Profile: Caldyne, Incis a designer and developer of healthcare & industrial safety instrumentation & equipment. Our Exhalometer EX100® is a hand-held, microprocessor-controlled instrument that measures the expiratory parameters (tidal volume, respiration rate and minute volume) of patients being manually ventilated. Our Exhalometer® measures and displays the exhalation flow rate, the size of each exhaled breath (tidal volume), the number of respirations during the past minute, and the amount of gas the patient exhaled during the past minute (minute volume). This information permits the rescuer to easily control the ventilation they are providing the patient and thereby improve treatment. And for this reason the Exhalometer® should be used whenever, wherever, & for whatever purpose the MRD is being used - whether it is being used for CPR or to provide temporary ventilation or whether it is being used inside a hospital or even in a pre-hospital setting.