DFRobot
Ring Inductive Proximity Sensor (22mm Hole Diameter)
This inductive ring proximity sensor detects metal objects as they enter or pass through a 22 mm ring opening. Operating on a 6–36 V supply with NPN normally...
This inductive ring proximity sensor detects metal objects as they enter or pass through a 22 mm ring opening. Operating on a 6–36 V supply with NPN normally-open output, it delivers a sub-1 ms response time — fast enough to reliably detect small, fast-moving metal parts.
The sensor features an onboard LED that lights up when a metal object is detected, plus an adjustable sensitivity knob for fine-tuning. Its brass nickel-plated, flame-retardant housing is sealed to IP66, making it suitable for both indoor and outdoor use in temperatures from −25 °C to 65 °C.
Key Features
- 22 mm Ring Opening – Detects metal objects passing through the ring
- Fast Response – Less than 1 ms switching time at up to 300 Hz
- Wide Voltage Range – 6–36 V DC input
- NPN Normally-Open Output – Up to 300 mA current capacity
- 10 mm Detection Distance – Reliable sensing range for metal objects
- Adjustable Sensitivity – Onboard knob (clockwise to increase)
- LED Status Indicator – Visual confirmation of detection
- IP66 Rated – Dust-tight and protected against powerful water jets
- Rugged Construction – Brass nickel-plated, flame-retardant housing
- 2 m Wire Lead – Pre-wired for easy installation
Specifications
- Supply Voltage: 6–36 V DC
- Output Type: NPN (normally-open), high/low level signal
- Max Current: 300 mA
- Hole Diameter: 22 mm
- Detection Distance: 10 mm
- Switch Frequency: 300 Hz
- Operating Temperature: −25 °C to 65 °C
- Operating Humidity: 35–95% RH
- Dimensions: 68 × 39 × 20 mm
Ideal For
- Counting or detecting small metal parts (screws, washers, nuts)
- Monitoring wire breakages and jams
- Industrial automation and conveyor systems
- Quality control on production lines
Package Contents
- 1× Ring Inductive Proximity Sensor (22 mm Hole Diameter)
Jargon buster
Plain-language definitions for the technical terms used above.
- LED
- A light-emitting diode is a small electronic component that lights up when current flows through it in the correct direction. In this kit, LEDs create the flashing effect, so polarity and correct soldering matter for the project to work.
- Proximity sensor
- A sensor that detects when an object is nearby without needing physical contact. For this product it matters because the useful detection range is short, up to about 200 mm, so it suits touch-free triggers and close object detection rather than long-distance measuring.
Find this product in
Sensors & Input
Supplier page — dfrobot.com
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