Keep accurate load data records of temperature and humidity with this portable Hygrometer /Thermometer. Our model includes a digital clock which is selectable for 12 or 24 hour time and has as alarm feature. The large LCD display constantly shows current temperatures from 23 F to 122 F with one percent resolution (selectable F or C). Measures current humidity from 20 percent to 99 percent with 1percent resolution. Also records minimum and maximum temperature for each day. These instruments are used by shooters to help keep accurate records for future reference.
Sinclair, Issue:5B, Page:174