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| Brand | TriOS |
|---|---|
| Origin | Germany |
| Model | eCHEM DO |
| Type | Portable Optical Dissolved Oxygen Sensor |
| Measurement Principle | Luminescence-based (Optical Quenching) |
| Range | 0–20 mg/L (0–20 ppm, 0–200% saturation) |
| Accuracy | ±0.1 mg/L (±0.1 ppm, ±1% saturation) |
| Response Time (T90) | <60 s |
| Resolution | 0.01 mg/L |
| Temperature Compensation | NTC thermistor (0.01 °C resolution, ±0.5 °C accuracy) |
| Output Interface | RS-485 (Modbus RTU) |
| Power Supply | 12 V ±10%, 1 W |
| Cable Options | 2 m or 10 m polyurethane-sheathed |
| Pressure Rating | 5 bar |
| IP Rating | IP68 |
| Operating Temp | 0–50 °C |
| Storage Temp | −10–60 °C |
| Housing Material | Passivated Stainless Steel 316L (standard) / Titanium Alloy (marine version) |
| Membrane | Optically isolated silicone |
| Dimensions | 146 mm × 25 mm |
| Weight | 450 g (SS), 300 g (Ti) |
| Maintenance Interval | ≤0.5 h/month |
| Calibration Interval | Up to 2 years |
| Cross-Sensitivity | None for pH (1–14), CO₂, H₂S, SO₂ |
| Brand | AQUALABO |
|---|---|
| Origin | France |
| Model | S200 |
| Instrument Type | Online Analyzer |
| Measurement Principle | Potentiometric (Gold Ring Electrode) |
| Ozone Range | 0–1 mg/L or 0–5 mg/L |
| pH Range | −2 to 16 |
| Temperature Range | −30.00 to 140.00 °C |
| Accuracy | ±2 % of full scale |
| Resolution | Ozone 0.001/0.01 mg/L |
| Response Time | 30 s |
| Max. Operating Pressure | 8 bar @ 20 °C |
| Max. Water Temperature | 70 °C |
| Flow Rate | 40–120 L/h |
| Sensor Material | Glass body with gold ring electrode |
| Enclosure Rating | IP65 |
| Power Supply | 230 VAC ±10 % or 110 VAC ±10 %, 50/60 Hz |
| Power Consumption | 16 VA |
| Dimensions (W×H×D) | 160 × 165 × 85 mm |
| Weight | 1.1 kg |
| Brand | AQUALABO |
|---|---|
| Origin | France |
| Model | OPTOD |
| Instrument Type | Portable & Online |
| Measurement Principle | Fluorescence Quenching |
| Range | 0.00–20.00 mg/L (ppm) / 0–200% saturation |
| Accuracy | ±0.1 mg/L |
| Resolution | 0.01 mg/L |
| Response Time (t₉₀) | <60 s |
| Temperature Compensation | Integrated NTC thermistor |
| Operating Temperature | –10°C to +60°C |
| Storage Temperature | –10°C to +60°C |
| Pressure Rating | Up to 5 bar |
| Interface | Modbus RTU over RS-485 (standard), SDI-12 (optional) |
| Power Supply | 5–12 V DC |
| Current Consumption | 25 µA (standby), 4.4 mA (RS-485, 1 Hz), 7.3 mA (SDI-12, 1 Hz), 100 mA (pulse) |
| Dimensions | Ø25 mm × 146 mm (sensor + 3 m cable) |
| Weight | 450 g |
| Housing Material | Passivated 316L stainless steel or Grade 2 titanium |
| Protection Rating | IP68 |
| Certifications | ASTM D888-05 compliant |
| Data Logging | Onboard non-volatile memory for calibration history and measurement records |
| Brand | AMT (Germany) |
|---|---|
| Origin | Germany |
| Manufacturer Status | Authorized Distributor |
| Origin Category | Imported |
| Instrument Type | Online |
| Measurement Principle | Electrochemical (Polarographic Membrane-Type) |
| Accuracy | ±2% of reading |
| Power Supply | 9–30 VDC |
| Output Signal | 0–5 VDC |
| Dimensions | Ø25 mm × 240 mm |
| Air Weight | 260 g |
| Interface | SUBCONN BH-4-MP |
| Housing Material | Titanium & POM |
| Pressure Rating | 200 dbar (2000 m) or 600 dbar (6000 m) |
| Response Time (t₆₃%) | ~10 s |
| Dual-Membrane Configuration | Inner sensing membrane + outer protective membrane |
| Polarization Power Source | Integrated Li-ion battery (auto-disengaged when external power is applied) |
| Cable | Multi-core 4-wire marine-grade cable |
| Environmental Compatibility | Seawater, freshwater lakes & rivers |
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