The AQ Comfort from E Instruments, Langhorne, Pa, facilitates indoor air quality monitoring and real-time data logging, while the AQ Comfort-1 model measures % RH, CO2, dew point, differential pressure, temperature, differential temperature, and wet-bulb temperature. The compact, handheld unit offers immediate response time and comes with an easy-to-use menu system. PC software and a USB port are included, along with a Li-ion rechargeable battery, a magnetic rubber boot, and an optional carbon monoxide sensor for safety. Designed and made in the United States. For more information, visit E Instruments.