Ohaus® Starter 400D Portable DO Meter, 5.91 L x 3.54 W x 1.38" H

Starter Portable DO Meter, 5.91 L x 3.54 W x 1.38" H, 300D Model, 0.2 ppm Accuracy, 0.01 mg/L, 0.1°C, 0.1% Measurement Resolution, 0 to 20 ppm Measurement Range, 0 to 20 mg/L (ppm); 0 to 50 °C Measurement Range, Color LCD Graphics