DFRobot Gravity: Lab Grade Analog EC Sensor Kit K=1 for Arduino

wiki information: https://www.dfrobot.com/wiki/index.php/Gravity:_Analog_Electrical_Conductivity_Sensor_/_Meter_V2_(K%3D1)_SKU:DFR0300APPLICATIONSWater quality monitoring.Aquaculture.Hydroponic & Aquaponic.Tips:In order to ensure the measurement accuracy, it is strongly recommended to add a temperature sensor to measure the temperature, and achieve automatic temperature compensation. DS18B20 waterproof temperature sensor can also be used. Attention:1.The probe is a laboratory-grade probe. Do not immerse in liquid for a long time. Otherwise this will shorten the life of the probe.2.Platinum black layer is attached to the surface of the sheet metal in the probe.It should avoid any object touching it. It can only be washed with distilled water, otherwise the platinum black layer will be damaged, resulting in inaccurate measurement.SPECIFICATIONSignal Conversion Board (Transmitter) V2Supply Voltage: 3.0~5.0VOutput Voltage: 0~3.4VProbe Connector: BNCSignal Connector: PH2.0-3PinMeasurement Accuracy: ±5% F.S.Board size: 42mm*32mm/1.65in*1.26inElectrical Conductivity ProbeProbe Type: Laboratory GradeCell Constant: 1.0Support Detection Range: 0~20ms/cmRecommended Detection Range: 1~15ms/cmTemperature Range: 0~40°CProbe Life: >0.5 year (depending on frequency of use)Cable Length: 100cmSHIPPING LISTElectrical Conductivity Probe（K=1,Laboratory Grade） x1Signal Conversion Board (Transmitter) V2 x1Standard Buffer Solution 1413us/cm x2Standard Buffer Solution 12.88ms/cm x2Gravity Analog Sensor Cable x1Waterproof Gasket x2Screw Cap for BNC Connector x1M3 * 10 nylon pillar x4M3 * 5 screw x8

• LAB-GRADE EC MEASUREMENT: Measure electrical conductivity from 0-20mS/cm with a K=1 laboratory-grade probe, ideal for hydroponics, freshwater monitoring, nutrient solution testing, and DIY water projects.
• STABLE AC EXCITATION TECHNOLOGY: Unlike traditional DC-driven sensors, this EC sensor uses AC excitation to reduce electrode polarization, improve measurement stability, and help extend probe service life during repeated testing.
• WIDE VOLTAGE & HARDWARE FILTERING: Supports 3.0–5.0V input for Arduino, ESP32, and other 3.3V/5V controllers. Hardware-filtered analog output minimizes signal jitter for stable, repeatable readings.
• EASY CALIBRATION & INTEGRATION: DFRobot library supports automatic recognition of standard conductivity solutions for two-point calibration, making setup easier for beginners and developers.
• PLUG-AND-PLAY GRAVITY SENSOR KIT: Includes K=1 EC probe, signal conversion board, Gravity cable, calibration solutions, and mounting accessories for hydroponics, aquaculture, STEM education, and environmental monitoring. Not designed for 24/7 continuous immersion.