YSI PRO Series 20 - Dissolved Oxygen Meter
The YSI Pro20 dissolved oxygen meter is built for dependable DO and BOD measurement in demanding field environments while remaining accurate enough for laboratory testing workflows. Designed with durability and usability in mind, the Pro20 supports multiple dissolved oxygen sensor types and provides fast, stable readings for environmental monitoring, wastewater compliance, and research sampling programs.
This handheld meter measures dissolved oxygen and temperature and includes features such as internal barometric pressure compensation and rapid calibration functionality to help users collect high-quality data with minimal downtime. The instrument is compatible with interchangeable cables and sensors, allowing users to configure the system to meet specific project requirements.
Purchase compatible DO probes separately on our YSI PRO 20 Sensors Page
- Rugged handheld meter suitable for field sampling and laboratory BOD testing
- Supports polarographic and galvanic DO sensors
- One-touch calibration for fast setup and reduced user error
- IP67 waterproof rating with drop-tested durability for field reliability
- User-replaceable cables and sensors for reduced lifecycle cost
- Built-in barometer for improved DO measurement accuracy
- Fast DO response time (approx. 95% response in ~8 sec. with standard membrane)
- Stores up to 50 data sets
- Backlit graphic display and glow keypad for low-light visibility
- Available with multiple cable lengths to support varied sampling depths
- Long battery runtime using standard alkaline C-cell batteries
- Multi-language interface for global usability
- Environmental Monitoring
- Wastewater and Compliance Testing
- Industrial and Laboratory Use
- Surface water monitoring
- Groundwater Sampling
- Aquatic Research