The paper presents response behavious of oxygen sensors manufactured in the laboratory following archievements gained by of author's group in the field of oxygen sensor. Response time received by almost kinds of sensors is less than 20s, in some cases
it is in agreement with published articles. Typical paremeters of sensor such as stability, sensibility, linearility were investigated. A comparison of home made sensors with imported sensors from Japan and Australia was conducted. Data showed the similarity in term of working ability of those sensors. Home-made sensors therefore can be used in place of imported one for environmental monitoring in Vietnam.