Lascar usb data logger carbon monoxide lascar el usb co the lascar el usb co data logger can take and store up to 32 510 readings of carbon monoxide co concentration over a 0 to 1000ppm measurement range the gathered data is downloaded to a pc via its usb port where it can be analysed printed or exported using the included purpose designed software the software also allows the setting up of the logger by enabling the logger name to be changed setting the sampling rate setting the war