DFRobot
DFRobot RS485 Industrial Water EC Sensor K=1
· MPN: SEN0706
This industrial-grade water electrical conductivity sensor combines the probe and housing into a single integrated unit for straightforward installation and ...
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This industrial-grade water electrical conductivity sensor combines the probe and housing into a single integrated unit for straightforward installation and reliable measurement. It uses an electrode constant of K=1 and can output conductivity, salinity, TDS and temperature data for multi-parameter water quality monitoring.
Communication is via RS485 using the standard ModBus-RTU protocol, making it suitable for PLCs, industrial gateways, Arduino microcontrollers and DFRobot LoRaWAN projects. DFRobot provides tutorials for connecting the sensor to Arduino development boards and LoRaWAN hardware so you can set up a test environment and monitor data in real time.
A built-in temperature sensor provides automatic temperature compensation, helping maintain accurate readings as conditions change. The sensor is factory calibrated and ready to use, with a 1413μS/cm conductivity calibration solution included for optimising accuracy after prolonged use via register settings.
The package includes the RS485 Water Quality Electrical Conductivity Sensor (K=1) x1, 5m sensor cable x1, 1413μS/cm conductivity calibration solution 100ml x1, black protective mesh x1 and cable ties x2.
Features:
- 4-in-1 Multi-Parameter Output: Built-in algorithms allow you to read Electrical Conductivity (1~2000 μS/cm), Salinity (0~1000 ppm), TDS (0~1100 ppm), and Temperature simultaneously.
- Industrial-Grade Durability: The integrated housing and 5-meter cable boast a true IP68 waterproof rating, perfect for continuous, long-term submersion.
- Automatic Temperature Compensation (ATC): A built-in temperature sensor automatically adjusts readings (-20°C~+60°C range), guaranteeing pinpoint accuracy regardless of environmental fluctuations.
- Effortless IoT Integration: Operates on a wide 10~30V DC power supply and utilizes RS485 (ModBus-RTU), making it plug-and-play ready for PLCs, industrial gateways, and Arduino microcontrollers.
- Out-of-the-Box Ready: Factory calibrated for immediate use. We also include a free 1413μS/cm calibration solution, allowing you to easily optimize accuracy via simple register settings down the road.
Specifications:
- Power Supply Voltage: 10~30V DC
- Power Consumption: 0.4W
- Communication Interface: RS485 (Standard ModBus-RTU protocol)
- Measurement Range - Conductivity: K=1: 1~2000 μS/cm
- Measurement Range - Temperature: -20°C~+60°C
- Measurement Range - Salinity: K=1: 0~1000 ppm
- Measurement Range - TDS: K=1: 0~1100 ppm
- Measurement Accuracy - Conductivity: ±1%FS
- Measurement Accuracy - Temperature: ±0.5°C
- Resolution - Conductivity: 0.1 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
It is well suited to aquaculture, tap water monitoring, drinking water treatment, hydroponics and agricultural irrigation where long-term submerged water quality monitoring is 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.
- 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.
- 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.
- ppm
- ppm means parts per million, a common way to express very small gas concentrations in air. For CO₂ sensors, the ppm range tells you what levels the sensor can measure, such as normal indoor air through to poorly ventilated spaces.
- 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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