DFRobot

DFRobot Ultra-Compact ToF Laser Ranging Sensor - 7.8m

Name: DFRobot Ultra-Compact ToF Laser Ranging Sensor - 7.8m
Brand: DFRobot
SKU: DF-SEN0646
Price: 36.4 AUD
Availability: InStock

· MPN: SEN0646

Distance & Ranging Sensors Sensors Proximity & Distance DFRobot Sensors & Modules Arduino Sensors Raspberry Pi Sensors

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This ultra-compact dToF laser ranging sensor uses 940nm laser pulses to measure distance up to 7.8 metres with typical ±4cm accuracy. It is designed for prec...

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This ultra-compact dToF laser ranging sensor uses 940nm laser pulses to measure distance up to 7.8 metres with typical ±4cm accuracy. It is designed for precise, real-time ranging in compact robotics, drone, IoT and automation projects.

The module supports UART, I2C and IO communication, making it suitable for use with Raspberry Pi, Arduino and ESP32 platforms. Its narrow 2–3° field of view and 50Hz refresh rate help provide fast, stable readings for obstacle avoidance, navigation, object counting and level detection.

With dimensions of just 19.0×12.0×10.3mm and a sensor weight of 1g, it can fit into space- and payload-sensitive builds such as micro-drones, wearable devices or robotic joints. The package includes 1× ToF laser ranging sensor-7.8m and 2× wiring leads.

Note: The included cable colours are unusual: RED->GND, Black->VCC. Carefully check the power connections before use.

Features:

dToF laser ranging: Uses Direct Time of Flight technology with 940nm laser pulses.
Long-range measurement: Measures up to 7.8 metres.
High-speed updates: 50Hz refresh rate for real-time distance data.
Anti-interference performance: Operates under 100,000 lux ambient light.
Narrow field of view: 2–3° field of view helps reduce background interference.
Multi-protocol support: Compatible with UART, I2C and IO interfaces.
Compact and lightweight: 19.0×12.0×10.3mm module with 1g sensor weight.

Specifications:

Ranging Range: 0.02–7.8m
Accuracy: ±4cm (typical)
Refresh Rate: 50Hz
Ambient Light Resistance: 100,000 lux
Field of View: 2–3°
Power Supply: 4.3–5.2V DC
Communication Interfaces: UART/I2C/IO
Dimensions: 19.0×12.0×10.3mm
Sensor Weight: 1g

Useful applications include drone navigation, robot path planning, smart traffic monitoring, parking status detection, material level detection and production line object counting.

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.
ESP32: ESP32 is a family of low-cost microcontroller chips and modules from Espressif with built-in WiFi and Bluetooth. They support programmable firmware and over-the-air updates, and are commonly programmed with toolchains such as the Arduino core and ESP-IDF.
GND: GND is the ground or reference connection (0 V) for a circuit. When connecting two devices together, their grounds must be joined so both agree on what counts as a low or high signal.
I2C: I2C is a two-wire communication bus used by many sensors and small modules. It matters because several I2C devices can share the same two wires, but each device needs a compatible address and your controller must support I2C.
IoT: Short for Internet of Things, meaning physical devices that connect to networks or the internet to send data or be controlled remotely. It matters if you want projects such as connected sensors, remote controls or classroom data-logging activities.
lux: Lux is the standard unit for measuring how much light falls on a surface, similar to how a light meter reports brightness. A sensor that outputs lux gives readings that are easier to compare between rooms, outdoor conditions, and different projects.
UART: UART is a simple asynchronous serial interface that sends data over separate transmit and receive wires, usually labelled TX and RX, with both ends set to the same baud rate. It is a common way for microcontrollers and other serial devices to exchange data.
VCC: VCC is the positive power-supply connection on a chip or module. Connecting it to the correct supply voltage is needed for the part to power on and helps avoid damaging the electronics.