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 - DP32PT-330-DC is an Universal Digital Panel Meter featuring Temperature, Process, Strain, 1/32 DIN, 4 Digit, 9-Segment Programmable 3 Color LED Display, DC Supply, 2 Relay O/P, and USB. Part of the PLATINUM Series. Sold individually.
$413.70$448.71
Should ship between 14 Nov and 21 Nov
Subject to factory lead times
The Dwyer - CNI16D43-C24 is a Temperature featuring Process & Strain Controller, T/C, RTD, Analog V/I, 1 I/P, Pulsed 10 V @ 20 mA, Relay SPDT 3 A @ 120/3 A @ 240 V & Alarm, 2 O/P, 1/16 DIN, AC, 3.5 Digit Dual, and CNi. Sold individually.
$617.54$669.81
Should ship between 14 Nov and 21 Nov
Subject to factory lead times
The Dwyer - CNI16D53 is a PID Controller featuring T/C, RTD, Analog V/I, 1 I/P, Analog Output 0 mA to 20 mA/0 V to 10 V, Solid State Relay/0.5 A @ 120/240 V Continuous, 2 O/P, 1/16 DIN, AC, 3.5 Digit Dual, and CNi. Sold individually.
$518.36$562.23
Should ship between 14 Nov and 21 Nov
Subject to factory lead times
The Dwyer - CNIS3252 is a Temperature featuring Process & Strain Controller, Analog V/I, Strain, 1 I/P, 2x SPDT Relays, 2 O/P, 1/32 DIN, AC, 3.5 Digit Single, Single Ramp & Soak, and CNi. Sold individually.
$496.01$537.99
Should ship between 14 Nov and 21 Nov
Subject to factory lead times
The Dwyer - DPI8-DC is a Digital Panel Meter featuring Universal I/P, Temperature, Process, 1/8 DIN, 3.5 Digit, 9-Segment 3 Color LED Display, and DC Supply. Part of the DPi Series. Sold individually.
$457.45$496.17
Should ship between 14 Nov and 21 Nov
Subject to factory lead times
The Dwyer - DP7007 is a Temperature Panel Meter featuring Alarm On/Off Control & Audible Buzzer, Thermocouple I/P, 3 Digit, Bright Red Color LED Display, 24 Vac/Vdc Supply, and 1 Relay Alarm O/P. It is rated for a temperature range of 32 °F to 999 °F. Part of the DP7000 Series. Sold individually.
$113.52
Should ship between 16 Jan and 23 Jan
Subject to factory lead times
The Dwyer - DP8PT-330-006 is an Universal Digital Panel Meter featuring Temperature, Process, Strain, 1/8 DIN, 4 Digit, 9-Segment Programmable 3 Color LED Display, AC Supply, Analog Current/Voltage, and 2 Relay O/P. Part of the PLATINUM Series. Sold individually.
$552.77$599.55
Should ship between 14 Nov and 21 Nov
Subject to factory lead times
The Dwyer - PTC-16-A is a Digital Timer featuring 24 Programmable, Multi-Functions, Panel Mount, 4 Digit, Backlit LCD Display, AC/DC Supply, and 2x Relay Alarm O/P. Sold individually.
$225.37
Should ship between 14 Nov and 21 Nov
Subject to factory lead times
The Dwyer - CN16D3-SR-2U-CM-AC is a Temperature/Process Controller featuring T/C, RTD, Analog V/I, 1 I/P, DC Pulse, 2 O/P, 1/16 DIN, AC, 3.5 Digit Dual Display, Multiple Ramp & Soak, Serial, and CND3. Sold individually.
$267.99
Should ship between 12 Dec and 19 Dec
Subject to factory lead times
The Dwyer - CNI16D22 is a Temperature featuring Process & Strain Controller, T/C, RTD, Analog V/I, 1 I/P, 2 Relays Form C SPDT 3 A @ 120 V, 3 A @ 240 V, 2 O/P, 1/16 DIN, AC, 3.5 Digit Dual, and CNi. Sold individually.
$518.36$562.23
Should ship between 14 Nov and 21 Nov
Subject to factory lead times
The Dwyer - CNI8-AL is a Temperature & Process Limit Controller featuring 1/8 DIN, 4 Digit, 9-Segment LED Display, AC Supply, Universal I/P, 2 SPDT Relay O/P, 90 Vac to 240 Vac, and High Accuracy. Part of the CNi-AL Series. Sold individually.
$505.01$547.75
Should ship between 14 Nov and 21 Nov
Subject to factory lead times
The Dwyer - SS-002-1-NA is a Smart Wireless Sensor with Cloud Connectivity featuring Thermocouple, RTD Temperature, Humidity, Barometric Pressure, Light, Wall Mount, Long, 915 MHz, 4-CH, and Screw Terminals. Part of the SS-002 (-NA) Series. Sold individually.
$270.04
Should ship between 29 Oct and 03 Nov
Subject to factory lead times
The Dwyer - CN7434 is a Temperature/Process & Limit Controller featuring 1/16 DIN, 4 Digit, 7-Segment LED Display, AC Supply, Universal I/P, and Dual N.O & NC Relay O/P. Part of the CN7400 Series. Sold individually.
$474.96
Should ship between 16 Jan and 23 Jan
Subject to factory lead times
The Dwyer - CN745 is a Temperature Controller featuring Temperature, T/C, RTD, 1 I/P, 4 mA to 20 mA, 1 O/P, 1/16 DIN, AC, 3.5 Digit Dual Display, Serial, and CN740. Sold individually.
$160.20
Should ship between 16 Jan and 23 Jan
Subject to factory lead times
The Dwyer - CN79022 is a Temperature Controller featuring Fuzzy Logic, 2-CH, Thermocouple I/P, 1/32 DIN, 4 Digit, 7-Segment LED Display, 100 Vac to 240 Vac, and DC Pulse/DC Pulse O/P. Part of the CN79000 Series. Sold individually.
$549.78
Should ship between 16 Jan and 23 Jan
Subject to factory lead times
The Dwyer - CNI1653 is a PID Controller featuring T/C, RTD, Analog V/I, 1 I/P, Analog Output 0 mA to 20 mA/0 V to 10 V, Relay SPDT 3 A @ 120/3 A @ 240 V, 2 O/P, 1/16 DIN, AC, 3.5 Digit Single, and CNi. Sold individually.
$482.64$523.49
Should ship between 14 Nov and 21 Nov
Subject to factory lead times
The Dwyer - CNI833-C24-DC-AL is a Temperature featuring Process & Strain Controller, T/C, RTD, Analog V/I, 1 I/P, 2 Form C Relay, 2 O/P, 1/8 DIN, DC, 3.5 Digit Single, Serial, and CNi. Sold individually.
$714.97$775.48
Should ship between 14 Nov and 21 Nov
Subject to factory lead times
The Dwyer - CNI833-EIT is a Temperature featuring Process & Strain Controller, T/C, RTD, Analog V/I, 1 I/P, SPDT Relay, Relay SPDT 3 A @ 120/3 A @ 240 V, 2 O/P, 1/8 DIN, AC, 3.5 Digit Single, Ethernet, and CNi. Sold individually.
$670.27$727.00
Should ship between 14 Nov and 21 Nov
Subject to factory lead times
The Dwyer - D8200 is an USB Interface Module featuring Process Current I/P, 25/s Sample Rate, 7 Inputs, ± 20 mA, DC Power, and Modbus RTU. It is rated for a temperature range of 16 °C. Part of the D8000 Series. Sold individually.
$525.16
Should ship between 14 Nov and 21 Nov
Subject to factory lead times
The Dwyer - INET-600 is a Data Acquisition System featuring Direct-to-Sensor USB, High Accuracy, Universal I/P, 4000/s Sample Rate, 16 Inputs, 4 I/O, and USB Power. It is rated for a temperature range of 16 °C. Part of the iNET-600 Series. Sold individually.
$819.81
Should ship between 14 Nov and 21 Nov
Subject to factory lead times
The Dwyer - OMB-DAQ-2408-2AO is a Data Acquisition Module featuring 24-Bit Multifunction, TC, Process Voltage I/P, Temperature, Process I/P Class, 1000/s Sample Rate, 8I/O, ± 10 V, and USB Power. It is rated for a temperature range of 24 °C. Part of the OMB-DAQ-2408 Series. Sold individually.
$1,146.70
Should ship between 24 Apr and 08 May
Subject to factory lead times
The Dwyer - DPS20-HV-AO is a Load Cell Panel Meter featuring 1/8 DIN, 6 Digit, Red Color LED Display, Isolated High-Voltage 85/265Vac/Vdc Power Supply, and Analog O/P. Part of the DPS20 Series. Sold individually.
$542.20
Should ship between 02 Nov and 05 Nov
Subject to factory lead times
The Dwyer - HX15-W is a Relative Humidity/Temperature Transmitter featuring High Temperature, 3 % to 95 %, 7 Vdc to 30 Vdc, 4 mA to 20 mA (x2), Wall Mount, 229 mm Probe, and NEMA 4X Enclosure. It is rated for a temperature range of -40 °C to 180 °C. Part of the HX15 Series. Sold individually.
$981.91
Should ship between 28 Nov and 05 Dec
Subject to factory lead times
The Dwyer - INET-100HC is a Data Acquisition System featuring Direct Sensor, Universal I/P, 166000/s, 16 Inputs, 8 Outputs, 8 I/O, ± 5 V, USB, AC Adaptor Power, INET-240, and 15 mA Excitation. It is rated for a temperature range of 14 °C. Part of the iNet-100 Series. Sold individually.
$2,133.76
Should ship between 14 Nov and 21 Nov
Subject to factory lead times
The Dwyer - DP32PT-330-DC is an Universal Digital Panel Meter featuring Temperature, Process, Strain, 1/32 DIN, 4 Digit, 9-Segment Programmable 3 Color LED Display, DC Supply, 2 Relay O/P, and USB. Part of the PLATINUM Series. Sold individually.
$413.70$448.71
Should ship between 14 Nov and 21 Nov
Subject to factory lead times
The Dwyer - CNI16D43-C24 is a Temperature featuring Process & Strain Controller, T/C, RTD, Analog V/I, 1 I/P, Pulsed 10 V @ 20 mA, Relay SPDT 3 A @ 120/3 A @ 240 V & Alarm, 2 O/P, 1/16 DIN, AC, 3.5 Digit Dual, and CNi. Sold individually.
$617.54$669.81
Should ship between 14 Nov and 21 Nov
Subject to factory lead times
The Dwyer - CNI16D53 is a PID Controller featuring T/C, RTD, Analog V/I, 1 I/P, Analog Output 0 mA to 20 mA/0 V to 10 V, Solid State Relay/0.5 A @ 120/240 V Continuous, 2 O/P, 1/16 DIN, AC, 3.5 Digit Dual, and CNi. Sold individually.
$518.36$562.23
Should ship between 14 Nov and 21 Nov
Subject to factory lead times
The Dwyer - CNIS3252 is a Temperature featuring Process & Strain Controller, Analog V/I, Strain, 1 I/P, 2x SPDT Relays, 2 O/P, 1/32 DIN, AC, 3.5 Digit Single, Single Ramp & Soak, and CNi. Sold individually.
$496.01$537.99
Should ship between 14 Nov and 21 Nov
Subject to factory lead times
The Dwyer - DPI8-DC is a Digital Panel Meter featuring Universal I/P, Temperature, Process, 1/8 DIN, 3.5 Digit, 9-Segment 3 Color LED Display, and DC Supply. Part of the DPi Series. Sold individually.
$457.45$496.17
Should ship between 14 Nov and 21 Nov
Subject to factory lead times
The Dwyer - DP7007 is a Temperature Panel Meter featuring Alarm On/Off Control & Audible Buzzer, Thermocouple I/P, 3 Digit, Bright Red Color LED Display, 24 Vac/Vdc Supply, and 1 Relay Alarm O/P. It is rated for a temperature range of 32 °F to 999 °F. Part of the DP7000 Series. Sold individually.
$113.52
Should ship between 16 Jan and 23 Jan
Subject to factory lead times
The Dwyer - DP8PT-330-006 is an Universal Digital Panel Meter featuring Temperature, Process, Strain, 1/8 DIN, 4 Digit, 9-Segment Programmable 3 Color LED Display, AC Supply, Analog Current/Voltage, and 2 Relay O/P. Part of the PLATINUM Series. Sold individually.
$552.77$599.55
Should ship between 14 Nov and 21 Nov
Subject to factory lead times
The Dwyer - PTC-16-A is a Digital Timer featuring 24 Programmable, Multi-Functions, Panel Mount, 4 Digit, Backlit LCD Display, AC/DC Supply, and 2x Relay Alarm O/P. Sold individually.
$225.37
Should ship between 14 Nov and 21 Nov
Subject to factory lead times
The Dwyer - CN16D3-SR-2U-CM-AC is a Temperature/Process Controller featuring T/C, RTD, Analog V/I, 1 I/P, DC Pulse, 2 O/P, 1/16 DIN, AC, 3.5 Digit Dual Display, Multiple Ramp & Soak, Serial, and CND3. Sold individually.
$267.99
Should ship between 12 Dec and 19 Dec
Subject to factory lead times
The Dwyer - CNI16D22 is a Temperature featuring Process & Strain Controller, T/C, RTD, Analog V/I, 1 I/P, 2 Relays Form C SPDT 3 A @ 120 V, 3 A @ 240 V, 2 O/P, 1/16 DIN, AC, 3.5 Digit Dual, and CNi. Sold individually.
$518.36$562.23
Should ship between 14 Nov and 21 Nov
Subject to factory lead times
The Dwyer - CNI8-AL is a Temperature & Process Limit Controller featuring 1/8 DIN, 4 Digit, 9-Segment LED Display, AC Supply, Universal I/P, 2 SPDT Relay O/P, 90 Vac to 240 Vac, and High Accuracy. Part of the CNi-AL Series. Sold individually.
$505.01$547.75
Should ship between 14 Nov and 21 Nov
Subject to factory lead times
The Dwyer - SS-002-1-NA is a Smart Wireless Sensor with Cloud Connectivity featuring Thermocouple, RTD Temperature, Humidity, Barometric Pressure, Light, Wall Mount, Long, 915 MHz, 4-CH, and Screw Terminals. Part of the SS-002 (-NA) Series. Sold individually.
$270.04
Should ship between 29 Oct and 03 Nov
Subject to factory lead times
The Dwyer - CN7434 is a Temperature/Process & Limit Controller featuring 1/16 DIN, 4 Digit, 7-Segment LED Display, AC Supply, Universal I/P, and Dual N.O & NC Relay O/P. Part of the CN7400 Series. Sold individually.
$474.96
Should ship between 16 Jan and 23 Jan
Subject to factory lead times
The Dwyer - CN745 is a Temperature Controller featuring Temperature, T/C, RTD, 1 I/P, 4 mA to 20 mA, 1 O/P, 1/16 DIN, AC, 3.5 Digit Dual Display, Serial, and CN740. Sold individually.
$160.20
Should ship between 16 Jan and 23 Jan
Subject to factory lead times
The Dwyer - CN79022 is a Temperature Controller featuring Fuzzy Logic, 2-CH, Thermocouple I/P, 1/32 DIN, 4 Digit, 7-Segment LED Display, 100 Vac to 240 Vac, and DC Pulse/DC Pulse O/P. Part of the CN79000 Series. Sold individually.
$549.78
Should ship between 16 Jan and 23 Jan
Subject to factory lead times
The Dwyer - CNI1653 is a PID Controller featuring T/C, RTD, Analog V/I, 1 I/P, Analog Output 0 mA to 20 mA/0 V to 10 V, Relay SPDT 3 A @ 120/3 A @ 240 V, 2 O/P, 1/16 DIN, AC, 3.5 Digit Single, and CNi. Sold individually.
$482.64$523.49
Should ship between 14 Nov and 21 Nov
Subject to factory lead times
The Dwyer - CNI833-C24-DC-AL is a Temperature featuring Process & Strain Controller, T/C, RTD, Analog V/I, 1 I/P, 2 Form C Relay, 2 O/P, 1/8 DIN, DC, 3.5 Digit Single, Serial, and CNi. Sold individually.
$714.97$775.48
Should ship between 14 Nov and 21 Nov
Subject to factory lead times
The Dwyer - CNI833-EIT is a Temperature featuring Process & Strain Controller, T/C, RTD, Analog V/I, 1 I/P, SPDT Relay, Relay SPDT 3 A @ 120/3 A @ 240 V, 2 O/P, 1/8 DIN, AC, 3.5 Digit Single, Ethernet, and CNi. Sold individually.
$670.27$727.00
Should ship between 14 Nov and 21 Nov
Subject to factory lead times
The Dwyer - D8200 is an USB Interface Module featuring Process Current I/P, 25/s Sample Rate, 7 Inputs, ± 20 mA, DC Power, and Modbus RTU. It is rated for a temperature range of 16 °C. Part of the D8000 Series. Sold individually.
$525.16
Should ship between 14 Nov and 21 Nov
Subject to factory lead times
The Dwyer - INET-600 is a Data Acquisition System featuring Direct-to-Sensor USB, High Accuracy, Universal I/P, 4000/s Sample Rate, 16 Inputs, 4 I/O, and USB Power. It is rated for a temperature range of 16 °C. Part of the iNET-600 Series. Sold individually.
$819.81
Should ship between 14 Nov and 21 Nov
Subject to factory lead times
The Dwyer - OMB-DAQ-2408-2AO is a Data Acquisition Module featuring 24-Bit Multifunction, TC, Process Voltage I/P, Temperature, Process I/P Class, 1000/s Sample Rate, 8I/O, ± 10 V, and USB Power. It is rated for a temperature range of 24 °C. Part of the OMB-DAQ-2408 Series. Sold individually.
$1,146.70
Should ship between 24 Apr and 08 May
Subject to factory lead times
The Dwyer - DPS20-HV-AO is a Load Cell Panel Meter featuring 1/8 DIN, 6 Digit, Red Color LED Display, Isolated High-Voltage 85/265Vac/Vdc Power Supply, and Analog O/P. Part of the DPS20 Series. Sold individually.
$542.20
Should ship between 02 Nov and 05 Nov
Subject to factory lead times
The Dwyer - HX15-W is a Relative Humidity/Temperature Transmitter featuring High Temperature, 3 % to 95 %, 7 Vdc to 30 Vdc, 4 mA to 20 mA (x2), Wall Mount, 229 mm Probe, and NEMA 4X Enclosure. It is rated for a temperature range of -40 °C to 180 °C. Part of the HX15 Series. Sold individually.
$981.91
Should ship between 28 Nov and 05 Dec
Subject to factory lead times
The Dwyer - INET-100HC is a Data Acquisition System featuring Direct Sensor, Universal I/P, 166000/s, 16 Inputs, 8 Outputs, 8 I/O, ± 5 V, USB, AC Adaptor Power, INET-240, and 15 mA Excitation. It is rated for a temperature range of 14 °C. Part of the iNet-100 Series. Sold individually.
$2,133.76
Should ship between 14 Nov and 21 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.