HST Series HEAT DETECTOR TESTER is a portable battery powered test tool for probe or "stick" type heat detectors and makes it possible to test VERY HIGH TEMPERATURE heat detectors quickly, accurately & safely even on detectors mounted up to 30 feet in height. Skinner Innovations is the manufacturer of unique test equipment for the fire protection industry. We have extensive knowledge of the Fire and Gas protection industries, Instrumentation, Electrical, and Manufacturing.