The most responsive setup i made with a probe was inside a light bulb, its was
one of the clear candle bulbs, see image, the response was brilliant, see graph
image, link at bottom, sadly the setup i have now is not as good but this is becasue
i have the solar combined with the night cloud sensor, i had to have a compromise 
Please see this thread, theres some images of the setup and towards the end of
the thread are some of the graphs showing the responsiveness of the candle bulb…