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Rat-TDO Portable Trace Dissolved Oxygen Analyzer
The Rat-TDO Portable Trace Dissolved Oxygen Analyzer is a high-precision instrument designed for ultra-low oxygen measurement in water and gas samples. Using the electrochemical polarographic method (Clark electrode), it delivers fast response, excellent stability, and wide-range detection from trace μg/L levels to mg/L concentrations. Its rugged IP67/IP68 waterproof design, dual measurement modes, automatic temperature and pressure compensation, and long battery life make it ideal for field monitoring, environmental testing, laboratory analysis, aquaculture control, and industrial process applications.
Key Features:
● High-precision trace oxygen measurement:
Detects dissolved oxygen from 0.10 μg/L to 20.0 mg/L with fast response and high accuracy for ultra-low oxygen monitoring.
● Advanced polarographic Clark electrode:
Generates diffusion current proportional to oxygen concentration, ensuring stable, reliable measurement in both liquid and gas samples.
● Automatic temperature and pressure compensation:
Built-in NTC temperature sensor and manual pressure compensation ensure accurate readings under varying environmental conditions.
● Dual measurement modes:
Supports dissolved oxygen concentration (mg/L, μg/L) and saturation (%) for flexible applications in water and gas analysis.
● Robust waterproof design:
Instrument rated IP67 and probe rated IP68, suitable for indoor, outdoor, and harsh field environments.
● Fast startup and simple calibration:
One-key air calibration and zero calibration streamline daily use and ensure long-term measurement stability.
● Large data storage and Bluetooth transfer:
Stores up to 999 readings on the device and support Bluetooth data transfer.
● Long battery life and multiple power options:
Powered by 4 × AA batteries or USB Type-C input, supporting up to 200 hours of continuous operation.
● Lightweight and portable:
Compact 390 g design with optional protective frame, flow cell, and carrying case for efficient field testing.
Technical Specifications
Parameter | |
Measurement Range | 0.10 μg/L–100 μg/L, 100 μg/L–20.0 mg/L (auto switch) |
Resolution | 0.01 μg/L; 0.01 mg/L |
Zero Drift | < 0.5 μg/L |
Accuracy | ±1% (FS) or ±0.5% |
Response Time | < 15 s |
Temperature Sensor | NTC thermistor; Accuracy: 0.1°C |
Calibration | Air slope calibration, zero calibration, pressure calibration |
Temperature Compensation | 0–50°C (automatic) |
Pressure Compensation | 0–200 kPa (manual) |
Salinity Compensation | 0.00–80.00 ppt (manual) |
Salinity Compensation Error | 2% |
Data Storage | 999 sets (mobile app: >100,000 records) |
Power Supply | 4 × AA batteries (1.5V × 4) or USB Type-C power input |
Battery Life | Up to 200 hours of continuous use |
Protection Rating | Instrument: IP67; Probe: IP68 |
Display | LED with backlight |
Dimensions (L × W × H) | 231 × 95 × 45 mm |
Total Weight | 390 g |
Storage & Transport Conditions | 5–45°C; ≤95% RH (non-condensing) |
Testing Conditions | Sample temperature: 0–45°C; Flow rate: 160–500 mL/min (constant) |
Comprehensive operating instructions and technical guidance are provided in the official user manual.
