SI-300 is a sampling type fixed gas detector, that measures the sample gas through a sensor cartridge on a real-time basis. This is a device that helps to prevent or control various gases-related accidents including suffocation, intoxication, fire, explosion, corrosion, etc in several semiconductor or industrial sites. The measured gas concentration is transmitted in real-time with an output of 4-20 mA and can be configured through three internal relays. In addition, users also can widely benefit from the control set of RS-485/Ethernet/Bluetooth connections.