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| Brand | METTLER TOLEDO |
|---|---|
| Origin | Switzerland |
| Model | S4, S9 |
| Portability | Portable |
| Measurement Principle | Polarographic (Clark-type) or Optical (Luminescence-based) — configurable per probe |
| Measurement Range | 0.00–50.0 mg/L (ppm) |
| Accuracy | ±0.1 mg/L (0–8 mg/L), ±0.2 mg/L (8–20 mg/L), ±10% (20–50 mg/L) |
| Repeatability | ±0.05% of reading |
| Detection Limit | ±2 ppb (O₂ in water) |
| Ingress Protection | IP67 |
| Electrode Compatibility | ISM® (Intelligent Sensor Management) enabled |
| Data Interface | Waterproof USB (IP67-rated) |
| Display | High-contrast, sunlight-readable LCD with StatusLight™ indicator |
| Language Support | 12 languages including English, German, French, Spanish, Chinese, Japanese, Korean, etc. |
| Brand | METTLER TOLEDO |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Authorized Distributor |
| Product Category | Domestic (China-manufactured) |
| Model | SG9 |
| Instrument Type | Laboratory-Portable |
| IP Rating | IP67 |
| Measurement Principle | Optical Luminescence (RDO® Technology) |
| DO Range | 0.00–80.00 mg/L (ppm) |
| Resolution | 0.01 mg/L |
| Accuracy | ±0.1 mg/L (0–8 mg/L), ±0.2 mg/L (8–20 mg/L), ±10% (20–80 mg/L) |
| Saturation Range | 0.0–50.0% |
| Saturation Resolution | 0.1% |
| Barometric Pressure Range | 500–1100 mbar |
| Pressure Resolution | 0.1 mbar |
| Data Storage | 500 GLP-compliant records |
| Calibration Management | ISM® Intelligent Sensor Management |
| Sensor Interface | Digital ISM-enabled OptiOx probe |
| Communication | Infrared (IR) interface |
| Operating Modes | Standard / Expert |
| Endpoint Options | Auto, Manual, Timed |
| Compliance | GLP, ISO/IEC 17025-supporting workflows, FDA 21 CFR Part 11-ready (with optional software) |
| Brand | Mettler Toledo |
|---|---|
| Model | FG4 |
| Measurement Principle | Galvanic Cell (Self-Polarizing) |
| Temperature Compensation | Automatic (NTC 30 kΩ) |
| Atmospheric Pressure Compensation | Manual or Optional Barometric Sensor Input |
| Salinity Compensation | Manual Input (0–70 g/L) |
| Display | Backlit LCD with Electrode Status Indicator |
| Power Supply | 4 × AA Batteries (incl.) |
| IP Rating | IP67 |
| Operating Temperature | 0–50 °C |
| Storage Temperature | –25–70 °C |
| Compliance | CE, RoHS, ISO 5814 (Dissolved Oxygen — Electrochemical Probe Method) |
| Electrode Compatibility | LE611 (Standard), LE612 (Ruggedized) |
| Data Output | None (Standalone Unit) |
| Calibration | 1-point Air Saturation or 2-point (Air + Zero Solution) |
| Units | mg/L, % saturation, ppm, µmol/L |
| Resolution | 0.01 mg/L (DO), 0.1 °C (Temp) |
| Accuracy | ±0.2 mg/L (0–20 mg/L), ±0.5 °C (Temperature) |
| Brand | METTLER TOLEDO |
|---|---|
| Origin | Switzerland |
| Type | Online DO Analyzer |
| Measurement Principle | Optical Luminescence Quenching (ISO 5814:2012 compliant) |
| Range | 0.00–80.00 mg/L (0– saturation, 0–50 ppm, 0–50,000 ppb) |
| Accuracy | ±0.2 mg/L at 25°C |
| Repeatability | ≤0.05% of reading |
| Detection Limit | <2 ppb (in high-purity water mode) |
| Sensor Technology | ISM® (Intelligent Sensor Management) enabled |
| Compliance | FDA 21 CFR Part 11 ready, USP <1231>, ASTM D888, ISO 5814, EN 25814 |
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