SGILE combustible material gas detector is a highly painful, wide-Srange gas, which detects methane, cast gas, coal gas and strange inflammable gases in versatile situations and locations. It gear mechanism sensitivity senor that locates leaking spots quickly, along with loud and visible alarms. This requisite tool is for technicians, miners, construction workers, and homeowners. perceptible Gas : - Hydrocarbon -LRB- methane, cast gas, ethane, propane, benzene, acetylene, pentane, hexane, gas oil, toluene -RRB- - Halogenated hydrocarbon -LRB- methyl chloride, methylene chloride, vinyl chloride £ © - Alcohol -LRB- methanol, ethanol -RRB- Warm-up Time : 30 seconds Gas Sensitivity -LRB- changeable -RRB- : As utter as 5ppm Response Time : Instantaneous Operating Temperature Range : 14 ~ 122 fahrenheit Duty Cycle : unbroken ; No limitation Sensing tip : conciliatory Probe Length : 300 mm -LRB- sensing tip included -RRB- Alarm : Siren alarm / indicator get down Battery : AAA alkaline batteries x 3 -LRB- not included -RRB- Size : 120 x 65 x 25 mm Weight : 175g .