SKU: TH2222
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RS485 Waterproof Ambient Light Sensor (0-200,000 Lux) is a digital light intensity sensor designed for reliable illumination monitoring in demanding indoor and outdoor environments. With a wide 0 to 200,000 lux measurement range, IP68 waterproof protection, and a DC 5-32V supply range, it is suitable for weather stations, greenhouse automation, outdoor lighting control, factory lighting systems, and automotive smart lighting applications.
The sensor communicates over RS485 using Modbus-RTU, making it easy to integrate into industrial controllers, PLC-based systems, data loggers, and microcontroller projects. It supports configurable baud rates, device addressing, and calibration-related registers for flexible deployment in multi-drop RS485 networks.
Its sealed construction and low working current of less than 10mA make it a practical choice where long cable runs, noise resistance, and environmental durability matter. For Arduino-based prototyping, it can be used with an RS485-to-UART converter module to read and log ambient light values.
Key technical details for this ambient light sensor.
| Interface | RS485 |
|---|---|
| Protocol | Modbus-RTU |
| Supply Voltage | DC 5-32V |
| Working Current | <10mA |
| Measurement Range | 0-200,000 Lux |
| Resolution | 0.01 Lux |
| Accuracy | ±5% |
| Working Temperature | -40°C to +80°C |
| Protection Rating | IP68 |
| Thread Length | 10mm |
| Opening Size | 25mm |
| Wrench Size | 33mm |
| Cable Diameter | 4-10mm |
| Cable Length | 1m |
The sensor uses 8-bit binary data, 8 data bits, no parity, 1 stop bit, and CRC error checking. Supported baud rates are 1200, 2400, 4800, 9600, 19200, 38400, and 57600 bit/s, with 9600 bit/s as the default. Factory default device address is 0x01.
Wire functions for power and RS485 communication.
| Wire Color | Name | Function |
|---|---|---|
| Red | VCC | Power input positive, DC 5-32V |
| Blue | GND | Power ground |
| Yellow | 485-A | RS485 data line A |
| Green | 485-B | RS485 data line B |
Do not disassemble the sensor, as it is a precision device. If the reading is zero, verify that a light source is present, the protective cover has been removed, the RS485 A/B lines are not reversed, and the power supply matches the specified input range.
This sensor uses an RS485 output and communicates over the Modbus-RTU protocol. It is designed for integration with controllers or systems that support RS485 communication.
It supports a wide DC 5V to 32V power input and has a working current of less than 10mA. The wiring is Red for VCC, Blue for GND, Yellow for 485-A, and Green for 485-B.
It measures ambient light from 0 to 200,000 lux with a resolution of 0.01 lux and stated accuracy of ±5%. This makes it suitable for monitoring both low-light and bright outdoor conditions within that range.
Yes, it has an IP68 protection rating and is described as suitable for harsh indoor and outdoor environments. Typical use cases mentioned include weather stations, greenhouses, outdoor lighting, factory lighting, and automotive smart lights.
Yes, the reference material includes an Arduino example using a DFRduino UNO R3 or similar board together with an RS485-to-UART adapter module. Since the sensor outputs RS485, a direct TTL serial connection is not what the example shows.
The listed mechanical details are a 10mm thread length, 25mm opening size, and 33mm wrench size. It also specifies support for 4-10mm cable diameter and includes a 1m line length.
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