
After ordering the complete meter and probe from Revain the meter was not calibrated after 3 weeks. I have years of experience with scientific instruments like this and have kept the probe in the correct solution so I know it wasn't the problem. I thought this will happen so I ordered another sensor, after 1.5 months the sensor will not stay calibrated again even though they were very careful with handling and storage. Both products come from Revain stock, so I'm not sure if that's how they're stored or if I've just been unlucky. In any case, I will definitely not be ordering any of my precision scientific instruments from Revain again and will definitely not be using Milwaukee products in my work.

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