Waterproof Dissolved Oxygen Meter Pen Plant Care/Pest & Disease Control Factory-calibrated for temperature

Factory-calibrated for temperature

Learn how big seedlings should be before transplanting

molded walls keep work contained

Made from premium leather for lasting durability

essential oils and fragrances

Waterproof Dissolved Oxygen Meter Pen Plant Care/Pest & Disease Control Factory-calibrated for temperatureMeasures 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. Also holds readings and recalls