Cylinder Magnetic Sensors
Cylinder magnetic sensors (Magnetic Proximity Sensors for Cylinders) are typically used together with cylinder pistons equipped with a magnetic band. An internal permanent magnet is embedded in the piston rod or piston. When the piston moves to the sensor’s position, the magnetic field influences the sensing element (such as a Reed Switch or Hall Sensor) to generate a switching signal. Output is usually binary (ON/OFF), while some advanced models can provide analog signals for position determination.

I. Principle of Cylinder Magnetic Sensors
Internal Structure: A permanent magnet is embedded in the piston rod or piston.
Detection Method: When the piston reaches the sensor’s position, the magnetic field affects the sensing element, producing a switching signal.
Output Characteristics: Typically ON/OFF output; some models offer analog output to determine position.

II. Common Types
1. Reed Switch Type: Low cost and simple structure; disadvantage is lower impact resistance and limited service life.
2. Hall Effect Sensor: No mechanical contact, vibration-resistant, long lifespan, and capable of high-frequency operation.

III. Installation Position
Typically mounted in the sensor slot along the cylinder body, aligned with the piston stroke. The sensor can be positioned at any point along the stroke to detect end position, intermediate position, or home position.

IV. Application Range
1. Position Detection: Confirms whether the piston has reached a designated position (e.g., fully extended or fully retracted) for position confirmation in automated lines.
2. Stroke Control: Works with PLCs or controllers for sequential operations—for example, the next process starts only after the piston reaches the target position.
3. Safety Interlock: Detects whether a workpiece is properly clamped or positioned to prevent malfunctions.
4. Machining Equipment: In CNC fixtures and automated jigs, detects whether clamps or jaws are closed; in packaging and material handling equipment, verifies completion of cylinder motion.
5. Logistics and Handling: Confirms actions in sorting, pushing, or positioning modules.
6. Other Examples: Automotive production lines (clamp or lift platform position detection) and food/pharmaceutical packaging (high-frequency, fast detection applications).