Description: DISSOLVED OXYGEN METER, separate probe Model : PDO-520 * Range : 0 to 20.0 mg/L x 0.1 mg/L. * Temperature : 0 to 50 oC, oC/oF. * Automatic temperature compensation. * Separate DO probe easy for remoting operation. * Polarographic type oxygen electrode, professional. * Data hold, Record ( max., min. ). * External calibration buttons. * DC 1.5V battery ( UM-4, AAA ) x 4.
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