Sper Scientific Dissolved Oxygen Pen Model 1414387

Measures dissolved oxygen to determine water quality in environmental testing, labs, industrial and municipal wastewater, aquariums and fish hatcheries Designed for simple one-hand operation with automatic temperature compensation and calibration to air The polarographic probe has a built-in temperature sensor and easy-to-replace pop-off probe heads Simultaneously displays dissolved oxygen and temperature readings Holds readings and recalls minimum and maximum IP65 waterproof Comes ready to use in a soft carrying case with belt loop, two spare probe heads, electrolyte and 4 AAA batteries Meets EPA Equivalency Method: 360.1 Dimensions: 7¾" × 1½" × 1½" (197 × 38 × 38 mm) Weight: 4.1 oz (116 g) Dissolved Oxygen Range: 0 to 20.0 mg/L, Resolution: 0.1 mg/L, Accuracy: ±0.4 mg/L Oxygen % in Air Range: 0 to 100% O2, Resolution: 0.1% O2, Accuracy: ±0.7% O2 Temperature Range: 32 to 122°F (0 to 50°C), Resolution: 0.1°F (0.1°C), Accuracy: ±1.5°F (±0.8°C)