GS221 addressable gas detector is designed to detect gas leaks, to generate an alarm and to transmit this information to the control panel. GS221 addressable gas detector can worked with all Redban control panels. It can detect all kinds of flammable and combustible gases. The device detects gases such as Natural gas (methane), bottled gas (propane), LPG (Liquefied petroleum gas), CNG (natural gas).

When GS221 detects while operating independent of the panel, the relay output active on it. In this way, a desired device (such as a gas valve) can be controlled. GS221 Gas detector is addressed by RB1201 Address programmer and this address information is stored in its permanent.