Simply insert any of these compact, 4.5 inch (11.4 cm) L loggers into your computer USB port, name it, choose your required sampling rate, Select high and low alarms If required, and set the logger start time. Once configured, the logger can be removed from the computer to log independently. Data is downloaded back onto the PC where it can be analyzed and viewed as a graph using included software. Current measurement is provided by EL-USB-4 model which stores over 32, 000 readings covering the 4 to 20 MA measurement range, and can be connected to an external sensor via screw terminals located in the cap. Direct-to-usb connection and easy-to-use functionality user-programmable alarm thresholds all data loggers come with software.