DFRobot
RS485 Industrial Water Conductivity Sensor K=10
· MPN: SEN0707
This industrial-grade water electrical conductivity sensor combines the probe and housing in one integrated unit for straightforward installation and reliabl...
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This industrial-grade water electrical conductivity sensor combines the probe and housing in one integrated unit for straightforward installation and reliable EC measurement. With an electrode constant of K=10, it is suited to higher-conductivity water monitoring across aquaculture, tap water, drinking water treatment, hydroponics and agricultural irrigation.
The sensor can output conductivity, salinity and TDS data, with a built-in temperature sensor providing automatic temperature compensation. It uses an RS485 interface with standard ModBus-RTU protocol, making it suitable for industrial monitoring systems and maker data-logging projects.
DFRobot provides tutorials for connecting the sensor to Arduino development boards and DFRobot LoRaWAN for quick test setup and real-time monitoring. It is factory calibrated for immediate use, and the package includes the RS485 Water Quality Electrical Conductivity Sensor (K=10) x1, 5m sensor cable x1, 12880μS/cm conductivity calibration solution 100ml x1, black protective mesh x1 and cable ties x2.
Features:
- Simple calibration: Simple calibration function
- Electrode calibration: Supports electrode calibration
- Measurement range: 10~20000 μS/cm
- Resolution: 1 μS/cm
- Accuracy: ±1% FS
- Salinity conversion: Features salinity conversion function, capable of outputting salinity data
- TDS conversion: Features TDS conversion function, capable of outputting TDS data
- Integrated design: Integrated probe housing design
- Waterproof rating: Waterproof rating up to IP68
- Built-in temperature sensor: Automatic temperature compensation to ensure measurement accuracy
- RS485 communication: RS485 communication interface
- ModBus-RTU: Supports ModBus-RTU protocol
Specifications:
- Power Supply Voltage: 10~30V DC
- Power Consumption: 0.4W
- Communication Interface: RS485 (Standard ModBus-RTU protocol)
- Measurement Range - Conductivity: K=10: 10~20000 μS/cm
- Measurement Range - Temperature: -20°C~+60°C
- Measurement Range - Salinity: K=10: 0~11476ppm
- Measurement Range - TDS: K=10: 0~13400ppm
- Measurement Accuracy - Conductivity: ±1%FS
- Measurement Accuracy - Temperature: ±0.5°C
- Resolution - Conductivity: 1 μS/cm
- Resolution - Temperature: 0.1°C
- Temperature Compensation Range: -20°C~+60°C
- Temperature Compensation Coefficient: Default 0.02
- Response Time: ＜1S
- Operating Temperature: -20°C~+80°C
- Waterproof Rating: IP68
- Pressure Resistance: 0.6MPa
- Cable Length: 5m
- Housing Material: Corrosion-resistant plastic
A practical choice for water quality monitoring where long-term submersion, RS485 networking and multi-parameter EC/TDS/salinity output are required.
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.
- Modbus
- Modbus is an industrial communication protocol used by many meters, sensors, PLCs and automation devices. When a product lists Modbus support, it is generally easier to integrate with existing industrial equipment that speaks the same protocol.
- ModBus-RTU
- ModBus-RTU is a common industrial protocol for sending readings and control commands over serial links such as RS485. Knowing a device uses ModBus-RTU helps you choose software libraries, data loggers, or controllers that can request and interpret its data.
- RS485
- RS485 is a robust differential serial communication standard often used in factories, farms and buildings where cables may be long or electrically noisy, and it can link many devices on a single pair of wires. When a product lists RS485, it can communicate with industrial sensors, meters and control equipment over longer distances than typical hobby serial wiring.
- Temperature compensation
- Temperature compensation is when a sensor or instrument adjusts its readings to reduce errors caused by changes in temperature. This matters because a sensor's raw output often drifts as conditions warm or cool, so compensation keeps readings more consistent and accurate over time.
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