testo Gas Detector testo gas detector tracks down small gas leaks. According to DVGW leaflet G465-4, gas detectors are approved for aboveground gas detection up [...] ansehen     Escaping Flue Gas Detector testo 317-1 The testo 317-1 detector of escaping flue gases reliably detects escaping heating gases. The practical meter immediately gives off a visual and audibl [...] ansehen     testo 317-3 The testo 317-3 CO monitor detects the presence of carbon monoxide in the surrounding area and warns the user both visually and audibly about dangerou [...] ansehen