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Economical pocket dissolved oxygen tester, 1 or 2 points calibration, setup menu contains 6 options, suitable for educational and aquaculture applications, accuracy 0.5 mg/L.

Wireless Bluetooth dissolved oxygen tester for Android smartphone or tablet, selectable BOD, OUR and SOUR measurement modes, accuracy 0.2 mg/L.

Economical portable dissolved oxygen meter, 1 or 2 points calibration, automatic temperature compensation, suitable for outdoor applications, accuracy 0.5 mg/L.

Professional portable dissolved oxygen meter, 1 or 2 points calibration, selectable salinity and barometric pressure coefficients, accuracy 0.2 mg/L.