Waterproof Portable DO Meter AD630

Waterproof Portable DO & Temperature Meter Measures Dissolved Oxygen (ppm, % saturation) and Temperature 1 or 2-point calibration (0% & 100%) or custom calibration Galvanic DO probe with built-in temperature sensor Automatic Temperature Compensation (ATC) Manual Salinity & Altitude Compensation Power: 4 × 1.5V AA batteries | Warranty: 1 Year | Origin: Romania