cl.20/s3 – magnetic units

Why Choose the Carlo Gavazzi CL.20/S3 Magnetic Unit?

The Carlo Gavazzi CL.20/S3, also identified as CL20S3, is a compact cylindrical magnetic actuator designed for use with compatible Carlo Gavazzi magnetic proximity sensors. As part of the Carlo Gavazzi CL Series magnetic units, it uses a permanent ferrite magnet housed in a durable plastic body to provide dependable non-contact actuation for industrial sensing applications.

The CL.20/S3 is a completely passive magnetic unit and requires no electrical power supply, wiring or signal connection. When positioned within the operating range of a compatible magnetic sensor, its permanent magnetic field actuates the sensing element. This simple contactless principle makes the unit suitable for repetitive position, movement and presence detection where mechanical contact between the actuator and sensor is undesirable.

Featuring a compact 22.1 mm diameter cylindrical body with an approximately 10.5 mm magnetic body height, the CL.20/S3 provides a space-efficient actuator for industrial machinery and automation equipment. Its 4.8 mm mounting connection, ferrite magnetic material and plastic housing support straightforward mechanical installation alongside compatible Carlo Gavazzi magnetic sensors.

Key Advantages

• Compact permanent magnetic actuator for industrial magnetic sensors.
• Designed for use with compatible Carlo Gavazzi magnetic proximity sensors.
• Passive operation requires no electrical power supply or wiring.
• Ferrite magnetic material provides durable permanent-magnet actuation.
• Protective plastic housing around the magnetic assembly.
• Compact 22.1 mm diameter cylindrical format for space-restricted installations.
• 4.8 mm mounting connection for straightforward mechanical installation.
• Suitable for reliable non-contact position, movement and presence detection.

Key Features

• Carlo Gavazzi CL Series magnetic unit.
• CL.20/S3 / CL20S3 model designation.
• Permanent ferrite magnet.
• Plastic housing.
• Cylindrical smooth-barrel construction.
• 22.1 mm diameter.
• 10.5 mm magnetic body height.
• 4.8 mm mounting connection.
• North and south magnetic pole identification.
• No external electrical supply required.
• No electrical output or cable connection required.
• Designed to actuate compatible magnetic sensors without mechanical contact.
• Suitable for industrial position, movement and presence detection.

Reliable Non-Contact Magnetic Actuation

Magnetic proximity sensing systems use a permanent magnet and a separate sensing element to detect position without requiring physical contact between the two components. When the CL.20/S3 enters the operating range of a compatible magnetic sensor, its magnetic field causes the sensor to change switching state. Moving the magnetic actuator away allows the sensor to return to its normal state according to the characteristics of the selected sensing device.

This contactless operating principle helps minimise mechanical wear and is well suited to applications involving repeated movement. The compact CL.20/S3 can be attached to a moving machine component, door, guard, carriage or other target, while the associated magnetic sensor remains fixed. Its permanent ferrite magnet requires no electrical supply and provides a simple solution for industrial position and presence detection.

Typical Applications

• Actuation of industrial magnetic proximity sensors.
• Machine position detection.
• Door and access position monitoring.
• Industrial automation equipment.
• Moving component detection.
• End-position sensing.
• Material handling machinery.
• Packaging and production equipment.
• Conveyor and handling systems.
• Non-contact presence and position detection.