The Extech SD900-NIST allows technicians to easily monitor and record DC mA values from 3 external sensors, transducers, and other sources using one meter. The SD900 also stores the time and date of when readings are taken. The SD900 logger features a large triple LCD display and records data on an SD card in an Excel®-ready format for easy transfer to a PC for analysis, trending, and archiving. With NIST Calibration.