Average rainfall 2001-2016, global tropics

Map: Average rainfall 2001-2016, global tropics

xspectrolum: Capacitive Soil Moisture Sensor v1.2

Thomas Gumbricht bio photo By Thomas Gumbricht

Introduction

Capacitive soil moisture sensors measures soil moisture levels by capacitive sensing rather than resistive sensing like the more common soil moisture sensors on the market. There are different brands, for instance DFROBOT SKU SEN0 193

To learn about the advantages with capacitive soil moisture sensors, view the Youtube instruction Why most Arduino Soil Moisture Sensors suck (incl. solution), lesson #207 by Andreas Spiess.

Capacitive soil moisture sensor.

The capacitive moisture sensors used in the xspectrolum spectrometer are from pchbutik.