The Amprobe GSD600 Gas Leak Detector is a fast responding gas leak detector for methane and propane gas. The GSD600 meter emits a frequency tone when gas is detected. The frequency of the beep coincides with the concentration of the gas. The LEDs display the level of gas present in an area or room and helps assess whether the area is safe or needs to be vented. Pinpoint gas leaks for closed piping systems. Use the mute function in quiet work areas and utilize the LED displays. Or a standard earphone jack for hearing the meter in loud environments. The display provides an accurate measurement of the presence of gas in the area.