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...
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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.
- DC
- DC means direct current, where electricity flows in one constant direction, as supplied by batteries, USB ports and many plug-pack power supplies. When a product specifies DC, it runs from a DC supply rather than mains AC, so you need to provide the correct voltage and polarity.
- LED
- A light-emitting diode (LED) is a small electronic component that emits light when current flows through it in the correct direction. Because it only conducts one way, its polarity matters, and a through-hole LED must be soldered the correct way around to light up.
- Proximity sensor
- A sensor that detects the presence of a nearby object without physical contact, using methods such as infrared, ultrasonic, capacitive, inductive or time-of-flight. Useful ranges vary widely between types, from a few millimetres to several metres, so check a given sensor's specified range to see whether it suits close-up touch-free triggers or longer-distance detection.
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Sensors & Input
Supplier page — dfrobot.com
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