Abstract:
To monitor the acidity of rain water in real time, a rain water sampling system was
developed. The rain sampler detects the initial rain after a dry spell and collects a water
sample. Before performing the measurements, the pH probe is calibrated using a standard
buffer solution whereas the conductivity probe is calibrated using deionized water. After
calibrating the probes the pH and the conductivity of the collected rain water sample are
measured using the pH and the conductivity probe. Weather parameters such as air
temperature, humidity and pressure are also recorded simultaneously. The pH and
conductivity measurement data including weather parameters are transmitted to central
station using a GSM modem for further analysis. The collected rain water sample is
preserved at the remote monitoring station for post chemical analysis. A programmable
logic controller controls the entire process.
