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...
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
- A common digital temperature sensor often sold in waterproof probe form. It matters here because the kit does not include temperature measurement, and a DS18B20 is the suggested add-on if your water readings need temperature context.
- 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 is a rigid board with copper tracks that connect electronic parts without loose wires. For this kit, the PCBs also form the airplane shape, so they are both the circuit base and part of the finished model.
- 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.
Find this product in
Brands
Sensors & Input
Supplier page — dfrobot.com
Supplier Description · 507.7 KB · Click any page to view full size
Related Tutorials
Free guides on learn.littlebird.com.au
