DISSOLVED OXYGEN METER, all in 1

* Range : 0 to 20.0 mg/L x 0.1 mg/L.

* Temperature : 0 to 50 oC, oC/oF.

* Automatic temperature compensation.

* Probe with the meter, all in one.

* Polarographic type oxygen electrode,

professional.

* Data hold, Record ( max., min. ).

* IP-67 Water resistance, heavy duty.

* External calibration buttons.

* DC 1.5V battery ( UM-4, AAA ) x 4.