Sensors

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Multiple sensors are used in the system, the main sensor being the moisture sensor.

Moisture Sensor

Moisture sensors are simple and act on measuring capacitance between 2 points. As the soild dries, the capacitance lowers. So simply put, you have 2 options for the sensor, DIY or commercial:

DIY

  • Gypsum [1]
  • Galvanized Steel [2]

Commercial

  • VG400 [3]
    • $29.99
  • Cheap Hand-held Moisture Sensor; Product: [4] Hack: [5]
    • $10.99