Does anyone have experience with continuous measurements of pH and oxygen in a soil? For this purpose a robust and accurate sensor is needed which is loggable by a Campbell logger and which works reliable under harsh field conditions.
Libelium has a range of sensors with data logging and monitoring capabilities with their own sensors. Good to have a look at these options to suit your requirements.
I am involved in similar measurements but in water for a continuous measurements/logging over a long period of time at a given site. I have my own electronics for that purpose.
Sure the American company Sandia produced a meteriological stataion that has sensors for such measurment in the soil.the good thing is that these sensors are accessable from far distance using datalogger and mobile sim.