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| Brand | YSI |
|---|---|
| Origin | USA |
| Model | YSI 58 |
| Type | Portable |
| Measurement Principle | Clark-type polarographic electrode |
| DO Range (mg/L) | 0–20 mg/L |
| DO Resolution (mg/L) | 0.01 mg/L |
| DO Accuracy (mg/L) | ±0.03 mg/L |
| DO Range (% air saturation) | 0–200% |
| DO Resolution (% sat) | 0.1% |
| DO Accuracy (% sat) | ±0.3% |
| Temperature Range | −5 to +45 °C |
| Temperature Resolution | 0.1 °C |
| Temperature Accuracy | ±0.3 °C |
| Temp Compensation Range | 0 to +45 °C |
| Salinity Compensation Range | 0–40 ppt |
| Salinity Compensation Accuracy | ±0.3% of compensated reading ±1 digit |
| Recorder Output | 0–1 V DC (0.5 V = 1 digit), ±0.4% full scale ±1 least significant digit, min. load 50 kΩ |
| Power | 4 × D-cell batteries (Zn-C or alkaline), ~1000 h life |
| Dimensions | 21.6 × 28.0 × 9.5 cm |
| Weight | 1.90 kg |
| Brand | YSI |
|---|---|
| Origin | USA |
| Model | DO200 |
| Instrument Type | Portable |
| Temperature Measurement Principle | Thermistor (10 kΩ @ 25 °C) |
| Temperature Range | –6 to +46 °C |
| Temperature Resolution | 0.1 °C |
| Temperature Accuracy | ±0.3 °C ±1 LSD |
| DO (% Air Saturation) Principle | Steady-State Polarographic (PE Membrane) |
| DO (% AS) Range | 0–200 % |
| DO (% AS) Resolution | 0.1 % |
| DO (% AS) Accuracy | ±2 % of reading or ±2 % air saturation, whichever is greater |
| DO (mg/L) Principle | Steady-State Polarographic (PE Membrane) |
| DO (mg/L) Range | 0–20 mg/L |
| DO (mg/L) Resolution | 0.01 mg/L |
| DO (mg/L) Accuracy | ±2 % of reading or ±0.2 mg/L, whichever is greater |
| Enclosure Rating | IP65 |
| Compensation | Automatic temperature compensation |
| Membrane Type | Next-generation fast-response, low-stirring-dependency PE membrane |
| Cable Options | 4 m or 10 m |
| Probe Construction | Stainless steel sensor with protective polymer sheath |
| Connector | Strain-relieved cable interface |
| Brand | YSI |
|---|---|
| Origin | USA |
| Model | YSI ROX |
| Measurement Principle | Fluorescence Lifetime Detection |
| DO Range (Air Saturation) | 0–500% |
| Resolution (Air Saturation) | 0.1% |
| Accuracy (0–200%) | ±1% of reading or ±1% air saturation, whichever is greater |
| Accuracy (200–500%) | ±15% of reading |
| DO Range (mg/L) | 0–50 mg/L |
| Resolution (mg/L) | 0.01 mg/L |
| Accuracy (0–20 mg/L) | ±1% of reading or ±0.1 mg/L, whichever is greater |
| Accuracy (20–50 mg/L) | ±15% of reading |
| Membrane Life | Up to 12 months |
| Flow Independence | Yes |
| Zero-Point Calibration | Supported |
| H₂S Resistance | Yes |
| Compatibility | Fully compatible with YSI ProDSS and EXO platforms (via optical port), YSI 6-Series multiparameter sondes |
| Brand | YSI |
|---|---|
| Origin | USA |
| Model | YSI 52 |
| DO (Air Saturation) | 0.0–199.9% |
| Resolution | 0.1% air saturation |
| Accuracy | ±0.1% air saturation + 1 LSD |
| DO (mg/L) | 0.0–19.99 mg/L |
| Resolution | 0.01 mg/L |
| Accuracy | ±0.03 mg/L |
| Temperature Range | −5 to +45 °C |
| Resolution | 0.1 °C |
| Accuracy | ±0.1 °C |
| Temp Compensation Range | 0 to +45 °C |
| Salt Compensation Range | 0–40 ppt |
| Resolution | 0.01 ppt |
| Accuracy | ±1.0% of reading or ±0.1 ppt (whichever is greater) |
| Data Storage | 70 non-volatile memory records (DO, temp, date, time) |
| IP Rating | >IP65 |
| Power | 6 × D-cell alkaline batteries (typical life: 100 h) |
| Dimensions | 21.6 × 28.0 × 9.5 cm |
| Weight | 2.4 kg |
| Brand | Xylem |
|---|---|
| Origin | USA |
| Model | YSI Pro20 |
| Instrument Type | Portable |
| Measurement Principle | Polarographic & Galvanic (User-Selectable Sensor Types) |
| DO Range | 0–50 mg/L |
| Accuracy | ±2% of reading (0–20 mg/L) or ±0.2 mg/L, whichever is greater |
| Repeatability | ±2% |
| Detection Limit | 0.1 mg/L |
| Temperature Range | –5 to 55 °C |
| Temp Accuracy | ±0.3 °C |
| Barometric Pressure Range | 53–133 kPa |
| Pressure Accuracy | ±0.4 kPa (within ±15 °C of calibration temperature) |
| Salinity Compensation | 0–70 ppt (manual input, automatic compensation) |
| Data Storage | 50 datasets with timestamp |
| IP Rating | IP67 |
| Drop Test | 1-meter drop resistance |
| Certifications | RoHS, CE, WEEE |
| Warranty | 3 years (instrument), 2 years (cable), 1 year (polarographic sensor), 6 months (galvanic sensor) |
| Brand | YSI |
|---|---|
| Origin | USA |
| Model | YSI 550A |
| Instrument Type | Portable |
| IP Rating | IP67 |
| Measurement Principle | Polarographic (Clark-type) Electrode with Thermistor Temperature Compensation |
| DO Range | 0–50 mg/L (0–500% air saturation) |
| Temperature Range | –5 to +45 °C |
| DO Accuracy | ±2% or ±2% air saturation (0–200%), ±6% (200–500%) |
| Temp Accuracy | ±0.3 °C |
| Resolution | 0.01/0.1 mg/L (selectable), 0.1 °C, 0.1/1% air saturation (selectable) |
| Battery Life | Up to 2000 hours |
| Cable Options | 3.7 m, 7.5 m, 15 m, 30 m |
| Calibration | Built-in DO calibration chamber, automatic temperature compensation, manual salinity & altitude compensation |
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