The AirSense 310 infrared carbon dioxide sensor measures CO2concentrations in the parts per million (ppm) range. Designed for demand-controlled ventilation and ASHRAE 62-89 compliance monitoring/control applications, the unit provides a continuous, accurate reading of indoor CO 2levels, to maintain an optimum level of fresh air, says the company. Using a 4-20 mA current loop or 0 to 10-V interface, the monitor is easy to install and support, with isolated power supply and low power consumption, the company says.

Perfect Sense Inc., SUNY Farmingdale, Conklin Building, Suite 111, Farmingdale, NY 11735; 631-249-4363; 631-755-4065 (fax); (e-mail); (website).