Riddell football helmets are tested with an impact device at Simbex, a medical device commercialization company, on Thursday, April 13, 2017, in Lebanon, N.H. Helmets outfitted with the Simbex Head Impact Telemetry System (HITS) are tested daily. The HITS technology consists of sensors placed on the inside of football helmets that measure the force of impacts to the head. (Valley News – Jovelle Tamayo) Copyright Valley News. May not be reprinted or used online without permission. Send requests to permission@vnews.com.