Electronic fumigation gas monitors provide continuous read-out of gas concentrations with digital displays. Handheld monitors are designed to be carried, for personal protection or leak detection. Portable instruments are designed to be placed on a bench-top for area monitoring using a built-in sampling pump. Sensors are available for phosphine (PH3), methyl bromide (MBr), carbon dioxide (CO2), and sulfuryl fluoride (SO2F2). Advanced-firmware instruments offer datalogging and Bluetooth download options.