An evaluation of the performance claimed for a chemical time/ temperature integrating device

Abstract
Summary: The manufacturers' claim for the performance and accuracy of a chemical time/ temperature integrator for monitoring the storage history of foods at chilling and ambient temperatures has been tested. the claims for linearity of response and a maximum error of 10% at full scale, are not met. Individual devices of the same type were also unacceptably variable one with another throughout their scale.

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