Handheld ozone tester LHOT-A10 is a microprocessor based unit suitable for ozone concentration detection in various industrial and special environments. It employs an electrochemical sensor and a built-in suction pump. It is integrated with a temperature and humidity detection function. Easy controls and customizable parameter settings offer functional flexibility to the end user. It is used in chemical industry, health and safety monitoring, ozone process control, personal exposure monitoring, source and leak detection; used to measure ozone concentrations in operation limited places pipelines, tunnels, etc.