The Companion 325M combustion analyzer performs testing of O2, CO2, CO, and draft and efficiency checks. The company says that the analyzer features many upgrades, including convenient backlit display, differential pressure/ draft testing, CO readings to 4,000 PPM, a new carrying case, and the ability to store and print separate ambient CO readings. According to the manufacturer, the condensate trap and filter assembly eliminates sample moisture and contaminants to protect the pump and sensors and ensure a long operating life. The 325XL has the same features as the 325M, as well as other features, including memory storage for 20 tests and two additional fuel choices.
Testo Inc., 35 Ironia Rd., Flanders, NJ 07836; 800-227-0729; email@example.com (e-mail); www.testo.com (website).