Measurement & Range: Dissolved Oxygen - 0 to 20.0 mg/L. Display: 13 mm ( 0.5" ) LCD, 3 1/2 digits. Accuracy: ± 0.4 mg/L. (after calibration within 23± 5 ?) Resolution: 0.1 mg/L Power Supply: 006P DC 9V battery (Heavy duty type).Brand: rjlabsModel Number: REF008Suitable For: Dissolved Oxygen MeterLength: 131 mm
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