Here we show you some data from Sable Systems humidity analyzers. The first example is perhaps the most extreme - the resolution of a single ant breathing, in a flow-through system using completely dry air. Note that the RH-300's noise level is well under 1 Pa of water vapor pressure peak-to-peak.

For some years, we have challenged other manufacturers of humidity analyzers to equal or better this trace. Needless to say, they have not risen to the challenge.

Next, we look at cutaneous water loss. Using a cup sensor and a flow-through system based on the SS-3 subsampler, here is what we found:

Note that the forehead trace shows the dynamics of sweat production, visible as small up-and-down spikes on the trace as droplets of sweat are produced and evaporate.

The RH-300 is capable of excellent quantitative determination of water vapor density in flow-through systems, making characterization of evaporation from any surface really straightforward, as in this next example:

Note that different substrates affect evaporation kinetics. The above example used a glass mirror as the substrate; using a polished granite surface resulted in greatly slowed end-points, reflecting the granite's far greater porosity.

And last but not least, the Sable Systems RH-300 water vapor analyzer has such high resolution that it can easily and accurately measure the water loss rate of a single fruit fly (Drosophila melanogaster) - click here for details.