The E Instruments AQ Expert air quality monitor can measure 7 different gases simultaneously, in addition to temperature, % RH, and barometric and differential pressure; it offers real-time data logging. The monitor includes PC software and USB, wireless Bluetooth, an active internal sampling pump and Li-Ion rechargeable battery. An optional handheld probe is available.

E Instruments International; 215-750-1212; www.e-inst.com