... , 12VDC, 24VDC auxiliary power supply for sensors and transmitters.(option).Could select 4-20mA, 0 ... 240 TFT color LCD displayInput channels: 1,2,3,......16, completly photoelectronic isolation.Input: ... temperature:0-50°CEnvironmental humidity:0-85%RHAs a proffestional and experience manufacturer, we supply high performance and quality paperless recorder, temperature recorder, temperature and humidity ...