Hebei Weitan Technology (河北微探科技有限公司) is based in the Tangshan High-Tech Development Zone. It develops, makes and sells fibre-optic sensing technology, industrial IoT devices and AI temperature-monitoring platforms. Products include distributed fibre-optic temperature measurement systems, cable-type linear heat detectors and wireless temperature monitoring for power and industrial sites. Its linear heat detectors hold fire product certifications 5982025ZY010016 and 5982025ZY010010 from the Tianjin Fire Research Institute of the Ministry of Emergency Management.