DFRobot
Digital IR Proximity Sensor (1-400cm)
The Digital IR Proximity Sensor detects objects at distances from 1 to 400 cm using a 940 nm laser emitter. It's the advanced version of the SEN0381, offerin...
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The Digital IR Proximity Sensor detects objects at distances from 1 to 400 cm using a 940 nm laser emitter. It's the advanced version of the SEN0381, offering a longer sensing range and an onboard status indicator LED.
Detection distance is adjustable — hold the onboard button for 3 seconds, then set your desired range. The sensor automatically saves the configured distance. Digital signal output makes it easy to integrate with Arduino and DFRobot IO Expansion Shields.
Key Features
- Adjustable Range – Set detection distance from 1 to 400 cm via onboard button
- Laser Sensing – 940 nm laser with diffuse reflection detection
- IP67 Waterproof – Suitable for outdoor and harsh environments
- Digital Output – High/low level signal, compatible with Arduino
- Short Circuit Protection – Automatically disables output above 1 A
- Wide Voltage Range – 5–24 V DC power supply
Specifications
- Power Supply – DC 5–24 V
- Operating Current – 15 mA
- Load Current – 300 mA
- Detection Distance – Adjustable, 1–400 cm
- Detection Accuracy – ±4%
- Wavelength – 940 nm laser emitter
- Detection Angle – 35° (transmit), 25° (receive)
- Operating Temperature – −20 to 70 °C
- Storage Temperature – −20 to 85 °C
- Waterproof Rating – IP67
- Material – PC optical filter, PC-V0 fireproof housing
Ideal For
- Robot obstacle avoidance
- Smart home automation
- Security and intrusion detection
- Proximity-triggered control systems
Package Contents
- 1× Digital Laser Proximity Sensor (1–400 cm)
Resources
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.
- IP67
- An ingress protection rating meaning the enclosure is dust-tight and can survive temporary immersion in water under specified test conditions. This matters when choosing a sensor for outdoor, wet, or wash-down environments.
- 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.
- Short circuit protection
- A safety feature that helps protect the device if its output or wiring is accidentally connected in a way that causes excessive current flow. This matters in automation wiring because mistakes or damaged cables can otherwise destroy the sensor or power supply.
- Torque
- A twisting force that causes something to rotate, usually measured in newton-metres or kilogram-centimetres. It matters when choosing motors, servos, gears, and tools because higher torque is needed to lift heavier loads, turn larger wheels, or move mechanisms without stalling.
- wavelength
- The distance between repeating peaks of a wave, often used to describe the colour of light in nanometres. For visible lasers and LEDs, wavelength tells you the approximate colour, such as red, green or blue.
Find this product in
Sensors & Input
Digital IR Proximity Sensor CE Certificate
Compliance · 715.4 KB · Click any page to view full size
Digital IR Proximity Sensor RoHS Certificate
Compliance · 720.1 KB · Click any page to view full size
Supplier page — dfrobot.com
Supplier Description · 545.0 KB · Click any page to view full size
Related Tutorials
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