Gravity KnowFlow DIY Water Monitoring Basic Kit

DFRobotSKU: RB-Dfr-857
Manufacturer #: KIT0131-1

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Sale price ¥34,203

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  • Gravity KnowFlow DIY Water Monitoring Basic Kit
  • Features an Open-Source Science kit
  • Is designed for environmentalists
  • Monitors water quality and get real time data
  • Stores data on a micro-SD card
  • Is powered by power bank or Li-po battery

The Gravity KnowFlow DIY Water Monitoring Basic Kit is designed for environmentalists who want to monitor water quality and get real time data. It can monitor 2 parameters with basic kit: pH and Electronic conductivities.

The kit is based on Arduino, easy to change and add more sensors and modules. Currently it stores the data on a micro-SD card, also the data can be viewed on your smart phone via Bluetooth communication.

KnowFlow AWM (Automatic Water Monitor) is the first kit for Open-Source Science in KnowFlow team. KnowFlow Kits is using the DFRobot Gravity Sensor series. Gravity Sensor series are easy to use and high compatibility.

If you are not care about the code, you can just upload the sketch into the Bluno board without any coding job. After that you can find that the data is storing into the TF card.

KnowFlow can be powered by power bank or Li-po battery. For the advanced function, you may add ORP sensor, and Dissolve Oxygen sensor in your kit.

  • 1x Bluno (DFR0267)
  • 1x Gravity: Analog pH Sensor / Meter Kit For Arduino (SEN0161-V2)
  • 1x Gravity: Analog Electrical Conductivity Sensor / Meter For Arduino (DFR0300)
  • 1x Gravity: IO Expansion Shield for Arduino V7.1 (DFR0265)
  • 1x Gravity: I2C SD2405 RTC Module (DFR0469)
  • 1x MicroSD card module for Arduino (DFR0229)
  • 1x Gravity: Analog Signal Isolator (DFR0504)
  • 1x SD/MicroSD Memory Card (8 GB Class10 SDHC) (FIT0393)
  • 2x Analog sensor cable
  • 1x Digital sensor cable


  • 60 x 53 mm (2.36 x 2.08 inches)

Bluno Microcontroller:

  • On-board BLE chip: TI CC2540
  • Wireless Programming via BLE
  • Support AT command to config the BLE
  • Transparent communication through Serial
  • Upgrade BLE firmware easily
  • DC Supply: USB Powered or External 7V~12V DC
  • Microcontroller: Atmega328p
  • Bootloader: Arduino Uno (disconnect any BLE device before uploading a new sketch)
  • Compatible with the Arduino Uno pin mapping

pH sensor:

  • Module Power: 5 V
  • Module Size: 43 x 32 mm (1.69 x 1.26 inches)
  • Measuring Range:0 - 14PH
  • Accuracy: ± 0.1pH (25)
  • Response Time: 1 min
  • pH Sensor with BNC Connector
  • pH2.0 Interface (3 foot patch )
  • Gain Adjustment Potentiometer
  • Power Indicator LED

EC sensor:

  • Operating Voltage: +5.00 V
  • PCB Size: 45 x 32 mm (1.77x1.26 inches)
  • Measuring Range: 1ms/cm - 20ms/cm
  • Operating Temperature: 5 - 40 C
  • Accuracy: ±10% F.S (using Arduino 10 bits ADC)
  • PH2.0 Interface (3-pin SMD)
  • Conductivity Electrode (Electrode Constant K = 1,BNC connector)
  • Cable Length of the Electrode: about 60 cm (23.62 inches)
  • Power Indicator
  • Analog Signal Isolator
  • Operating Voltage: 5 V
  • Response Time: 4 seconds (Typ)
  • Analog Error (both ends): ± 20 mV (Typ)
  • Interface Type: PH2.0-3P
  • No load Current: 75 mA
  • Non-isolated Terminal (Arduino Side)
  • Supply Voltage: 5.0 ± 0.1 V
  • Analog Output: 0 ~ 5 V
  • Isolated Terminal (Sensor Side)
  • Output Voltage: 5 ± 0.2 V
  • Analog Input: 0 ~ 5 V
  • Weight: 30 g

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