The RTR-5 family of data loggers is portable and waterproof with battery life up to two years. These units are suited for wet, freezing or high humidity environments. The handheld portable data collector features real-time monitoring with audible alarms, and the ability to download logged data and view the results with graphical displays. In addition, the data can be downloaded via USB connection to a PC. Another family member is the network connected data collector with LAN interface using wireless 802.11b option. The built-in Web server allows viewing through a Web browser. Additional features include real-time monitoring and auto-downloading of logger data.