Intelliscale is a way to describe a percent of reading accuracy statement in an easily understood, abbreviated way. An intelliscale sensor can be in a pressure controller, calibrator, digital pressure gauge or a stand alone transducer. IntelliScale (IS) is a percent (%) of reading (R) specification from the maximum (max) range of the sensor down to a % of the max range and a % of the max range for the balance of the span. For example, if the accuracy of a sensor is designated as 0.01% IS-50, the "0.01%" means that it's accuracy is 0.01% of reading from the max range of the sensor down to 50% of the max range. From 50% of max to the minimum (min) range, the uncertainty is 0.01% of 50% of the max range. For a bidirectional sensor with a span of -15 psi to 300 psi the max range is 300 and the min range is -15. A 0.01% IS-50 specification for this range provides a 0.01% of R accuracy from 300 to 150. From 150 down to -15 the accuracy is 0.01% of 50% of the max range. Definitions: Max = the maximum value of a range, also known as the full scale value. Example, for a range of –15 ... 145, Max = 145 Min = the minimum value of a range. Example, for a range of –15 ... 145, Min = –15 Full span (FS) = Max – Min. Example, for 0 ... 145 the Full Span is 145, for –15 ... 145 the Full Span is 160 Reading = The value of the sensor output IS = IntelliScale is a combination of Max range and Reading