The most common use for a gas detector is for the safe monitoring of Chlorine Gas in applications such as Industry and Water Treatment (both Potable and Waste). This gas detector is known as the Guardian FX-1500 which has a fast detection response for warning of potential danger to personnel. The option of having an Uninterrupted Power Supply for peace of mind also exists. This style of gas detector is not limited to only Chlorine but also Sulphur, Ammonia and most other types of common gases.