SentryCom Software Video Quick Start Guide Posted on April 23, 2018May 5, 2018 Welcome to the quick start guide for use of The SentryCom Software with your Radiation Alert® Sentry EC. Learn how to download data, set alarms, and name the units for deployment to your crew right from your PC. The Radiation Alert® Line of Geiger Counters and Radiation Detectors by S.E. International. Instructional videos and reviews. Quick start guide for use of The SentryCom Software with your Radiation Alert SentryEC.