Short Description: A combustible gas detector is also known as leak detector. The range of this product is 0 to 100%; the advanced sensor option is Butane 0-100%Vol. Its sensitivity is LPG 2000 PPM and LNG 4000 PPM . It detects the LNG, LPG, CH4, Methane and butane. It is a combination of gas detector type and the instrument type.It is used by contractors and homeowners to check gas leaks in plumbing and appliances.