Featuring dual isolated pressure sensors with 0.025% accuracy, Fluke® 721Ex Intrinsically Safe Precision Pressure Calibrator is rated IECEx and Atex Ex ia IIB T3 Gb (Zone 1), enabling simultaneous static and differential pressure measurements in hazardous environments. Unit is configured by selecting 16 psi or 36 psi low pressure sensor then adding any of 7 high pressure ranges. Backlit screen can display up to 3 inputs simultaneously and calibrator can store 5 instrument setups.