Free Web Portal

Access your data from anywhere at anytime via a web browser. No software installation required. View SI values for all measurements. The Plant Sensor 2 Pro measures soil moisture, ambient temperature, sunlight, infrared radiation (IR) and soil temperature. The web portal also allows you to download raw data and to adjust the settings of your sensors.

High-Precision Soil Sensor

Koubachi Wi-Fi Plant Sensor 2 Pro was developed at ETH (Swiss Federal Institute of Technology Zurich). Our patented soil moisture sensor measures water potential (hPa) in all substrates. No calibration required. The matrix potential sensor - similar to a tensiometer - measures the soil moisture tension. It determines the quantity of water that is actually available to the plants' roots regardless of the soil type and soil conditions. Each Plant Sensor 2 Pro leaves our factory checked for extra high quality pre-calibration.


The Koubachi Pro web app gives you the most important statistics. Check total number of sun hours, minimal ambient temperature or the average soil moisture and much more, all on one click.

Sensor Management

With custom sensor descriptions and a single overview, you can organize your sensor as needed. You can also filter the sensor list. Keeping track of even big experiments becomes easy.


Want to use your sensor data in other applications? No problem. You can select a time range and simply download all data. Koubachi Pro supports export to Excel or CSV.

Battery Management

Koubachi Pro shows you the effect of changing measurement or transmission frequency on battery life-time. And to make sure your sensors are always working, you receive an alarm before a battery goes empty.

Our Clients

Technical Specifications

Sensors & Measuring Range

  • Soil moisture: 0 to 10’000 hPA (0 to 100%)
  • Light intensity: 0 to 200'000 lux (300 - 1000 nm)
  • Ambient temperature: -20 °C to +55 °C
  • Soil temperature: -10 °C to +55 °C

Free User Interface

  • Koubachi iPhone App (App Store)
  • Koubachi Android App (Google Play)
  • Koubachi Web-Browser App (
  • Koubachi Web-Browser App (
  • Available in ENG, DEU, JAP


  • Maximal insertion force: 90 N (9 kg)
  • Operating temperature: 0 °C to 50 °C
  • Storage temperature: -10 °C to 60 °C

Wireless Connectivity

  • Wi-Fi: 802.11 b/g @ 2.4 GHz
  • Very low power consumption
  • AP/Ad-hoc mode


  • Device: 56 mm x 76 mm x 177 mm
  • Packaging: 73 mm x 82 mm x 195 mm
  • Weight: 200 g (incl. batteries)


  • RoHS conform
  • Free of lead (Pb), PVC, arsenic and mercury
  • Recyclable packaging


  • Security protocols: WEP, WPA, WPA2
  • AES encrypted server communication

Regulatory statements

  • CE Statement
  • FCC Statement


  • 2x 1.5 V batteries (AA)
  • Average battery lifetime: > 1 year

In the Box

  • Koubachi Wi-Fi Plant Sensor 2 Pro
  • 2x 1.5V batteries (AA)

Get Sensor