Hi there, my first post.
I am an avid beer home brewer, recently I've started to monitor my beer temperatures with the 1wire sensor and now I want to add another dimension to the data by adding a pressure sensor. If you are a home brewer or not, there is a gas blow off tube installed to safely remove the co2 gas from the fermenting chamber - because otherwise it would eventually build up and explode. When yeasts eat sugar, they create co2 gas and alcohol and also create heat as the by product of the reaction.
I want to monitor the heartbeat of the fermentation and the frequency of the hops and correlate the data later with the temperature sensor. I am also capturing date-time.
My question is // what kind of sensor would be good to use here, I want something accurate, but I don't think it has to measure too high because like I said before, there is a blow-off tube employed here, it lets gas out while preventing anything coming into the fermentor (this prevents infection).
Currently for the 1wire I have it hooked up to the Arduno UNO, it sends the signal over the USB cable to the Raspberry Pi and there I pick it over with python script over the serial line. I would like to continue to do the same things here.
Prototype it on the Arduino and send the signal over USB cable (same serial connection) and pick it up with Python on the Pi - I am a better programmer with Python than with C, plus I run the entire web server on the Pi and one of my goals is to also graph the data live into the web site for remote monitoring and also for visitors to see.
I plan to share everything via my blog, once I have the project complete with the code and all.
Let me know what would be best to use for the sensor, it would be placed inside the fermentor, above the beer liquid level, in the headroom of the fermentor - or maybe I could place it inside the blow-off tube, not sure which would be better.