Real-Time Indoor Environment Monitor

The real-time indoor environment monitor is presented in line chart format.
The user can choose timescale and resolution for their real-time monitoring. They can also choose which indoor environment parameter to monitor.
Timescale represents the length of time along the x-axis of the chart.
Resolution represents the increments along the graph, and also the rate of updates.

Timescale ranges from ¼ hour to 2 hours in ¼ hour increments
Resolution ranges from 1 second to 1 minute in 15-second intervals.

The environmental factors that can be chosen to monitor are: CO, CO2, Radon, Natural Gas, Humidity, and Temperature.

The y-axis range is chosen according to the general background levels of pollutants and the threshold for pollutants becoming dangerous. E.g. CO becomes dangerous at 6ppm so the y-axis range will be 0ppm -10ppm in 1ppm increments.

The average concentration of the indoor pollutant in the house is displayed in ppm, relative humidity in per cent, and temperature in degrees C.