> Billerica, Massachusetts, October 2006. An essential tool for loop testing, instrument maintenance and valve set-up, the UPS III IS from GE Sensing provides 0.015% accuracy, which is 10 times better than a typical DMM. The rugged, hand-held UPS III IS loop calibrator is an ATEX- and IEC-approved addition to the widely established Druck/Unomat UPS Series of test instruments.