Controllers - Dwyer
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 from Dwyer (3)
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.
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.
Test Gauges
Test gauges, also known as calibration gauges, are specialized instruments used to verify and calibrate the accuracy of other pressure measuring devices. They are typically manufactured with high precision and accuracy, ensuring reliable calibration results. Test gauges are often used in calibration laboratories, manufacturing facilities, and quality control processes to calibrate and validate the performance of pressure gauges and other pressure measurement instruments. These gauges are built to meet strict accuracy standards and can measure a wide range of pressure values, making them essential tools in maintaining the accuracy and reliability of pressure measurement equipment.
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The Dwyer - HX303AC is a Relative Humidity/Temperature Transmitter featuring 0 % to 100 %, 12 Vdc to 40 Vdc, 4 mA to 20 mA, and Wall Mount. It is rated for a temperature range of 0 °C to 100 °C (32 °F to 122 °F). Part of the HX300A Series. Sold individually.
$365.19
Should ship between 27 Nov and 04 Dec
Subject to factory lead times
The Dwyer - CN3261-JF is a High-Limit Temperature Controller featuring Analog, AC Supply, J Thermocouple I/P, 3 A SPDT Relay O/P, and 35 mm DIN Rail. It is rated for a temperature range of -18 °C to 760 °C (0 °F to 1400 °F). Part of the CN3261 Series. Sold individually.
$609.53
Should ship between 20 Nov and 04 Dec
Subject to factory lead times
The Dwyer - DRST-UN is a Signal Transmitter featuring DIN Rail Compatible, TC/RTD/Resistance/Pot/mA/V I/P Type, Universal, mA/V O/P Type, Process, AC/DC, 2300 V, Programmer Display, and Display Programmer. Sold individually.
$298.78
Should ship between 22 Jan and 29 Jan
Subject to factory lead times
The Dwyer - HX92BC is a Relative Humidity Transmitter featuring 0 % to 100 %, 9 Vdc to 30 Vdc, 4 mA to 20 mA, and Wall Mount. Part of the HX92B Series. Sold individually.
$423.08$458.89
Should ship between 15 Jan and 22 Jan
Subject to factory lead times
The Dwyer - DP25B-E is a Process Panel Meter featuring 1/8 DIN, 3.5 Digit, 9-Segment Selectable Color LED Display, and AC Supply. Part of the DP25B Series. Sold individually.
$494.12$535.94
Should ship between 13 Nov and 20 Nov
Subject to factory lead times
The Dwyer - HX93BC is a Relative Humidity/Temperature Transmitter featuring 0 % to 100 %, 9 Vdc to 30 Vdc, 4 mA to 20 mA, and Wall Mount. It is rated for a temperature range of -30 °C to 75 °C. Part of the HX93B Series. Sold individually.
$531.50$576.48
Should ship between 15 Jan and 22 Jan
Subject to factory lead times
The Dwyer - CN7833 is a Ramp & Soak Controller featuring T/C, RTD, Analog V/I, 1 I/P, Relay/Relay, 2 O/P, 1/16 DIN, AC, 3.5 Digit Dual, 2x Alarm Outputs, Multiple Ramp & Soak, Serial, and CN7800. Sold individually.
$196.09
Should ship between 15 Jan and 22 Jan
Subject to factory lead times
The Dwyer - DP20-A1-A2 is a Multi-signal Panel Meter featuring Universal I/P, Temperature, Process, Power, 1/8 DIN, 3.5 Digit, Red Color LED Display, AC/DC Supply, and 2 Relay O/P. Part of the DP20 Series. Sold individually.
$248.43
Should ship between 13 Nov and 20 Nov
Subject to factory lead times
The Dwyer - CNI3233 is a Temperature featuring Process & Strain Controller, T/C, RTD, Analog V/I, 1 I/P, 1x Solid State Relay & 1x Pulsed Driver, 2 O/P, 1/32 DIN, AC, 3.5 Digit Single, and CNi. Sold individually.
$394.26$427.63
Should ship between 13 Nov and 20 Nov
Subject to factory lead times
The Dwyer - DP7002 is a Temperature Panel Meter featuring Alarm/On/Off Control & Audible Buzzer, Thermocouple I/P, 3 Digit, Bright Red Color LED Display, 110 Vac Supply, and 1 Relay Alarm O/P. It is rated for a temperature range of 0 °C to 999 °C. Part of the DP7000 Series. Sold individually.
$132.47
Should ship between 15 Jan and 22 Jan
Subject to factory lead times
The Dwyer - SSRL240AC10 is a High Reliability Solid State Relay featuring 1-Phase, 24 Vac to 280 Vac Line Voltage, 10 A, 90 Vac to 280 Vac O/P, AC Control Signal, and Screw Mount. Part of the SSRL Series. Sold individually.
$51.99
Should ship between 26 Feb and 05 Mar
Subject to factory lead times
The Dwyer - SSRDIN600DC20 is a Solid State Relay featuring 1-Phase, 48 Vac to 600 Vac Line Voltage, 20 A, 4 Vdc to 32 Vdc SCR O/P, DC Control Signal, and DIN Rail Mount. Part of the SSRDIN Series. Sold individually.
$122.73
Should ship between 26 Feb and 05 Mar
Subject to factory lead times
The Dwyer - HX93BV1-RP1 is a Relative Humidity/Temperature Transmitter featuring 0 % to 100 %, 9 Vdc to 30 Vdc, 0 Vdc to 5 Vdc, and Remote Probe. It is rated for a temperature range of -30 °C to 75 °C. Part of the HX93B Series. Sold individually.
$591.51$641.57
Should ship between 15 Jan and 22 Jan
Subject to factory lead times
The Dwyer - DP7001 is a Temperature Panel Meter featuring Alarm/On/Off Control & Audible Buzzer, Thermocouple I/P, 3 Digit, Bright Red Color LED Display, 110 Vac 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.
$132.47
Should ship between 15 Jan and 22 Jan
Subject to factory lead times
The Dwyer - CN8501TC-R1 is a Temperature/Process Controller featuring T/C, 1 I/P, Relay, 1 O/P, 1/16 DIN, AC, 3.5 Digit Dual Display, Heat, and CN8500. Sold individually.
$616.19
Should ship between 20 Nov and 04 Dec
Subject to factory lead times
The Dwyer - SSRL240AC25 is a High Reliability Solid State Relay featuring 1-Phase, 24 Vac to 280 Vac Line Voltage, 25 A, 90 Vac to 280 Vac O/P, AC Control Signal, and Screw Mount. Part of the SSRL Series. Sold individually.
$64.14
Should ship between 26 Feb and 05 Mar
Subject to factory lead times
The Dwyer - DP20-A1 is a Multi-signal Panel Meter featuring Universal I/P, Temperature, Process, Power, 1/8 DIN, 3.5 Digit, Red Color LED Display, AC/DC Supply, and 1 Relay O/P. Part of the DP20 Series. Sold individually.
$228.58
Should ship between 01 Nov and 04 Nov
Subject to factory lead times
The Dwyer - DP606A is an Universal Panel Meter featuring 6-CH, 1/4 DIN, 4 Digit, 7-Segment LED Display, 240 Vac Supply, 240 Vac Power & 2x Relay O/P, and RS232/485. Part of the DP606A Series. Sold individually.
$1,112.40$1,206.55
Should ship between 13 Nov and 20 Nov
Subject to factory lead times
The Dwyer - CNI32-AL-DC is a Temperature & Process Limit Controller featuring 1/32 DIN, 4 Digit, 9-Segment LED Display DC Supply, Universal I/P, 2 SPDT Relay O/P, 12 Vdc to 36 Vdc, and High Accuracy. Part of the CNi-AL Series. Sold individually.
$408.04$442.57
Should ship between 13 Nov and 20 Nov
Subject to factory lead times
The Dwyer - CNI3233-C24-DC is a Temperature featuring Process & Strain Controller, T/C, RTD, Analog V/I, 1 I/P, 2x SPDT Relays & Alarm, 2 O/P, 1/32 DIN, DC, 3.5 Digit Single, Single Ramp & Soak, and CNi. Sold individually.
$589.87$639.79
Should ship between 13 Nov and 20 Nov
Subject to factory lead times
The Dwyer - HX94CW is a Relative Humidity/Temperature Transmitter featuring Duct Style, 0 % to 100 %, 6 Vdc to 30 Vdc, 4 mA to 20 mA, SS NEMA 4 Housing, and 1 m Lead Wires. It is rated for a temperature range of 0 °C to 100 °C. Part of the HX94 Series. Sold individually.
$538.81
Should ship between 27 Nov and 04 Dec
Subject to factory lead times
The Dwyer - D3132 is a PC to Analog Output Module featuring Digital In, Analog Out, 3 Inputs, 1 Output, ± 5 V, RS-485, and DC Power. Part of the D3000 Series. Sold individually.
$477.89
Should ship between 27 Nov and 04 Dec
Subject to factory lead times
The Dwyer - CNI1654-C24-DC 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, Pulsed Driver 10 V @ 20mA/for Use with External SSR, 2 O/P, 1/16 DIN, DC, 3.5 Digit Single, Serial, and CNi. Sold individually.
$626.01$678.99
Should ship between 13 Nov and 20 Nov
Subject to factory lead times
The Dwyer - CN708 is a Limit Controller with Audible Buzzer featuring 2.8 " x 1.14 ", 3 Digit, LED Display, AC/DC Supply, J/K/S Thermocouple I/P, 24 Vac/Vdc, °C, and 15 A SPDT Relay O/P. Part of the CN700 Series. Sold individually.
$163.02
Should ship between 15 Jan and 22 Jan
Subject to factory lead times
The Dwyer - HX303AC is a Relative Humidity/Temperature Transmitter featuring 0 % to 100 %, 12 Vdc to 40 Vdc, 4 mA to 20 mA, and Wall Mount. It is rated for a temperature range of 0 °C to 100 °C (32 °F to 122 °F). Part of the HX300A Series. Sold individually.
$365.19
Should ship between 27 Nov and 04 Dec
Subject to factory lead times
The Dwyer - CN3261-JF is a High-Limit Temperature Controller featuring Analog, AC Supply, J Thermocouple I/P, 3 A SPDT Relay O/P, and 35 mm DIN Rail. It is rated for a temperature range of -18 °C to 760 °C (0 °F to 1400 °F). Part of the CN3261 Series. Sold individually.
$609.53
Should ship between 20 Nov and 04 Dec
Subject to factory lead times
The Dwyer - DRST-UN is a Signal Transmitter featuring DIN Rail Compatible, TC/RTD/Resistance/Pot/mA/V I/P Type, Universal, mA/V O/P Type, Process, AC/DC, 2300 V, Programmer Display, and Display Programmer. Sold individually.
$298.78
Should ship between 22 Jan and 29 Jan
Subject to factory lead times
The Dwyer - HX92BC is a Relative Humidity Transmitter featuring 0 % to 100 %, 9 Vdc to 30 Vdc, 4 mA to 20 mA, and Wall Mount. Part of the HX92B Series. Sold individually.
$423.08$458.89
Should ship between 15 Jan and 22 Jan
Subject to factory lead times
The Dwyer - DP25B-E is a Process Panel Meter featuring 1/8 DIN, 3.5 Digit, 9-Segment Selectable Color LED Display, and AC Supply. Part of the DP25B Series. Sold individually.
$494.12$535.94
Should ship between 13 Nov and 20 Nov
Subject to factory lead times
The Dwyer - HX93BC is a Relative Humidity/Temperature Transmitter featuring 0 % to 100 %, 9 Vdc to 30 Vdc, 4 mA to 20 mA, and Wall Mount. It is rated for a temperature range of -30 °C to 75 °C. Part of the HX93B Series. Sold individually.
$531.50$576.48
Should ship between 15 Jan and 22 Jan
Subject to factory lead times
The Dwyer - CN7833 is a Ramp & Soak Controller featuring T/C, RTD, Analog V/I, 1 I/P, Relay/Relay, 2 O/P, 1/16 DIN, AC, 3.5 Digit Dual, 2x Alarm Outputs, Multiple Ramp & Soak, Serial, and CN7800. Sold individually.
$196.09
Should ship between 15 Jan and 22 Jan
Subject to factory lead times
The Dwyer - DP20-A1-A2 is a Multi-signal Panel Meter featuring Universal I/P, Temperature, Process, Power, 1/8 DIN, 3.5 Digit, Red Color LED Display, AC/DC Supply, and 2 Relay O/P. Part of the DP20 Series. Sold individually.
$248.43
Should ship between 13 Nov and 20 Nov
Subject to factory lead times
The Dwyer - CNI3233 is a Temperature featuring Process & Strain Controller, T/C, RTD, Analog V/I, 1 I/P, 1x Solid State Relay & 1x Pulsed Driver, 2 O/P, 1/32 DIN, AC, 3.5 Digit Single, and CNi. Sold individually.
$394.26$427.63
Should ship between 13 Nov and 20 Nov
Subject to factory lead times
The Dwyer - DP7002 is a Temperature Panel Meter featuring Alarm/On/Off Control & Audible Buzzer, Thermocouple I/P, 3 Digit, Bright Red Color LED Display, 110 Vac Supply, and 1 Relay Alarm O/P. It is rated for a temperature range of 0 °C to 999 °C. Part of the DP7000 Series. Sold individually.
$132.47
Should ship between 15 Jan and 22 Jan
Subject to factory lead times
The Dwyer - SSRL240AC10 is a High Reliability Solid State Relay featuring 1-Phase, 24 Vac to 280 Vac Line Voltage, 10 A, 90 Vac to 280 Vac O/P, AC Control Signal, and Screw Mount. Part of the SSRL Series. Sold individually.
$51.99
Should ship between 26 Feb and 05 Mar
Subject to factory lead times
The Dwyer - SSRDIN600DC20 is a Solid State Relay featuring 1-Phase, 48 Vac to 600 Vac Line Voltage, 20 A, 4 Vdc to 32 Vdc SCR O/P, DC Control Signal, and DIN Rail Mount. Part of the SSRDIN Series. Sold individually.
$122.73
Should ship between 26 Feb and 05 Mar
Subject to factory lead times
The Dwyer - HX93BV1-RP1 is a Relative Humidity/Temperature Transmitter featuring 0 % to 100 %, 9 Vdc to 30 Vdc, 0 Vdc to 5 Vdc, and Remote Probe. It is rated for a temperature range of -30 °C to 75 °C. Part of the HX93B Series. Sold individually.
$591.51$641.57
Should ship between 15 Jan and 22 Jan
Subject to factory lead times
The Dwyer - DP7001 is a Temperature Panel Meter featuring Alarm/On/Off Control & Audible Buzzer, Thermocouple I/P, 3 Digit, Bright Red Color LED Display, 110 Vac 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.
$132.47
Should ship between 15 Jan and 22 Jan
Subject to factory lead times
The Dwyer - CN8501TC-R1 is a Temperature/Process Controller featuring T/C, 1 I/P, Relay, 1 O/P, 1/16 DIN, AC, 3.5 Digit Dual Display, Heat, and CN8500. Sold individually.
$616.19
Should ship between 20 Nov and 04 Dec
Subject to factory lead times
The Dwyer - SSRL240AC25 is a High Reliability Solid State Relay featuring 1-Phase, 24 Vac to 280 Vac Line Voltage, 25 A, 90 Vac to 280 Vac O/P, AC Control Signal, and Screw Mount. Part of the SSRL Series. Sold individually.
$64.14
Should ship between 26 Feb and 05 Mar
Subject to factory lead times
The Dwyer - DP20-A1 is a Multi-signal Panel Meter featuring Universal I/P, Temperature, Process, Power, 1/8 DIN, 3.5 Digit, Red Color LED Display, AC/DC Supply, and 1 Relay O/P. Part of the DP20 Series. Sold individually.
$228.58
Should ship between 01 Nov and 04 Nov
Subject to factory lead times
The Dwyer - DP606A is an Universal Panel Meter featuring 6-CH, 1/4 DIN, 4 Digit, 7-Segment LED Display, 240 Vac Supply, 240 Vac Power & 2x Relay O/P, and RS232/485. Part of the DP606A Series. Sold individually.
$1,112.40$1,206.55
Should ship between 13 Nov and 20 Nov
Subject to factory lead times
The Dwyer - CNI32-AL-DC is a Temperature & Process Limit Controller featuring 1/32 DIN, 4 Digit, 9-Segment LED Display DC Supply, Universal I/P, 2 SPDT Relay O/P, 12 Vdc to 36 Vdc, and High Accuracy. Part of the CNi-AL Series. Sold individually.
$408.04$442.57
Should ship between 13 Nov and 20 Nov
Subject to factory lead times
The Dwyer - CNI3233-C24-DC is a Temperature featuring Process & Strain Controller, T/C, RTD, Analog V/I, 1 I/P, 2x SPDT Relays & Alarm, 2 O/P, 1/32 DIN, DC, 3.5 Digit Single, Single Ramp & Soak, and CNi. Sold individually.
$589.87$639.79
Should ship between 13 Nov and 20 Nov
Subject to factory lead times
The Dwyer - HX94CW is a Relative Humidity/Temperature Transmitter featuring Duct Style, 0 % to 100 %, 6 Vdc to 30 Vdc, 4 mA to 20 mA, SS NEMA 4 Housing, and 1 m Lead Wires. It is rated for a temperature range of 0 °C to 100 °C. Part of the HX94 Series. Sold individually.
$538.81
Should ship between 27 Nov and 04 Dec
Subject to factory lead times
The Dwyer - D3132 is a PC to Analog Output Module featuring Digital In, Analog Out, 3 Inputs, 1 Output, ± 5 V, RS-485, and DC Power. Part of the D3000 Series. Sold individually.
$477.89
Should ship between 27 Nov and 04 Dec
Subject to factory lead times
The Dwyer - CNI1654-C24-DC 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, Pulsed Driver 10 V @ 20mA/for Use with External SSR, 2 O/P, 1/16 DIN, DC, 3.5 Digit Single, Serial, and CNi. Sold individually.
$626.01$678.99
Should ship between 13 Nov and 20 Nov
Subject to factory lead times
The Dwyer - CN708 is a Limit Controller with Audible Buzzer featuring 2.8 " x 1.14 ", 3 Digit, LED Display, AC/DC Supply, J/K/S Thermocouple I/P, 24 Vac/Vdc, °C, and 15 A SPDT Relay O/P. Part of the CN700 Series. Sold individually.
$163.02
Should ship between 15 Jan and 22 Jan
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.