Extech EXT RH520A Humidity + Temperature Graphical Chart Recorder

Humidity and temperature chart recorder is ideal for monitoring and recording temperature and humidity history in critical environments. Internal memory records up to 49,000 data points that can be transferred to a PC via RS-232 serial port and LCD indicates percentage of remaining memory. Download, analyze and store data using included Windows? 95/98/2000/NT/ME/XP Compatible Software. Ships complete with built in stand, detachable probe with 3' cable, RS232 cable, software, 110VAC adapter and 3 AA batteries. <a hr