Shenzhen Hengtai Fire Engineering Co., Ltd. was established on June 05, 2012, engaged in indoor and outdoor decoration design and construction, mechanical and electrical engineering, fire products and equipment and other diversified excellent enterprises. In the construction process, formaldehyde, benzene series, ammonia, radon and other harmful substances are produced, which can induce human lesions and pose a threat to people's health and life safety. The project provides the ASD5300C detector and the JB-TB5100 alarm controller.