PT520B+Rilevatore di Gas Naturale Ricaricabile Rilevatore di Perdite di Gas con 17 Pollici Pro...
Visual and Audible Alarm: TopTes PT520B+ could respond to gas leaks in 0.5s. The current gas concentration will be displayed in PPM or %LEL in four-digit reading. Visual and audible alarm will react seriously as the gas concentration increase.