Additel ADT 273Ex [ADT273EX-V15-PSI-N-HART] ATEX Certified Intrinsically Safe Handheld Pressure Calibrator w/HART Communicator, 0.02% FS, 1/4NPT Male, Gauge Pressure, -15 to 0 PSI. The Additel ADT226EX Intrinsiclly Safe Multi-functional Process Calibrator takes portability, functionality, and accuracy to a whole new level and packages it with an intuitive and easy to use color touchscreen display. The ADT226EX is a powerful yet cost effective process calibrator. The ADT226EX series brings an all new user interface to the world of process calibrators. With a menu driven interface and small size/weight, the ADT226EX is the industry's smallest intrinsically safe multifunctional process calibrator. It adopts advanced human hand engineering design for the most convenient field handheld process calibrator available. The ADT226EX has been developed with a powerful embedded operating system which solves common problems of other designs including slow response, cumbersome key operation, high power consumption and overall slow processing. The ADT226EX features improved accuracies including an electrical accuracy of 0.015% RD + 0.005% FS, high-static differential pressure mode accuracy to 0.002% FS and across the board improvements in temperature measurement accuracies. The ADT226EX delivers highly improved thermocouple measurement capabilities by vastly improving the cold junction compensation(CJC) specifications and a much improved stabilization time. In addition to all the great features mentioned above, the ADT226 series is loaded with time saving features like a builtin pressure and temperature converter, thermal calculator, wiring diagram guide for assisting with electrical connections, a built-in diagnostic center including intelligent alarm messaging and a real time error report and comprehensive selftesting to help our customers get the very most out of their investment in Additel calibration tools.