It is able to give out the result within 45 sec. An optical fiber cable goes along with the counter to connect the device to a PC or display screen to transfer data. It can be widely applied to various kinds of oil, such hydraulic oil, lubricant oil, gearbox oil, insulating oil (transformer oil), etc. Due to its small size and light weight, it can be easily installed on machines which consist of hydraulic system or lubricant circuit, etc. Therefore, the real time monitoring of the oil quality will be available.