Test gauges deliver certified accuracy at ±.25% full scale (Grade 3A)*, feature a knife-edged pointer for precision readings, and come with a calibration certificate traceable to the National Institute of Standards and Technology (NIST) included in the price.
Process gauges feature bold lettering and an easy read pointer. They are available in ±.5% full scale (Grade 2A)* or ±.5% mid-scale/ ±1% full scale* accuracy. They can be purchased with a calibration certificate for additional cost. Process gauges are also available in a larger number of ranges.
All Perma-Cal® gauges have a high repeatable accuracy and instantaneous action. The full scale accuracy rating is applicable in both ascending and descending modes on all gauges except for gauges rated above 5,000 PSI*. Gauges in this pressure range offer descending accuracy of ±1% full scale.
* All accuracy options are not available in all ranges, i.e. ranges above 5.000 psi are ±1% full scale descending accuracy. For further details on ascending and descending accuracy see bulletin.