Shandong dory electronic technology co., LTD., founded in 2013, headquarters is located in Jinan high-tech zone, Shandong province. We focus on gas alarm, gas detector, toxic and harmful gas detection equipment and system engineering.We are set dependent research and development, design, production, sales and service as one of the high-tech enterprise. With complete qualifications, our company has obtained explosion proof certificate, type approval certificate for products, production license, inspection certificate, calibration certificate and type approval certificate for repair measuring instruments, etc. We also have the import and export qualification, and passed the international quality system certification ISO9001:2015. Products are widely used in gas, petrochemical, coal, power, pharmaceutical, building, mine, metallurgical coking and other industries and family life.