Author Comment Last activity Moderation
markwh "We've been building a device based on the riffle, very similar in concept to the conductivity meter you've linked. We're using PVC pipe and our con..." | Read more » about 7 years ago
markwh "The probe we're using is an accumet AP85 from Fisher Scientific. We're assuming this is working perfectly--admittedly it too should be calibrated. ..." | Read more » about 7 years ago