The data graphed above was collected from sensors of a Sense Hat connected to a Raspberry Pi 3. This web page was written on the fly by a Python program, which also collects the sensor data from the Sense Hat. The graphing function is provided by Google Charts.

Atmospheric pressure is commonly provided in units of millibars. However, to provide proper scaling for the above graph, pressure is provided in units of centibars (normal atmospheric pressure at sea level is approximately 100 cbar).

At the start of the run for collecting sensor data, the window to the GEAR lab was opened to cause a fast drop in temperature. Notice also that the relative humidity drops a little with the temperature. That is because the air moving into the lab from outside contains less moisture than the air inside the lab (colder air contains less moisture, all other things being equal). About half-way through data collection, the window was closed to allow temperature in the lab to rise.

If you run the mouse cursor along the graph lines, you will find the data points that are graphed with their values.