COMBUSTION ANAYLZERThe BTU900, a high-efficiency residential combustion analyzer was developed for boiler and burner set-ups, servicing and maintenance. The unit is available in two or three gas options, and is upgradeable to nitrogen oxides. The device can be used on all 90-plus-rated furnaces and comes with replaceable sensors. It also includes Bluetooth wireless communication as well as software capabilities for analysis. A built-in manometer, thermometer and carbon monoxide leak detector are also included.

E-Instruments, 402 Middletown Blvd., Suite 216, Langhorne, PA 19047; (215) 720-1136; fax (215) 750-1399; www.e-inst.com