Carbon monoxide detector

/kˈɑːbən mʌnˈɒksaɪd dɪtˈɛktə/

/kˈɑːɹbən mʌnˈɑːksaɪd dɪtˈɛktɚ/

an electronic device that detects the presence of carbon monoxide gas and sounds an alarm to alert occupants in case of high levels of the gas, which is poisonous and can be lethal