Bacharach has released two new models of its portable gas monitors. The Comfort Chek 500 is a handheld carbon dioxide air quality monitor equipped with a stable infrared sensor that measures and displays zero to 5,000 parts per million. It also measures temperature and relative humidity. The Comfort Chek 500 includes features such as long run time, data logging, and a USB output for remote data download with IEQ Chek data-logging management software. The IEQ Chek indoor environmental quality monitor has a seven-sensor capacity and measures, monitors and records temperature, humidity, carbon dioxide, and up to four additional plug-and-play sensors. Available with or without an on-board pump for sampling the air, the IEQ Chek has a wide selection of sensor options such as carbon monoxide, oxygen, nitrogen dioxide, nitric oxide, formaldehyde, sulfur dioxide, ammonia, hydrogen sulfide, combustible gases and volatile organic compounds.

Bacharach Inc., 621 Hunt Valley Circle, New Kensington, PA 15068-7074; (724) 334-5000; fax (724) 334-5001; www.MyBacarach.com.