... each channel,no interference3. Display, 6 digits LED 4.Data-logging function, Imported fixed probe,penless,anti-knock,no consumption ... every 100mm paper5.Real time, Key setting the current data and time6.Curve moving function7.Scale conversation function 8.UniversalInput ... RS232/RS485 (Please indicate when ordering) 12. Analog output, 2 line analog output 4 -20 mA (Please indicate when ordering) 13 ...