BW Technologies has introduced its GasProbe gas analyzer that features five instruments in one package: a flue gas analyzer, a gas appliance tester, a carbon monoxide safety monitor, a pressure meter and a digital thermometer. The handheld GasProbe calculates combustion efficiency of up to five fuels. Digital readings include O2, CO, CO2, CO/CO2 ratio and stack temperatures. The unit provides 15 hours of usage with a Black & Decker VersaPak NiCD rechargeable battery. Features include an automatic backlight, data storage and recall, electrochemical sensors and downloading to an optional infrared, cordless printer.