产品描述The OM-EL-USB-CO and OM-EL-USB-CO300 are standalone USB data loggers that measure and store up to 32,510 carbon monoxide (CO) readings over a 0 to 1000 ppm (OM-EL-USB-CO) or 0 to 300 ppm (OM-EL-USB-CO300) measurement range and -10 to 40°C (14 to 104°F) operating temperature range. The user can easily set up the logging rate and start time, and download the stored data by plugging the data logger into a PC’s USB port and running the Windows control software. The data can then be graphed, printed and exported to other applications. The data logger is supplied complete with a long-life lithium battery. Data is stored in non-volatile memory and is retained when the battery is empty. A bright red LED will flash and a buzzer can sound when a preset warning level has been exceeded.