Technology Sourcebook
www.foodengineeringmag.com/articles/94542-data-loggers

Data loggers
September 13, 2015
Compact and portable, Omega OM-90 series data loggers feature an immediate, delayed (specific date/time) or pushbutton start; a real-time mode; user-configurable high and low alarms; LED status indicators; and a USB interface for data transfer. The OM-91 version is used to log temperature, while the OM-92 model logs temperature and relative humidity.
Omega; 800-TC-OMEGA