By definition, Measurement Accuracy is the degree to which a measurement conforms to the actual torque value. Using the maker's specification to predict measurement accuracy is only valid when the test conditions and the calibration conditions are identical. If they are not, field results will fall short of published Cal Laboratory performance.
Himmelstein Torque Sensors undergo NVLAP Accredited (Lab Code 200487-1) Calibration conforming to ISO/IEC 17025:2005. Here are some of the conditions that exist during calibration.