The DL-3 data logger is fully qualified for use with Eco Sensors instruments and applications. It connects to the C-30ZX and C-21 ozone monitors via their analog DC voltage or current outputs to record sensor data.

Offering multiple logging options—including minimum, maximum, average, and standard deviation—the unit allows for flexible data analysis. Logged data can be stored internally (up to 1.9 million measurements for extended deployments) or streamed continuously to a computer via USB.

The rugged, easy-to-operate design features a built-in LCD screen that confirms operation, displays near real-time readings, and provides on-screen alarms when sensor thresholds are exceeded.