Expected delivery within 5 – 7 working days.
The YSI Pro 201 delivers all the essentials for accurate dissolved oxygen measurement in a rugged, easy-to-use handheld design. Built for reliability and simplicity, it is ideal for field or laboratory use.
Expected delivery within 5 – 7 working days.
Click-and-Drive Mount
Car Charger
USB-C Cable
Installation poster
The YSI Pro 201 Dissolved Oxygen Meter is a rugged, handheld instrument designed for accurate and reliable DO measurement in both field and laboratory settings. Combining durability with ease of use, it delivers dependable performance in demanding environments.
Rugged and Reliable
Built with durable construction, the Pro 201 ensures long-lasting performance even under harsh field conditions.
EPA-Approved Sensors
Equipped with sensors approved for wastewater compliance reporting of BOD, CBOD, and dissolved oxygen (DO).
User-Friendly Design
Features a simple, intuitive interface for fast setup, easy calibration, and efficient operation.
✅ Ideal for wastewater monitoring, environmental testing, and laboratory applications, the YSI Pro 201 DO Meter delivers trusted results every time.