AES - 60 type handheld air ion detector is a small ion detector, Britain imported technology and equipment, beautiful and easy, can be customized and PM2.5 observed air ions change, is a scientific instruments of money and cheap beauty, its AD and amplifier with high precision, can be measured ten minus 15 current signal, the data measured in the industry the highest level, using sliding zero test method and equipment to provide zero shield, to test the zero may at any time, and the accuracy of the testing equipment, has the very good consistency, the equipment has high reliability.