Quote Originally Posted by Fishbones View Post
Very frustrating indeed! I have to either prime the tube every day prior to a measurement or do 3 or 4 sequential measurements in order to get the air bubble out and MAYBE get a correct reading on the 4th measurement. Besides the tremendous waste of reagent, this is not very practical and especially not reliable at all.
we need to become a bit more concrete here now

about what differences from measurement to measurement are we talking here?

how many measurements do you take per day?