> **Source:** Core Electronics is an Australian maker-electronics retailer and manufacturer based in Newcastle, NSW, run by a team of makers and educators. We design and manufacture our own product lines (PiicoDev, CE originals) and are official retailers for iconic maker and industrial brands including Raspberry Pi, Arduino, Adafruit, SparkFun and DFRobot. Orders ship Australia-wide from our Newcastle warehouse. Prices are in AUD and include GST. Pricing, stock and dispatch on this page are generated from the store's live catalog. Full machine-readable index: https://core-electronics.com.au/llms.txt

# Ultra-Compact ToF Laser Ranging Sensor (7.8m, 1 gram)

**Type:** Product page · **SKU:** SEN0646 · **Brand:** [DFRobot](https://core-electronics.com.au/brands/dfrobot-australia)
**Page:** https://core-electronics.com.au/dfrobot-ultra-compact-tof-laser-rangefinder-7-8m-sensor.html ([markdown](https://core-electronics.com.au/dfrobot-ultra-compact-tof-laser-rangefinder-7-8m-sensor.html.md))

Ultra-compact ToF laser ranging sensor (19×12×10.3mm,1g) with 7.8m range & ±4cm accuracy. 50Hz refresh rate, 100,000 lux ambient light resistance. For...

## Pricing

- **Price:** $26.85 (inc GST) — $24.41 AUD, exc GST

## Availability & dispatch

- Available with a lead time — expect dispatch between Aug 26 and Aug 31.

## How to buy

- **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=SEN0646:1` (comma-separated SKU:qty pairs) and share the link. Opening it shows a confirmation page with live pricing and stock before anything is added to the cart.
- **Verify the cart first:** fetch `https://core-electronics.com.au/cart/link/SEN0646:1.md` for live line prices (inc & exc GST, quantity discounts applied), stock and dispatch estimates, and totals. Append `/to/{AU-postcode}` (or `/to/{country-code}:{postcode}`) before `.md` for delivery options and prices to that destination. Unknown, retired, or out-of-stock SKUs are flagged. (Query form `cart/link.md?items=...` also works but some robots parsers refuse query strings here.)
- **Checkout** is completed on-site and includes a captcha at the payment step. Share the cart link; checkout takes it from there.
- **Search the catalogue:** `https://core-electronics.com.au/search/{query}.md` (URL-encode the query; pages 2-3 at `search/{query}/{page}.md`; `search.md?q=` also works)
- **Payment methods, purchase orders, policies and contact details:** https://core-electronics.com.au/llms.txt
## Description

The ToF Laser Ranging Sensor leverages dToF (Direct Time of Flight) technology with 940nm laser pulses to deliver precise distance measurements up to 7.8 meters (±4cm accuracy), even in high-interference environments (ambient light resistance: 100,000 lux). Compatible with [Raspberry Pi](https://core-electronics.com.au/raspberry-pi.html), [Arduino](https://core-electronics.com.au/arduino.html), and [ESP32](https://core-electronics.com.au/development-boards/esp32.html) via UART/I2C interfaces, its **ultra-compact design (19×12×10.3mm, 1 gram)** and multi-protocol support make it ideal for robot and drone obstacle avoidance and navigation, robotics, [IoT](https://www.dfrobot.com/topic-276.html), and industrial automation.

**Ultra-Lightweight & Miniaturized Design**

Weighing 1g with dimensions of 19×12×10.3mm, the sensor is one of the smallest and lightest dToF solutions on the market. Its 19mm³ footprint allows direct integration into micro-drones, wearable devices, or robotic joints without compromising payload capacity or mobility. The design eliminates traditional bulky optics, enabling deployment in space-critical applications like micro-drone obstacle avoidance or smartwatch gesture control.

Figure: Lightweight and Coin-Sized ToF Laser Ranging Sensor

**High-Speed Dynamic Ranging**

With a 50Hz refresh rate, the sensor delivers real-time distance updates, critical for applications requiring rapid response, such as drone obstacle avoidance or industrial conveyor belt monitoring. The narrow 2-3° field of view minimizes interference from ambient light and background noise, ensuring stable performance in both indoor and outdoor settings.

**Robust Anti-Interference Capability**

The sensor operates reliably under 100,000 lux ambient light (equivalent to direct sunlight), making it suitable for outdoor traffic monitoring or construction sites. Advanced algorithms filter out environmental noise, enabling consistent accuracy in dynamic scenarios like vehicle speed detection or material level measurement.

### Specification

- 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
 
### Documents

- [Product wiki](https://wiki.dfrobot.com/SKU_SEN0646_TOF_laser_ranging_sensor_7.8m)
- [Dimensions](https://wiki.dfrobot.com/SKU_SEN0646_TOF_laser_ranging_sensor_7.8m#target_3)
- [Tutorial](https://wiki.dfrobot.com/SKU_SEN0646_TOF_laser_ranging_sensor_7.8m#target_4)
- [FAQ](https://wiki.dfrobot.com/SKU_SEN0646_TOF_laser_ranging_sensor_7.8m#target_9)

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/S/E/SEN0646-1.jpg)