Sensors must have a current, accurate calibration at the time of use to provide trustworthy results. Rapid RH® 4.0 EX Smart Sensors are supplied with a calibration certificate to prove traceability to the U.S. National Institute of Standards and Technology (NIST) as specified by ASTM F2170 section 6. Reusable moisture probes must be periodically checked or returned to the manufacturer for re-calibration.
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