# RS485 Waterproof Ambient Light Sensor (0-200,000 Lux)

**Type:** Product page · **SKU:** SEN0644 · **Brand:** [DFRobot](https://core-electronics.com.au/brands/dfrobot-australia)
**Page:** https://core-electronics.com.au/rs485-waterproof-ambient-light-sensor-200000-lux-modbus-rtu-ip68.html ([markdown](https://core-electronics.com.au/rs485-waterproof-ambient-light-sensor-200000-lux-modbus-rtu-ip68.html.md))

The waterproof digital IP68 waterproof light sensor with 0-200k lux range and Modbus-RTU 485. For industrial, automotive, outdoor lighting measurement...

## Pricing

- **Price:** $20.90 (inc GST) — $19.00 AUD, exc GST
- **Quantity discounts:** 6+ $18.05 (exc GST) · 12+ $17.29 (exc GST)

## Availability & dispatch

- Available with a lead time — expect dispatch between Aug 31 and Sep 03.

## Description

The Waterproof Digital Ambient Light Sensor is a robust and versatile device designed to measure light intensity across a wide range of environments, from **0 to 200,000 Lux**. Utilizing the Modbus-RTU 485 communication protocol and powered by a DC 5-32V wide voltage supply, it ensures seamless integration with systems like the [Arduino](https://www.dfrobot.com/topic-277.html) via compatible expansion boards.

With an IP68 waterproof rating, the sensor can withstand complete submersion, making it ideal for both indoor and outdoor applications, including weather stations, greenhouses, outdoor lighting, and automotive smart lights. Its high accuracy (±5%), broad measurement range, and durable construction make it a reliable solution for demanding environments.

**IP68 Waterproof Design**

The sensor is fully waterproof, meeting the IP68 standard, and can be submerged in water without damage. This makes it suitable for use in harsh outdoor environments, such as weather stations, greenhouses, and automotive applications, ensuring consistent performance in wet or humid conditions.

**Wide Range and High Accuracy**

With a measurement range of 0-200,000 Lux and a resolution of 0.01 Lux, the sensor provides precise light intensity readings across diverse scenarios, from dim indoor settings to bright outdoor environments. Its ±5% accuracy ensures reliable data for critical applications like plant growth monitoring and lighting control.

**Easy Integration and Compatibility**

The sensor supports the Modbus-RTU 485 protocol and can be easily connected to Arduino and other microcontroller platforms using expansion boards like the [TTL to RS485 module](https://www.dfrobot.com/product-1024.html) or the [Gravity: Active Isolated RS485 to UART Signal Adapter](https://www.dfrobot.com/product-2392.html). Its simple wiring and wide voltage power supply (DC 5-32V) make it user-friendly and adaptable to various setups.

### Specification

10. Power supply voltage: DC 5-32V
11. Working current: <10mA
12. Output mode: RS485
13. Measurement range: 0-200,000 Lux
14. Resolution: 0.01 Lux
15. Accuracy: ±5%
16. Working temperature: -40°C~+80°C
17. Protection level: IP68
18. Thread length: 10mm
19. Opening size: 25mm
20. Wrench size: 33mm
21. Cable diameter: 4-10mm
22. Line length: 1m
### Documents

24. [Product wiki](https://wiki.dfrobot.com/SKU_SEN0644_RS485_Waterproof_Ambient_Light_Sensor_0_200klux)
25. [Dimensional Drawing](https://wiki.dfrobot.com/SKU_SEN0644_RS485_Waterproof_Ambient_Light_Sensor_0_200klux#target_5)
26. [Communication Protocol](https://wiki.dfrobot.com/SKU_SEN0644_RS485_Waterproof_Ambient_Light_Sensor_0_200klux#target_6)
27. [Tutorial](https://wiki.dfrobot.com/SKU_SEN0644_RS485_Waterproof_Ambient_Light_Sensor_0_200klux#target_7)
28. [FAQ](https://wiki.dfrobot.com/SKU_SEN0644_RS485_Waterproof_Ambient_Light_Sensor_0_200klux#target_8)

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/S/E/SEN0644-1.jpg)