DFRobot
DFRobot SEN0710 RS485 Industrial Turbidity Sensor (0-1000 NTU)
· MPN: SEN0710
Designed for industrial water-quality monitoring, this turbidity probe measures suspended particles using the 90° light scattering principle. The probe and h...
Designed for industrial water-quality monitoring, this turbidity probe measures suspended particles using the 90° light scattering principle. The probe and housing are integrated into a compact IP68 unit, so it can be submerged for extended periods in applications such as drinking water treatment, wastewater treatment, river monitoring and lake monitoring.
It communicates over RS485 using the standard ModBus-RTU protocol, making it suitable for data logging and environmental IoT installations. Tutorials are provided for connecting the sensor to Arduino development boards and the DFRobot LoRaWAN Series, with the product wiki available for setup guidance.
The sensor uses an infrared LED light source, a fibre optic light path design and a filtering algorithm to resist external light interference. It is factory calibrated, supports two-point electrode calibration via register settings, and includes built-in temperature sensing for automatic temperature compensation.
The shipping list includes RS485 Water Quality Turbidity Sensor x1 and 5m sensor cable x1.
Features:
- Simple calibration: Simple calibration function, supporting two-point electrode calibration
- Measurement range: 0~1000 NTU
- Resolution: 0.1 NTU
- Accuracy: ±5% FS
- Integrated probe housing: Integrated probe housing design
- Waterproof rating: Waterproof rating up to IP68
- Measurement principle: 90° light scattering principle
- Filtering algorithm: Strong resistance to external light interference
- Built-in temperature sensor: Built-in temperature sensor
- Automatic temperature compensation: Automatic temperature compensation to ensure measurement accuracy
- RS485 communication interface: RS485 communication interface
- ModBus-RTU support: Supporting ModBus-RTU protocol
Specifications:
- Power Supply Voltage: 10~30V DC
- Power Consumption: 0.2W
- Communication Interface: RS485 (Standard ModBus-RTU protocol)
- Measurement Range - Turbidity: 0~1000 NTU
- Measurement Range - Temperature: 0°C~+60°C
- Measurement Accuracy - Turbidity: ±5% FS (25℃)
- Measurement Accuracy - Temperature: ±0.5°C
- Resolution - Turbidity: 0.1 NTU
- Resolution - Temperature: 0.1°C
- Temperature Compensation Range: 0°C~+60°C
- Response Time: ≤30S
- Operating Temperature: 0°C~+40°C
- Measurement Principle: 90° Light Scattering Method
- Waterproof Rating: IP68
- Pressure Resistance: 0.6MPa
- Cable Length: 5m
- Housing Material: Corrosion-resistant plastic
For deployment, maintain a minimum installation clearance of 5cm from surrounding walls and a 7cm obstacle-free zone directly below the probe, avoid active air bubbles, and remove the black rubber protective cover before use. Host polling intervals and wait response times must be set strictly above 200ms; for sustained accuracy, recalibrate every 90 days using deionized water (0 NTU) and a 1000 NTU standard solution.
When interfacing with 5V MCUs such as Arduino UNO via an RS485-to-UART module, use a separate 12V supply for the sensor only if the system cannot provide the required 10~30V DC, and ensure common ground (GND) across the power supply, sensor and MCU.
Jargon buster
Plain-language definitions for the technical terms used above.
- 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.
- LED
- A light-emitting diode is a small electronic component that lights up when current flows through it in the correct direction. In this kit, LEDs create the flashing effect, so polarity and correct soldering matter for the project to work.
- Modbus
- Modbus is an industrial communication protocol used by many meters, sensors, PLCs, and automation devices. Modbus support matters because it can make the controller easier to integrate with existing industrial equipment.
- ModBus-RTU
- ModBus-RTU is a common industrial protocol for sending sensor readings and control commands over serial links such as RS485. Knowing the sensor uses ModBus-RTU helps you choose software libraries, data loggers, or controllers that can request and interpret its readings.
- RS485
- RS485 is a robust wired serial communication standard often used in factories, farms, and buildings where cables may be long or electrically noisy. It matters because it lets this controller connect to industrial sensors, meters, and control equipment over longer distances than typical hobby serial wiring.
- Temperature compensation
- Temperature compensation means the sensor adjusts its readings to reduce errors caused by changes in water temperature. This matters for field monitoring because ponds, rivers, and tanks can vary in temperature throughout the day and across seasons.
- UART
- UART is a simple serial connection that sends data over separate transmit and receive wires, often labelled TX and RX. It matters because this module is designed to replace a wired UART cable with a wireless link while keeping the same serial data format.
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Supplier page — dfrobot.com
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