Henan Duotesi Electronic Technology Co.,Ltd. is a technology driven enterprise specializing in sensor R & D, production, and sales. With a focus on electrochemical, infrared, laser, and photoionization gas sensors, gas detector and etc. Duotesi offers 10 major product series, including precision instruments and gas detection controllers, totaling hundreds of variants. Equipped with high precision sensor workshops, instrument processing facilities, and advanced testing labs.We have been deeply engaged in markets such as Asia, the Middle East and Africa, and have achieved good results in these regions. Duotesi covers an area of 459 square meters and has 30 professionals, among whom there are over 5 technical experts. Duotesi has passed C E, A T E X and other certifications. Our quality guarantee: Free replacement within one year of warranty, lifetime support, and worry free returns. We supports both OEM and ODM services simultaneously and has 24 hours technical support.