DFRobot
Gravity: Arduino EC (Electrical Conductivity) Sensor / Meter
The Gravity EC (Electrical Conductivity) Sensor measures the conductivity of aqueous solutions, providing an analogue output for Arduino and compatible micro...
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The Gravity EC (Electrical Conductivity) Sensor measures the conductivity of aqueous solutions, providing an analogue output for Arduino and compatible microcontrollers. EC measurement is essential for monitoring water quality, nutrient levels in hydroponic systems, and soil salinity in agricultural applications.
The kit includes a conductivity electrode (K=1), a waterproof DS18B20 temperature sensor for temperature compensation, and calibration standard solutions. The Gravity 3-pin interface allows plug-and-play connection without soldering.
Key Features
- Analogue EC Measurement – 1–20 mS/cm range for water quality monitoring
- Gravity Interface – 3-pin PH2.0 connector for plug-and-play Arduino connection
- Temperature Compensation – Included waterproof DS18B20 sensor for accurate readings
- BNC Electrode – Conductivity probe with K=1 constant and ~60 cm cable
- Calibration Solutions Included – 1413 µS/cm and 12.88 mS/cm standards
Specifications
- Operating Voltage – 5.00 V
- Measuring Range – 1–20 mS/cm
- Accuracy – <±10% F.S. (using Arduino 10-bit ADC)
- Operating Temperature – 5–40 °C
- Electrode Constant – K=1 (BNC connector)
- Electrode Cable Length – ~60 cm
- PCB Size – 45 × 32 mm
Package Contents
- 1× Conductivity electrode (BNC connector)
- 1× EC meter circuit board
- 1× Analogue cable
- 1× DS18B20 temperature sensor (waterproof)
- 1× Terminal sensor adapter
- 1× Digital cable
- 1× Conductivity standard solution (1413 µS/cm and 12.88 mS/cm)
Ideal For
- Hydroponic and aquaponic nutrient monitoring
- Aquaculture water quality testing
- Irrigation and soil salinity assessment
- General water quality monitoring
Resources
Jargon buster
Plain-language definitions for the technical terms used above.
- ADC
- An analogue-to-digital converter reads a changing voltage and turns it into a number the microcontroller can use. It matters when connecting analogue sensors such as light, sound, or variable-resistor sensors.
- BNC connector
- A twist-lock connector commonly used for probes, test equipment, and shielded signal cables. For pH and conductivity sensors, a BNC connector makes it easier to attach or replace electrodes without soldering.
- DS18B20
- The DS18B20 is a common digital temperature sensor, often supplied in a waterproof stainless-steel probe, that sends its readings to a microcontroller over a 1-Wire connection. It is a typical choice for adding temperature data to environmental or water-monitoring projects.
- Gravity
- Gravity is DFRobot’s plug-in connector system for sensors, motors and modules, using standard cables to reduce loose jumper wiring. It matters because Gravity-compatible parts can connect directly to these ports, while non-Gravity parts may need adapters or manual wiring.
- PCB
- A printed circuit board (PCB) is a board, usually rigid, with etched copper tracks that connect electronic components together without loose wiring. Components are mounted on the board and signals route between them through the copper layout.
- 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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Brands
Sensors & Input
Supplier page — dfrobot.com
Supplier Description · 507.7 KB · Click any page to view full size
DFR0300 analog conductivity sensor k1 layout V1.0
Document · 116.3 KB · Click any page to view full size
Resources & Downloads
Guides, code examples, and more
Related Tutorials
Free guides on learn.littlebird.com.au
