Does the Rapid RH® Reader ever need calibration?

You must use a properly calibrated RH sensor to ensure accurate RH test results. But what about the Rapid RH® Reader itself? Does it ever need calibration? Watch as Jason explains exactly how the Rapid RH® Reader works and what you need to know when using it. The Rapid RH® 4.0 has been replaced with the Rapid RH® L6.