Since 1910， General Tools has grown to become the recognized industry leader for specialty hand tools and instruments. The HT20 RH/Temperature USB Data Logger can be deployed on a job site or in key areas of a facility and left unattended for days， weeks or months. The temperature and humidity readings it makes and collects can be uploaded to a PC and viewed in Excel， making it easy to spot trends and unexpected excursions.

Units can be deployed and left in place over duration of the job to monitor the drying process

Plug-and-play USB 2.0 interface; no need for cables， cradles or docks

1-button starts/stops logging without a PC

Large storage capacity: Up to 16，000 pairs of RH and temperature readings

3-1/2-digit LCD displays real-time temperature and RH readings， device working status and "memory full"

Wide measurement ranges of: -4o to 158oF for temperature and 0 to 100% for RH

Included software is used to set sampling time (from 10 seconds to 12 hours) and Hi/Lo temp and RH alarm set points

Software also calculates dew point and wet bulb temperatures， and mixing ratio as GPP (grains per pound) or GPK (grams per kilogram)

Includes software on mini-disc， USB extension cable， user's manual， 1-year limited warranty