The SL100TH is Signatrol's entry level temperature and relative humidity data logger. The SL100TH is a totally self contained data logger.with its own battery that lasts for up to five years. The data logger is configured to wake up and take readings on a programmable sample rate from once every eight seconds to once every 34 minutes, each logger will hold 32,767 readings! The data logger is then placed in the area to be monitored. Once the logging period has been completed, the data logger is connected directly to the COM port on the computer and the software, supplied free with every data logger, is used to extract the stored data and display the information in graphical and data table format.