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  • Dissolved Oxygen (% saturation)
    • Range: 0 to 500% air saturation
    • Accuracy: up to ±1% of the reading
  • Dissolved Oxygen (mg/L)
    • Range: 0 to 50 mg/L
    • Accuracy: up to ±0.1 mg/L or ±1% of reading
  • Temperature
  • Range: -5 to 70°C
    • Accuracy: ±0.2°C
  • Barometer
    • Range: 375 to 825 mmHg
    • Accuracy: up to ±1.5 mmHg
  • Stores up to 2000 data sets
  • Easy to read graphic, backlit display and keypad
  • USB connection allows interaction with powerful desktop Data Manager software

The YSI ProODO™ handheld dissolved oxygen meter provides extreme durability for the measurement of optical, luminescent based dissolved oxygen for any field application. Suitable for extreme fieldwork, the YSI ProODO™ is rated to IP-67 standards even without the battery cover on. Additionally, the YSI ProODO™ handheld dissolved oxygen meter features a tough rubber over-molded case, military spec (MS) connectors and a rugged, weighted probe guard.

Underneath the tough exterior of the YSI ProODO™ lies a precision instrument. Capable of dissolved oxygen readings in both percent saturation (range: 0 to 500% air saturation) and mg/L (range: 0 to 50 mg/L), the ProODO™ has an accuracy of up to ±1% and response time of T90 in approximately 25 seconds. Results are shown on backlit display. An internal memory can store up to 2,000 data-sets. Data Manager software is included allowing users to download or export data, configure instruments, and conduct real-time studies. Data can be viewed either in tabular form or graphically.

The YSI ProODO™ handheld dissolved oxygen meter utilizes "smart" digital sensor technology which stores calibration data within the sensor. This allows probes to be placed on any YSI ProODO™ instrument without re-calibration.

The YSI ProODO optical dissolved oxygen meter ships complete with meter, manual, batteries, communications saddle, USB cable, and Data Manager software. Cables must be ordered separately.

Required Components

These additional components are required for the operation of your product. We strongly advise you to purchase these components unless you already own them or own a suitable alternative.

YSI ProODO Cable and Probe
ProODO cable and probe includes ODO optical DO sensor and sensing cap
In Stock


YSI 625120 BOD Analyst Pro Software
Easy, efficient and accurate desktop software for the calculation of BODs


Self-stirring to provide a representative sample and increase response times


YSI Hard Carrying Case
The ultimate protection for your YSI Pro Series meter
YSI Soft Carrying Case
Organize any Pro Series meter and accessories while protecting them from the elements


Please consider these optional accessories.

YSI ProODO Sensor Cap
Replacement ODO sensor cap kit for the YSI ProODO dissolved oxygen meter

Application Notes

Here's how some of our customers used this product.

Monitoring Dissolved Oxygen in Water Treatment

The Background: Our customer is a hospital that maintains its own water treatment protocol and uses a system that does not rely on the heavy use of chemicals. They seek tools to ensure the water is adequately treated.

The Problem: The customer treats water with a combination of electricity and oxygen. They need to make sure enough oxygen is used to adequately treat the water.

The Solution: We suggested the YSI ProODO handheld dissolved oxygen meter. Unlike galvanic or polarographic dissolved oxygen sensors, the optical technology on the YSI ProODO is a non-consumptive measuring method. Aside from replacing the cap once per year, there is no maintenance required. The ProODO also has no flow dependency and does not require a lengthy warmup time.