Test flue gasses at home or office spaces for the presence and location of CO leaks. With a protective rubber boot, the new 707 fits comfortably in your hand and operates with the push of a button. - Clear and fast response with advance pump driven technology. - Peak Hold to capture peak CO reading. - Instrument recycles and will not shut off if 15ppm CO is present, increasing safety. - Store Button allows you to save up to eight readings and then print using the IR port and optional A740 printer. - 1 ppm sensitivity. - Measures up to 10,000ppm. - Push on fittings are fast and easy to use. - Large easy to read backlit display. - Advanced electrochemical sensor is field replaceable and calibrateable. - Protective rubber boot and soft carrying case with shoulder strap is included.