CI-TP4800 Portable Dissolved Oxygen Analyzer CHANGAI
Working Principle
The measurement of dissolved oxygen is based on the Clark electrode principle, where a selective membrane separates the water sample from the electrode. Since oxidizing and reducing ions cannot pass through the oxygen-permeable membrane, no sample conditioning is required. When a constant voltage is applied across the two electrodes, dissolved oxygen is reduced at the platinum electrode (cathode) to form hydroxide ions.
Cathode: O + 2HO + 4e→ 4OH
The oxidation reaction takes place on the surface of the silver electrode (anode).
Anode: 4Ag + 4Cl → 4AgCl + 4e
The redox reaction generates a diffusion current, and the magnitude of the current is directly proportional to the dissolved oxygen concentration.
Features and Advantages
● High accuracy and high sensitivity: Detection limit down to 0.001 μg/L, with a resolution of 0.001 μg/L.
● Fast response and measurement: It generally takes only 3 minutes to measure from oxygen concentration in air down to the μg/L level.
● Simple operation and calibration: Measurement can be started immediately after power-on, without a long electrode polarization time.
● Long electrode life: The long service life reduces the cost of frequent electrode replacement.
● Long maintenance interval and low consumable cost: Electrode maintenance is required every 6 to 8 months under normal use, making maintenance simple and convenient.
● Low power consumption and long operating time: Powered by dry batteries, with continuous operation up to 1500 hours.
● High protection rating and user-friendly design: Fully waterproof body, magnetic attachment, compact and portable.
Specifications
| Item | Model | Measuring Range | Resolution | Accuracy | Response Time |
| CI-TP4800-S | 0.01 μg/L to 20 mg/L | 0.01 μg/L | ±1% FS or ±0.10 μg/L, whichever is greater | T90 < 10 s | |
| Portable | CI-TP4800 | 0.01 μg/L to 20 mg/L | 0.01 μg/L | ±1% FS or ±0.50 μg/L, whichever is greater | T90＜15s |
| Dissolved Oxygen | CI-TP4800-M | 0.1 μg/L to 20 mg/L | 0.1 μg/L | ±1.5% FS or ±1.0 μg/L, whichever is greater | T90＜20s |
| Analyzer | CI-TP4800-L | 1 μg/L to 20 mg/L | 1 μg/L | ±2% FS or ±5 μg/L, whichever is greater | T90＜30s |
| Temperature Sensor | NTC thermistor, measuring accuracy 0.1°C | ||||
| Sample Temperature | 0 to 50°C | ||||
| Sample Flow Rate | 150 to 500 mL/min | ||||
| Electrode Service Life | More than 5 years, depending on the sample | ||||
| Power Supply | Four AAA alkaline batteries, continuous operation up to 1500 hours | ||||
| Operating Conditions | Temperature 0 to 45°C; relative humidity not more than 90% | ||||
| Protection Rating | Instrument IP67; probe IP68 | ||||
| Dimensions | Instrument 164 mm (L) × 75 mm (W) × 17 mm (T) | ||||
| Weight | 300 g, including instrument, probe, and flow cell | ||||
After-sales Service Commitment: All purchased dissolved oxygen analyzers are covered by a one-year warranty for free replacement and repair of non-human-damaged parts and reagents, together with factory return technical service and abnormality analysis. We are committed to providing customers with accurate, convenient, and rapid testing solutions through our professional dissolved oxygen equipment.
Applications