The Model GDL Graphical Display Data Logger can record and instantly display trends for temperature, humidity and dew point. The display can show measurement trends in text or graphic format. Other features include a logging summary which details the sample rate and memory status. Recording starts immediately with the push of a button or at a user specified date and time. With the Windows® based software, the user can select the sampling interval, high/low alarm settings, logging channels and recording start time. Over 40,000 data points can be downloaded by way of a PC’s USB port. Measured data stays secure with a recording session counter and password-protected calibration. The Model GDL comes equipped with batteries, software and a USB cable.