| HSI Sensing is one of the five companies worldwide to achieve UL 634 Level 2 listing |
HSI Sensing, an Oklahoma-based manufacturer of custom reed switch and sensor technology, announced its Sentinel high-security entry-point sensor has been UL 634 Level 2 listed, placing it among an elite group of security sensors capable of monitoring highly sensitive areas. HSI Sensing is one of only five companies worldwide to achieve the UL 634 Level 2...