AKUSENSE TH05-20NE TH Series Ring Type Proximity Sensor for High-Speed Metal Falling Detection

Overview

AKUSENSE ring type metal falling detection sensors adopt inductive sensing technology, designed for high-speed detection and counting of small metal parts falling through the ring hole. Available in multiple inner diameters from 5.5mm to 22.5mm, with knob-type sensitivity adjustment and red LED status indicator, they deliver stable and reliable detection for tiny metal objects down to 0.4mm. Featuring IP67 enclosure rating and built-in multiple protection circuits, they are widely used in automatic feeding, assembly, packaging and fastener production lines. Sample testing, bulk order inquiry and matching technical guidance are all supported.

Key Features

• Ring Type Inductive Sensing — non-contact detection for falling metal parts, no mechanical wear, long service life
• 8 Inner Diameter Options — 5.5mm to 22.5mm available, matching different sizes of metal workpieces
• High Precision Detection — minimum sensing object down to 0.4mm, 2% repeatability for accurate counting
• Knob Sensitivity Adjustment — flexible tuning for different metal materials and detection requirements
• IP67 Enclosure Rating — dust-proof and water-jet resistant, suitable for harsh industrial environments
• Flexible Configuration — NPN / PNP optional, NO/NC switchable, connector or pre-wired cable type
• Red LED Status Indicator — intuitive power and output status display for easy on-site debugging
• Triple Circuit Protection — reverse polarity, short-circuit and surge protection for reliable operation

Technical Specifications

Model Selection Table

*Note: Suffix “E” = M12 4-pin connector type; Suffix “R” = 2m 4-wire pre-wired cable type

Applications

• Automatic feeding system metal parts counting & detection
• Screw, nut and fastener falling presence verification
• Small metal workpiece missing detection in assembly lines
• Electronic component pin and terminal detection
• Spring, steel ball and tiny hardware counting
• Injection molding metal insert confirmation
• Packaging machine metal accessory counting
• Automated production line blanking detection

How to Select

1. Select series by workpiece size
   Choose the inner diameter slightly larger than your metal workpiece; refer to the min. sensing object parameter to ensure detection reliability.
2. Select output type by control system
   – NPN sinking output → choose N suffix models
   – PNP sourcing output → choose P suffix models
   All models support normally open / normally closed switching.
3. Select connection type by installation
   – Quick connection and replacement → M12 connector type (E suffix)
   – Fixed installation, long wiring → 2m pre-wired cable type (R suffix)