The AQ200 is a new indoor air quality monitor from E Instruments. The multifunctional, handheld tester monitors carbon dioxide, carbon monoxide, ambient temperature, atmospheric air pressure, humidity and more. The device also has 8,000 memory points, PC software and wireless communication.

E Instruments, Test and Measurement Department, 172 Middletown Blvd., Suite B201, Langhorne, PA 19047; (215) 750-1212; fax (215) 750-1399; www.E-Inst.com.