... full color touch screen. Real-time display of test results and histogram during operation, and display of pump flow, battery capacity and time. 2 ... detection path.3. ParametersDisplay: 4.3 inch full color touch display screen.Range: 0-1000ppm, 0-100%LEL, 0-100%VOL ... sensor, thermal conductivity sensor, NDIR sensor (optional).Suction pump: diaphragm suction pump with the maximum flow of 1.2L/min, and ...