The Extech RHT10 Humidity and Temperature USB Datalogger, 32,000 Readings (16,000 for each parameter: humidity and temperature)) with user programmable sample rates from 2 seconds up to 24 hours for days, weeks and months. It has a USB interface for easy setup and download and Dew Point indication via included Windows software. The RHT10 features user-programmable High/Low alarm thresholds for RH and temperature.