, 0 A to 150 A, 3 ' Cable, 1 Channel, Long Range, North America (900 MHz), and General Purpose. Sold individually.
$268.60
Should ship between 13 Nov and 20 Nov
Subject to factory lead times
The Dwyer - MNS2-9-W2-HU-RH-L25 is a Wireless Humidity Sensor featuring Digital, 25 ' Lead, 1 Channel, Long Range, North America (900 MHz), and General Purpose. Sold individually.
$269.12
Should ship between 13 Nov and 20 Nov
Subject to factory lead times
The Dwyer - MNS2-9-W2-OC-ST is a Wireless Open/Closed Sensor featuring Magnet, Integrated, 1 Channel, Long Range, North America (900 MHz), and General Purpose. Sold individually.
$163.45
Should ship between 13 Nov and 20 Nov
Subject to factory lead times
The Dwyer - MNS2-9-W2-PS-050 is a Wireless Low Pressure Meter featuring 5 V, Absolute Pressure, 3 ' Cable, 1 Channel, Long Range, North America (900 MHz), and General Purpose. Sold individually.
$632.73
Should ship between 13 Nov and 20 Nov
Subject to factory lead times
The Dwyer - MNS2-9-W2-PS-300 is a Wireless Pressure Meter featuring 5 V, Absolute Pressure, 3 ' Cable, 1 Channel, Long Range, North America (900 MHz), and General Purpose. Sold individually.
$632.73
Should ship between 13 Nov and 20 Nov
Subject to factory lead times
The Dwyer - MWTC-D-T-915 is a Wireless Thermocouple Connector & Data Logger featuring Miniature Portable, T-Type, Universal TC, 1 Channel, Short Range, North America (915 MHZ), and Handheld. Part of the MWTC Series. Sold individually.
$364.99$395.88
Should ship between 06 Nov and 13 Nov
Subject to factory lead times
The Dwyer - MXGTW1 is a Gateway-Aggregator featuring 10/100 Ethernet, Wi-Fi, and 100 Devices. Sold individually.
$557.40
Should ship between 27 Nov and 04 Dec
Subject to factory lead times
The Dwyer - OM-CP-RFC1000-IP69K is a Wireless Receiver for OM-CP-RF & Thermalert Datalogger featuring Transceiver, USB, 64 Devices, Global (2.4 GHz), and NEMA Enclosure. Part of the OM-CP Series. Sold individually.
$520.34
Should ship between 06 Nov and 13 Nov
Subject to factory lead times
The Dwyer - OM-SGD-24-M-IP is a Process Digital Panel Meter featuring Color TFT 2.4 " Waterproof Smart Graphics Display, 2.91 " x 1.81 " Size, DC Supply, 2 Analog Voltage I/P, and 2 Open-Collector O/P. Part of the OM-SGD Series. Sold individually.
$381.54
Should ship between 20 Nov and 04 Dec
Subject to factory lead times
The Dwyer - OMDC-130HC100 is a Reversing DC Motor Speed Control featuring 1 HP, 120 Vac, 10 A, 0 Vdc to 90 Vdc O/P, and Chassis Mount. Part of the 130 Series. Sold individually.
$729.29
Should ship between 13 Nov and 20 Nov
Subject to factory lead times
The Dwyer - OME-ET-7026 is an Ethernet Remote I/O Module with Built-In Web Server featuring Process Current, Voltage I/P, 10/s Sample Rate, 2 Inputs, 2 Outputs, ± 10 V, 0 mA to 20 mA, Ethernet, and DC Power. It is rated for a temperature range of 16 °C. Part of the OME-ET-7000 Series. Sold individually.
$1,036.34
Should ship between 13 Nov and 20 Nov
Subject to factory lead times
The Dwyer - OMHT17-278-D-WAA is a Bipolar High Torque Stepper Motor featuring 2-Phase, NEMA 17, Encoder, and 113 oz-in Holding Torque. Part of the OMHT Series. Sold individually.
$411.25
Should ship between 06 Nov and 13 Nov
Subject to factory lead times
The Dwyer - OMHT23-603-D-ZAA is a Bipolar High Torque Stepper Motor featuring 2-Phase, NEMA 23, Encoder, and 354 oz-in Holding Torque. Part of the OMHT Series. Sold individually.
$559.88
Should ship between 13 Nov and 20 Nov
Subject to factory lead times
The Dwyer - OMHT34-490 is a Bipolar High Torque Stepper Motor featuring 2-Phase, NEMA 34, Single Shaft, 1845 oz-in Holding Torque, and 3 m Shielded Cable. Part of the OMHT Series. Sold individually.
$1,110.09
Should ship between 13 Nov and 20 Nov
Subject to factory lead times
The Dwyer - OMHT34-504-D is a Bipolar High Torque Stepper Motor featuring 2-Phase, NEMA 34, Double Shaft, and 396 oz-in Holding Torque. Part of the OMHT Series. Sold individually.
$227.84
Should ship between 13 Nov and 20 Nov
Subject to factory lead times
FAQS
- Process controllers are devices that receive a measurement input from a sensor or transmitter, compare it to a setpoint, and generate an output signal to drive a final control element (valve, heater, pump, etc.). The main types include PID controllers (the industry standard for continuous process control — they use proportional, integral, and derivative algorithms to maintain the process variable at setpoint), process meters (display and monitor process variables with alarm outputs but may not have full PID control capability), and panel meters (display electrical signals — current, voltage, frequency — on a panel for operator visibility). Controllers are available as standalone DIN-rail or panel-mount units, or as software function blocks within a PLC or DCS.
- PID stands for Proportional-Integral-Derivative — three mathematical terms that together calculate the controller's output to minimize the error between the measured process variable and the desired setpoint. The Proportional term responds to the current error (how far the measurement is from setpoint), the Integral term responds to accumulated past error (correcting for persistent offset), and the Derivative term responds to the rate of change of error (dampening overshoot). PID control is the standard because it handles the vast majority of industrial process loops — temperature, pressure, flow, level — reliably and predictably. A well-tuned PID controller brings the process to setpoint quickly, with minimal overshoot, and holds it there despite disturbances. Most modern process controllers include auto-tuning features that automatically calculate optimal PID parameters for the specific loop.
- Start with the process requirements: what variable are you controlling (temperature, pressure, flow, level), what sensor type provides the input (thermocouple, RTD, 4–20 mA transmitter), and what type of output is needed to drive the final control element (4–20 mA analog, relay, SSR driver, pulse). Then consider the control mode — simple on/off control (sufficient for non-critical applications like tank heaters with wide deadbands), PID control (required for tight setpoint control), or more advanced control like cascade, ratio, or ramp/soak profiles (for complex processes like heat treatment or batch reactions). Physical format matters too — 1/16 DIN, 1/8 DIN, and 1/4 DIN sizes refer to the panel cutout dimensions and correspond to different display sizes and feature levels. Finally, verify communication options (RS-485, Modbus, Ethernet) if the controller needs to interface with a PLC, SCADA, or data logging system.
- A process meter measures, displays, and monitors a process variable — it accepts a sensor or transmitter input, shows the current value on a digital display, and can trigger alarm outputs when the value exceeds high or low thresholds. However, a process meter does not generate a modulating control output to drive a valve or heater — it is primarily an indicator and alarm device. A PID controller does everything a process meter does and adds closed-loop control — it continuously calculates and outputs a control signal (4–20 mA, relay, or SSR) to adjust the process and maintain the variable at setpoint. If your application only requires monitoring and alarming (e.g., displaying tank level with a high-level alarm), a process meter is sufficient and more cost-effective. If the application requires active control (e.g., maintaining furnace temperature at 350°F by modulating a gas valve), a PID controller is required.
- A ramp/soak profile is a programmed temperature (or other variable) trajectory that the controller follows over time — ramping the setpoint up or down at a defined rate, then holding (soaking) at a target value for a defined duration, then ramping to the next step. This is essential for processes where the rate of change matters as much as the final value — such as heat treatment (metallurgical tempering, annealing, stress relieving), ceramics firing, curing composites, pharmaceutical drying, and environmental test chambers. A controller with ramp/soak capability can store multi-step programs (e.g., ramp to 500°F at 5°F/minute, hold for 2 hours, ramp to 800°F at 3°F/minute, hold for 1 hour, cool to 200°F at 2°F/minute) and execute them automatically. Controllers vary in the number of steps and programs they can store — verify that the controller supports enough steps for your most complex process profile.