Henan Otywell Electronic Technology Co., Ltd is located in National University Park of Zhengzhou, Henan Province. We are specialized in the manufacturing and marketing of positive pressure breathing apparatus and gas detectors for several years. As one well-known domestic gas detector manufacturer, our company pay much attention the the technological innovation and academic exchanges. With professional product research team and development institutions, we have obtained various national certificates such as national explosion-proof electrical products certification, national production licence for manufacturing measuring instruments, national explosion-proof electrical equipment installation certification, etc. Apart from this, we still constantly committed to the improving of our quality.