The multi-functional measurement device with printer function for the service technician. THE PERFECT SYSTEM The Précise 1100 SD is a battery powered as well as mains operated measurement device. It serves to determine the percentage of the oxygen content, the flow measurement at the outlet of oxygen concentrators and pressure measurement of non-aggressive gases. The measured report or the graphs can be printed out with a thermal printer when plugged in at the mains. For the oxygen concentration and flow measurement, a maintenance free ultrasonic sensor is set up. This sensor must not be recalibrated. The oxygen concentration measurement is based on the various running times of the sonic impulses in oxygen and nitrogen. With the flow measurement, the various running times of the sonic impulses in the direction of flow and against the direction of flow are evaluated. The pressure measurement takes place through a pressure sensor. For further information please download the productflyer or the manual as attached PDF-document on the rights side.