... Barometric Pressure Compensation: The salt dissolved in solution will limit oxygen content. LDR-8 series can compensates salinity and barometric pressure ... set parameter units accord with your country. E.g, Dissolved oxygen units: mg/L and ppm; Barometric pressure units: kPa and ... , you can print out test report via software. ModelLDR-820BANTE821Dissolved Oxygen Range0.0~20.0mg/L or ppm0.00~20.00mg ...