Pneumatic and Electronic Controls
We provide various products, including valves, motion control, electrical enclosures, HMIs, power tools, and electric control systems. In addition to these products, we offer compressed air products to power pneuma...
Pneumatic directional control valves are pivotal components within pneumatic systems, responsible for determining the path of compressed air flow and subsequently controlling the movement of actuators. These valves govern the direction in which air travels, enabling the activation and deactivation of pneumatic cylinders or other actuators that perform mechanical tasks. With the ability to switch between multiple ports, pneumatic directional control valves facilitate intricate automation processes, allowing machinery to execute precise movements and sequences. Whether in manufacturing lines, robotics, or other industrial settings, these valves are indispensable for achieving efficient and accurate motion control, contributing to enhanced productivity and streamlined operations.
Shop by type: Manifold Assembly Kit | Regulators | Directional Control Valves | Solenoid Coils | Special Purpose Valves | ISO Valves | Ceram Valves | Valves Parts and Kits
Related categories: Pneumatic and Electronic Controls | HMIs | Electric Power Tools | Pneumatic Check Valves | Pneumatic Accessories
Pneumatic cylinders and actuators are used in a variety of industrial applications. Pneumatic cylinders and actuators use compressed air to create a force in a linear or rotary motion. Pneumatic cylinders come in various sizes and shapes and can be used for many different applications. Pneumatic cylinders and actuators are an essential part of many industries, and we are proud to offer our customers a wide selection of products. We carry a complete selection of pneumatic cylinders and actuators, including rotary actuators and linear cylinders. Our pneumatic cylinders and actuators are available in various sizes and configurations, making it easy to find the perfect product for your application. Please browse our website or contact us today to learn more about our pneumatic cylinder and actuator offerings.
Shop by type: Electric Linear Actuator | Pneumatic Cylinder | Rotary Actuators | Linear Cylinders | Clamps | NFPA Cylinders | Seal and Repair Kits | Rodless Cylinders
Related categories: Pneumatic and Electronic Controls | Enclosures | Software | Motor Control | Pneumatic Accessories
Pneumatic accessories connect, protect and fine-tune compressed air systems. Fittings, tubing, check valves, flow controls and filters may be small parts, but they have a big effect on machine performance, air consumption and reliability.
Pneumatic Accessories
- Pneumatic fittings and tubing – push-to-connect, compression and barbed
- Check and flow control valves – control direction and speed
- In-line filters – point-of-use protection for valves and actuators
- Air volume tanks – supply surges for high-demand cycles
- Air valve switches and relief valves – sensing and overpressure protection
Choosing Accessories
Match tube size and material (polyurethane, nylon, PTFE) to pressure, flexibility and chemical exposure. Use flow controls to set cylinder speed. Fixing small leaks in fittings and tubing is one of the easiest ways to cut compressed air costs.
Centro carries pneumatic accessories to build, maintain and improve air systems.
Shop by type: In-Line Filters | Check Valves and Flow Valves | Pneumatic Fittings | Tubing | Air Volume Tanks | Air Valve Switches | Pneumatic Relief Valves | Tubing Components
Related categories: Pneumatic and Electronic Controls | Software | Pneumatic Check Valves | Pneumatic Cylinders and Actuators | Electric Power Tools
Electrical enclosures protect control equipment from dust, water, chemicals and impact, and protect people from live components. The right enclosure is essential for safe, reliable control panels.
Enclosure Types
- Standard enclosures – wall-mount, floor-standing and junction boxes
- Custom enclosures – built to your dimensions and cutouts
- Stainless and fiberglass – corrosion resistance and washdown
- Accessories – back panels, locks, windows and thermal management
Choosing an Enclosure
Select the NEMA or IP rating for the environment, then size it for components with room for wiring and heat dissipation. Consider material, mounting and access needs.
Centro supplies standard enclosures for control panels, plus custom enclosures made to order by leading manufacturers.
Shop by type: Custom Enclosures | Standard Enclosures
Related categories: Pneumatic and Electronic Controls | Motor Control | Pneumatic Cylinders and Actuators | PLCs/Smart Relays | Software
A human machine interface (HMI) is the screen operators use to run and monitor equipment. A well-chosen HMI shows the right information clearly, makes alarms easy to understand and cuts down on operator errors, from a single machine up to a whole process line.
HMI Options
- Touchscreen operator panels – 4" to 15"+ displays for machine-level control
- Industrial panel PCs – run SCADA and advanced visualization software
- Text displays and keypads – simple, rugged interfaces for basic equipment
- Web-enabled and remote HMIs – view and control machines from a browser or mobile device
- HMI accessories – mounting kits, cables, protective covers and software
Choosing an HMI
Start with communication: make sure the HMI supports your PLC's protocol, such as EtherNet/IP, Modbus or PROFINET. Then size the screen for the information operators need and check the panel cutout, environmental rating and sunlight readability. Software licensing and ease of programming also affect long-term cost.
Centro offers HMIs and accessories from leading automation brands and can help you pick one that works with your existing controls.
Related categories: Pneumatic and Electronic Controls | Electric Power Tools | Pneumatic Directional Control Valves | Pneumatic Check Valves | Pneumatic Accessories
Centro carries VFDs, soft starters, contactors, overload relays and motor control accessories from leading brands to build or repair motor control panels. Industrial motor controllers are devices that regulate the speed and torque of an electric motor. VFDs control the speed of an AC induction motor's speed by varying the power supply frequency. DC drives do the same thing but for DC motors. On the other hand, soft starters gradually ramp the voltage to an electric motor to avoid mechanical stress and electrical damage that can occur when starting a motor from a dead stop. Industrial motor controllers are used in various applications where precise control of an electric motor is required, such as in pumps, fans, compressors, conveyors, and machine tools. Motor control products we carry include contactors, variable frequency drives, DC drives, and soft starters. These products are available in various sizes and configurations to suit any application. Whether you need a simple contactor for a small motor or a complex multi-drive system for an extensive industrial process, we have the products you need to get the job done. Please browse our website to learn more.
Shop by type: Overload Relays | Line Reactors and Output Filters | Variable Frequency Drives | Configured Drives / Control Systems | DC Drives | Manual Starters | Contactors | Control Relays
Related categories: Pneumatic and Electronic Controls | PLCs/Smart Relays | Enclosures | Circuit Protection | Pneumatic Cylinders and Actuators
Circuit protection devices protect people, equipment and wiring from overloads, short circuits and faults. Choosing the right device is critical for safety and code compliance.
Circuit Protection Products
- Circuit breakers – miniature and molded case breakers
- Fuses and fuse blocks – fast and time-delay protection
- Disconnect switches – isolate equipment for safe service
- Breaker and disconnect accessories – handles, contacts and trips
- Breaker conversion kits – modernize older equipment
Choosing Protection
Size protection to the load and conductor rating, and confirm interrupting ratings meet available fault current. Follow NEC and UL requirements. Selective coordination helps keep faults isolated.
Centro supplies circuit protection devices from leading electrical brands.
Shop by type: Circuit Breaker Accessories | Disconnect Accessories | Breaker Conversion Kits | Circuit Breakers | Fuses | Fuse Blocks and Holders | Disconnect Switches | Circuit Monitoring
Related categories: Pneumatic and Electronic Controls | Electrical Accessories | PLCs/Smart Relays | Standard Power Supplies | Motor Control
Electrical accessories complete control panels and machines. Push buttons, signal devices, connectors, thermal management and cable systems let operators control equipment and keep panels running reliably.
Accessory Categories
- Push buttons and control lighting – operator controls and indicators
- Sounders – audible alarms
- Connectors – reliable wiring connections
- Thermal management – fans, heaters and air conditioners
- Drag chain guide systems – protect moving cables
- Transformer accessories – fuses and mounting
Choosing Accessories
Match accessories to your panel's voltage, environment and space. Consistent product families simplify spares and maintenance.
Centro supplies electrical accessories for control panels and machine builders.
Shop by type: Push Buttons | Sounders | Drag Chain Guide Systems | Transformer Accessories | Control Lighting | Thermal Management | Connectors | Networking
Related categories: Pneumatic and Electronic Controls | Standard Power Supplies | Circuit Protection | Uninterrupted Power Supplies | PLCs/Smart Relays
Standard power supplies are essential devices that convert incoming electrical energy into a suitable and stable form to power electronic equipment and devices. These power supplies provide a consistent and regulated output voltage or current to ensure reliable operation and protection of electronic components. They are widely used in various applications, including consumer electronics, telecommunications, industrial automation, and computer systems. Standard power supplies come in different form factors, such as wall adapters, desktop units, and rack-mountable models, offering versatility to meet different requirements. Standard power supplies provide a reliable and efficient power source for various electronic devices and systems with features like overvoltage protection, short circuit protection, and high efficiency.
Shop by type: Transformer Accessories | Control Transformers | Power Supplies | Transformers | Standard Power Supplies
Related categories: Pneumatic and Electronic Controls | Uninterrupted Power Supplies | Electrical Accessories | Electrical Control | Circuit Protection
Uninterruptible power supplies (UPS) keep PLCs, HMIs, computers and network equipment running during power outages and protect them from sags and surges. A short outage without UPS protection can cause lost data, scrap and long restarts.
UPS Options
- DIN rail DC UPS – compact backup for control panels
- Line-interactive UPS – economical protection
- Online double-conversion UPS – the highest level of protection
- Industrial UPS – wide temperature and rugged construction
- Replacement batteries – maintain runtime
Sizing a UPS
Add up the load in watts and VA, and decide how much runtime you need. Communication options allow orderly shutdown. Replace batteries every three to five years.
Centro supplies UPS systems and batteries for industrial controls.
Related categories: Pneumatic and Electronic Controls | Electrical Control | Standard Power Supplies | Specialty and Industry Specific Products | Electrical Accessories
HMI (Human-Machine Interface) accessories are additional components and peripherals that enhance the functionality and usability of HMI systems. These accessories are designed to improve user interaction, provide connectivity options, and expand the capabilities of HMI devices. HMI accessories include touchscreen protectors, mounting brackets, communication cables, expansion modules, wireless adapters, stylus pens, and protective cases. These accessories allow for customization, ease of installation, and improved durability of HMI devices. They enhance the user experience, provide flexibility in system integration, and enable seamless connectivity with other devices and networks. HMI accessories play a vital role in optimizing the performance and usability of HMI systems in various industries, including automation, manufacturing, and process control.
Related categories: Pneumatic and Electronic Controls | Valve Systems | Specialty and Industry Specific Products | Electrical Control | Uninterrupted Power Supplies
Valve systems tailored for pneumatics play a crucial role in orchestrating the controlled movement of pneumatic actuators within diverse industrial applications. These systems are designed to manage compressed air flow, enabling precise automation and motion control. By strategically opening, closing, or modulating airflow, pneumatic valve systems determine actuator movements' direction, speed, and force. The components of these systems, including various types of valves and complementary bases, work in tandem to provide seamless functionality. From simple on-off valves to more intricate proportional control valves, selecting the right valve system is essential for optimizing the performance of pneumatic setups. With their ability to enhance accuracy, efficiency, and responsiveness, valve systems for pneumatics contribute significantly to streamlined industrial processes and advanced automation solutions.
Shop by type: Communication and Control Modules | Valves and Bases
Related categories: Pneumatic and Electronic Controls | HMI Accessories | Specialty and Industry Specific Products | Electrical Control | Uninterrupted Power Supplies
Specialty and industry-specific products are built for the unique requirements of marine, rail, oil field and life science applications, along with other specialty items.
Specialty Categories
- Marine products – corrosion-resistant components
- Rail products – rail-certified parts
- Oil field products – rugged, hazardous area equipment
- Life science products – hygienic and lab components
- Specials and non-US products – custom and imported items
Finding the Right Product
Share your application, standards and part numbers, and our team can help you choose the right product.
Centro supplies specialty and industry-specific products.
Shop by type: Marine Products | Life Science Products | Oil Field Products | Specials and Non-US Products | Rail Products
Related categories: Pneumatic and Electronic Controls | Valve Systems | Electrical Control | HMI Accessories | Uninterrupted Power Supplies
Electrical controls switch and signal the operation of motors, lighting and machines. Contactors, relays and indicator lights form the backbone of control panels.
Electrical Control Products
- Control and lighting contactors – switch loads
- General purpose and timing relays – logic and delays
- Miniature contactors and accessories – compact control
- Indicator lights – status and alarm display
- Control accessories – contact blocks and legend plates
Choosing Controls
Match voltage, load ratings and coil voltage. Standardizing on one product family simplifies spares and design.
Centro supplies electrical controls for panel builders and maintenance teams.
Shop by type: Miniature Contactor Accessories | Control Contactors | Control Accessories | Lighting Contactors | Indicator Lights | General Purpose Relays | Timing Relays | Miniature Contactors
Related categories: Pneumatic and Electronic Controls | Specialty and Industry Specific Products | Uninterrupted Power Supplies | Valve Systems | Standard Power Supplies
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- Selecting the right pneumatic cylinder starts with defining the four core parameters of your application. Define four core parameters: bore size (force output = pressure × piston area, plus a 25–50% safety factor), stroke length (match to required travel, avoid excess), mounting style (fixed, flange, or pivot to suit your mechanical arrangement), and environment (standard, washdown, or food-grade seals). Speed is controlled by external flow valves, not cylinder selection. For precise positioning, consider a guided or rodless cylinder with position sensing rather than a standard unit.
- A soft starter ramps voltage at startup to limit inrush current and reduce mechanical shock, then steps aside once the motor reaches full speed. Use one when smooth starting is your only requirement. A VFD controls motor speed continuously throughout operation, making it the right choice whenever the process needs variable speed — conveyors, pumps, fans — and it delivers significant energy savings in centrifugal applications. If you only need a gentle start, use a soft starter. If you need speed control at any point during operation, invest in a VFD.
- PLCs are purpose-built for industrial environments — they tolerate heat, vibration, and electrical noise while executing control logic in deterministic millisecond scan cycles. They replace hardwired relay logic with reprogrammable software, making process changes fast and inexpensive. Built-in diagnostics centralize fault visibility and cut troubleshooting time. Modern PLCs integrate with HMIs, SCADA, and enterprise networks via standard protocols, enabling real-time data collection. Modular architecture means the system scales as the application grows.
- Start with the NEMA or IP rating: NEMA 1 for basic indoor use, NEMA 4/4X for washdown and outdoor exposure (4X adds corrosion resistance), NEMA 7/9 for hazardous classified locations. Size the enclosure with 20–30% spare interior space for future additions and adequate heat dissipation. Choose material based on environment — painted steel for standard indoor use, stainless for washdown or chemical exposure, fiberglass for highly corrosive areas. Verify any required certifications (UL, CSA, ATEX) before specifying.
- Solenoid valves are electrically actuated and can be triggered instantly by a PLC or control system, making them essential for automated, repeatable, or high-cycle applications. Manual directional control valves require a person to physically shift the valve and are appropriate for infrequent operations, manual overrides, or applications with no control system. In practice, most automated systems use solenoid valves for normal operation with a manual override built in for setup, maintenance, and emergency use. If the valve must respond to a signal, cycle repeatedly, or operate unattended, solenoid is the correct choice.