Ring Inductive Proximity Sensor (12mm Hole Diameter)

Ring Inductive Proximity Sensor (12mm Hole Diameter) provides reliable non‑contact detection of metal objects moving through a circular sensing zone. Designed for industrial automation and machine monitoring, this inductive detection unit operates from a wide 6–36V power supply and delivers an NPN normally‑open output for straightforward integration with controllers and monitoring circuits. The ring‑style sensing structure enables accurate detection of screws, nuts, washers, wires, or other small metal components passing through the opening. Fast response, adjustable sensitivity, and durable sealed construction allow this metal detection module to maintain stable operation even in demanding industrial or outdoor environments.

Figure: Ring Inductive Proximity Sensor 12mm

High‑Speed Metal Detection

This inductive ring sensor features a response time under 1ms and a switching frequency of up to 300Hz, enabling reliable detection of fast‑moving metallic objects. The circular sensing zone allows parts to pass directly through the opening, making the sensing module well suited for counting, monitoring, and presence detection in automated assembly lines. Accurate detection performance ensures stable operation even when monitoring small metal components moving at high speed.

Adjustable Sensitivity with Visual Status Indicator

An onboard LED indicator provides clear visual feedback whenever metal enters the sensing area, simplifying installation and troubleshooting. A built‑in sensitivity adjustment knob allows precise tuning of detection behavior according to object size, material, and movement speed. This flexible configuration makes the proximity detection unit suitable for a wide range of industrial sensing tasks where reliable and adjustable metal detection is required.

Rugged Industrial Construction

A brass nickel‑plated flame‑retardant housing provides strong resistance to corrosion, impact, and electrical interference. The sealed enclosure supports IP66 protection, allowing dependable operation in dusty or humid environments. With an operating temperature range of -25℃ to 65℃, this industrial proximity sensing module maintains stable performance in both indoor machinery and outdoor automation systems.

Typical applications include monitoring screws, washers, and nuts during automated assembly, detecting wire breakage in production lines, and identifying jams or missing components in conveyor systems. The ring‑type inductive proximity detector is widely used in machinery automation, metal part counting, safety monitoring, and industrial process control.