The problem ist which led (since 275nm isn´t visible) and photoresistor really work and give finally enough signal. I tried several ones but unfortunately without succes.
The general method for analysis hop bitterness is to extract the beer samples into isooctane and measure the peak height at 275 nm. Now I would like to build an arduino-based analyser. However I do not know what components I have to order. Can somebody help me?