Fluke 725Ex Intrinsically Safe Multi-function Process CalibratorFluke 725Ex Intrinsically Safe Multi function Process Calibrator The Simply Powerful Intrinsic Safe Calibration Tool The new 725Ex Intrinsically Safe Multi function Process Calibrator is powerful yet easy to use. Combined with one of the (8) new Fluke 700PEx pressure modules, the 725Ex is able to calibrate almost any process instrument likely to need service in an area where explosive gasses may be present. Measure and source mA, volts, temperature