The DCO 10001 carbon monoxide meter is a battery-operated device that features an electromechanical CO sensor with three points of auto calibration. The meter has a backlit LCD display and simultaneously exhibits dual readings of carbon monoxide and max hold, updated every second. Other features include adjustable alarm settings and an audible alert to indicate dangerous CO concentration. The instrument comes with a soft case, wrist strap, three “AAA” batteries and an instruction manual.

General Tools Manufacturing Co., 80 White St., New York, NY 10013; (212) 431-6100; fax (212) 431-6499; www.generaltools.com