The OM-EL-USB Series makes sophisticated data logging easy. All four models plug directly into a computer’s universal serial bus (no cable required) and use intuitive Windows software to let users measure, depending on the model, temperature, temperature/relative humidity, voltage or current. Users can store, print or export collected data. Powered by a long-life lithium battery, all models have LEDs that show status of the logger and of the two programmable alarm thresholds. With their caps on, they meet IP67 moisture-protection standards.