Pneumatic and Electronic Controls - Dwyer

Power supply transformers step line voltage down to the levels needed by control circuits, power supplies and equipment. They also provide isolation for safer, quieter operation.

Transformer Options

• Control transformers – machine control circuits
• Step-down transformers – equipment power
• Isolation transformers – noise reduction
• DIN rail transformers – compact panel mounting
• Fused transformers – built-in protection

Choosing a Transformer

Select primary and secondary voltages and VA rating with margin for inrush. Confirm mounting style and overcurrent protection.

Centro supplies transformers for control panels and power supplies.

Related categories: Standard Power Supplies | Standard Power Supplies | Power Supplies | Control Transformers

We offer linear cylinders, also known as linear actuators or hydraulic/pneumatic cylinders, which are mechanical devices that convert energy into linear motion. They are widely used in various industries, including manufacturing, automation, construction, and transportation. Linear cylinders consist of a piston or plunger that moves back and forth within a cylindrical housing, generating linear force and motion. These cylinders are powered by hydraulic fluid or compressed air, which is supplied to one side of the cylinder to push the piston in one direction, while the other side vents or returns the fluid to complete the cycle. Linear cylinders come in different designs, such as single-acting (one-directional force) and double-acting (bi-directional force). They offer precise control over linear movement, allowing for precise positioning, lifting, pushing, pulling, and clamping applications. Linear cylinders are essential in various industrial processes, such as material handling, machine tooling, assembly lines, and heavy equipment operations. With their robust construction, reliable performance, and versatility, linear cylinders enable efficient and controlled linear motion in various applications.

Related categories: Pneumatic Cylinders and Actuators | Clamps | Rotary Actuators | NFPA Cylinders | Pneumatic Cylinder

Electric linear actuators turn a motor's rotation into precise straight-line motion, using a lead screw or ball screw. They're a clean alternative to pneumatic cylinders when you need accurate positioning, programmable speed or several stop points, and there's no compressor, air line or leak to maintain.

Actuator Types

• Rod-style actuators – push and pull loads much like an air cylinder
• Rodless and slide actuators – carry the load on a carriage for long strokes
• Ball screw actuators – high efficiency, accuracy and duty cycle
• Lead screw actuators – economical and self-locking for holding loads
• Integrated motor and controller units – simple setup with built-in positioning

Sizing Considerations

Define the load, stroke length, speed and required accuracy, along with how often the actuator will cycle. Mounting orientation matters: vertical loads may need a brake or a self-locking screw. Check that the motor and drive are compatible with your controller, whether that's simple I/O, step and direction, or an industrial network.

Centro can help you size an electric actuator and choose the motor, drive and mounting hardware to complete the system.

Related categories: Pneumatic Cylinders and Actuators | Pneumatic Cylinder | Rotary Actuators | Linear Cylinders | Clamps

Electrical accessories cover the many small components that finish control panels and electrical installations, including terminal blocks, wire duct, DIN rail, grommets and mounting hardware.

Accessories Available

• Terminal blocks and jumpers – organized wiring
• Wire duct and DIN rail – panel layout
• Cable glands and grommets – secure cable entry
• Ferrules and lugs – reliable terminations
• Panel hardware – mounting and grounding

Building Better Panels

Quality accessories make panels easier to build, inspect and maintain. Standardize on product families for consistency.

Centro supplies electrical accessories for panel builders.

Related categories: Electrical Accessories | Mechanical Switches | Specialty Conduit Fittings and Hardware | Specialty Conduit | Label Sleeves and Holders

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 | Transformer Accessories | Control Lighting | Connectors | Networking

Related categories: Pneumatic and Electronic Controls | Standard Power Supplies | Circuit Protection | Uninterrupted Power Supplies

Instrumentation refers to devices that measure or control physical variables such as temperature, level, flow, or pressure. These products are essential in the industry because they allow for maximum output with minimum use of raw materials. Flow instruments include flow meters, positive displacement meters, rotameters, flow switches, oval gear meters, and calibration equipment. Analytical instruments measure temperature, pH, conductivity, dissolved oxygen, turbidity, humidity, chlorine, gases, trace oxygen resistivity, and carbon. Pressure instruments include pressure gauges, pressure switches, pressure transmitters, differential pressure gauges, cryogenic gauges, O.E.M. gauges, submersible gauges, digital pressure gauges, and calibration equipment. Level instruments, such as ultrasonic sensors, magnetic float sensors, capacitance sensors, submersible pressure sensors, differential pressure sensors, float valve sensors, float switches, electro-optic sensors, and radar sensors, are used to measure the level of a substance in a container or vessel.

Shop by type: Seals and Accessories | Flow Control | Pressure Control | Controllers | Recorders | Instrument/Compression Fittings | Sensors

Related categories: Actuation and Engineered Products | Process Systems and Process Equipment | Sanitary Equipment | Power Transmission & Application 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: Standard Enclosures

Related categories: Pneumatic and Electronic Controls | Motor Control | Pneumatic Cylinders and Actuators