Overview
The SMC D-C73 reed switch is a reliable proximity sensor engineered for pneumatic cylinder position detection in industrial automation systems. Designed for compact air cylinders, this mechanical reed-type switch detects magnetic fields from magnet-equipped pistons without requiring external power or moving electrical contacts.
Key Features
- LED indicator for status visibility
- Band mounting style for tool-free installation
- IP67 enclosure type for harsh industrial environments
- Dual voltage operation: 5 to 40 mA at 24 VDC, 5 to 20 mA at 100 VAC
- Operates on AC or DC current without configuration changes
- Oil resistant vinyl heavy-duty cord lead wire, 0.5 m length
Technical Specifications
The D-C73 meets industrial durability standards and integrates seamlessly with pneumatic actuators across multiple bore sizes and mounting configurations.
Typical Applications
- Pneumatic cylinder position feedback in factory automation
- Piston stroke detection on compact cylinders
- Motion control systems requiring AC/DC dual-voltage compatibility
- Tight-space installations where band mount is preferred
- Industrial environments with oil mist and moisture exposure
Compatibility & Replacements
Compatible With
- SMC pneumatic cylinders with applicable auto switch mounting—D-C73C/C80C, D-H7C, D-B73C/B80C, D-K79C
- Pneumatic control systems with 24 VDC or 100 VAC logic
- Industrial PLC and relay-based control circuits
- Band mount fixture systems on compact bore cylinders
Replaces / Drop-In Replacement For
- Legacy SMC reed switches in D-C series line
- Generic compact cylinder proximity sensors requiring dual-voltage capability
Works With
- SMC auto-switch mounting bands and brackets
- Pneumatic valve control systems (5/2, 4/2 solenoid valves)
- PLC input modules with 24 VDC or 100 VAC digital inputs
- Contact protection boxes (optional, for high-inductive-load applications)
- Oil-resistant wiring for sealed industrial cabinets
