The YSI ProSolo is designed to make water quality testing easier, faster, and more reliable than ever before. Built on YSI’s industry-leading ODO® technology, the ProSolo combines rugged field performance with advanced features that deliver unmatched accuracy and convenience—whether you’re in the field or in the lab.
Connect to ODO/T, ODO/CT, or ProOBOD probes
Cable lengths from 1–100 meters
Ideal for aquaculture, coastal monitoring, wastewater, wetlands & lab BOD testing
Optical DO sensors = no stirring, no membranes, no electrolytes
Higher accuracy & stability with less drift
Lower maintenance, longer life
Smart sensors store calibration data—swap probes without recalibration
Rugged, IP-67 waterproof design
Drop-tested, military-spec connector
3-year handheld warranty + 2-year probe & ODO cap warranty
Store 100,000+ data sets onboard
Export instantly to included USB drive
Easy 2-way sync with Kor Software
Site & Data ID tagging for organized reporting
Quick, simple calibration
Long-life, rechargeable lithium-ion battery
Single-cable design for any probe length
Comfortable ergonomic grip
Bright color display + backlit keypad for low-light use
ProSolo kits are available and include the handheld unit, an ODO/T or ODO/CT probe, and a soft carrying case.
Note: The ProSolo is not compatible with ProDSS 4-Port or ProSwap 1-Port cables.
The instrument can be supplied as kit or components available for purchase separately.
| ProSolo Handheld Specifications | |
| Calibration | 400 detailed calibration records can be stored and are available to view, download, and print |
| Certifications | CEC, CE; RoHS; IP-67; WEEE; FCC; UN Part III, Section 38.3, Test methods for lithium-ion batteries (Class 9) |
| Data Management | 100 user-defined sites and 100 user-defined data ID tags; site pictures can be sent to the handheld via KorDSS |
| Display | Color, LCD graphic display; 3.9 cm width x 6.5 cm height |
| Languages | English, Spanish, German, French, Italian, Norwegian, Portuguese, Japanese, Chinese (Simplified & Traditional), Korean, Thai |
| Logging Capabilities | Single point or continuous with autostable feature |
| Memory | >100,000 data sets |
| Operating Temperature | 0 to 50 °C (32 to 122 °F) |
| Power | Rechargeable lithium-ion battery pack provides ~48 hours with the handheld only; battery recharge time is ~9 hours with the AC power adapter; the instrument can also be powered via AC or external power pack through the USB port |
| Size | 8.3 cm width x 21.6 cm length x 5.6 cm depth (3.27 in x 8.5 in x 2.21 in) |
| Storage Temperature | 0 to 45 °C (32 to 113 °F) with battery installed; 0 to 60 °C (32 to 140 °F) without battery installed |
| USB | Built-in micro USB On-The-Go port for PC connection, recharging/powering the handheld and connecting directly to a USB stick |
| Warranty | 3-year handheld warranty |
| Weight | 567 grams (1.25 lbs) with battery |
| ODO/CT Specifications | |
| Size | 2.46 cm diameter, cable options for 1, 4, 10, 20, 30, 50, and 100 m lengths |
| Dissolved Oxygen (Optical luminescence) Units: % saturation, % saturation local, mg/L, ppm |
Range: 0 to 500%, 0 to 50 mg/L Accuracy: - 0 to 200%: ±1% of reading or 1% saturation, whichever is greater - 200 to 500%: ±8% of reading - 0 to 20 mg/L: ±0.1 mg/L or 1% of reading, whichever is greater - 20 to 50 mg/L: ±8% of reading Resolution: 0.01 mg/L and 0.1%, or 0.1 mg/L and 1% (auto-adjusts based on range) |
| Temperature (Thermistor) Units: °C, °F, K |
Range: -5 to 70°C (DO mg/L measurement range: -5 to 50°C) Accuracy: ±0.2°C Resolution: 0.1°C or 0.1°F (auto-adjusts based on range) |
| Conductivity (Four nickel electrode cell) Units: μS/cm, mS/cm |
Range: 0 to 200 mS/cm Accuracy: - 0 to 100 mS/cm: ±0.5% of reading or 0.001 mS/cm, whichever is greater - 100 to 200 mS/cm: ±1.0% of reading Resolution: 0.001, 0.01, or 0.1 mS (range dependent) |
| Specific Conductance Units: μS/cm, mS/cm |
Range: 0 to 200 mS/cm Accuracy: - 0 to 100 mS/cm: ±0.5% of reading or 0.001 mS/cm, whichever is greater - 100 to 200 mS/cm: ±1.0% of reading User selectable reference temperature (15 to 25°C; default 25°C) and compensation coefficient (0 to 4%/°C; default 1.91%) Resolution: 0.001, 0.01, 0.1 mS/cm |
| Warranty | 2 years on cable, probe, and ODO sensor cap |
| ODO Specifications | |
| Size | 2.46 cm diameter, cable options for 1, 4, 10, 20, 30, 50, and 100 m lengths |
| Dissolved Oxygen (Optical luminescence) Units: % saturation, % saturation local, mg/L, ppm |
Range: 0 to 500%, 0 to 50 mg/L Accuracy: - 0 to 200%: ±1% of reading or 1% saturation, whichever is greater - 200 to 500%: ±8% of reading - 0 to 20 mg/L: ±0.1 mg/L or 1% of reading, whichever is greater - 20 to 50 mg/L: ±8% of reading Resolution: 0.01 mg/L and 0.1%, or 0.1 mg/L and 1% (auto-adjusts based on range) |
| Temperature (Thermistor) Units: °C, °F, K |
Range: -5 to 70°C (DO mg/L measurement range: -5 to 50°C) Accuracy: ±0.2°C Resolution: 0.1°C or 0.1°F (auto-adjusts based on range) |
| Warranty | 2 years on cable, probe, and ODO sensor cap |