Detection Parameters: Residual Chlorine (0-3 mg/L), Urea (0-20 mg/L), pH (6.5-9.0)
Multi-wavelength Support: 420nm, 470nm, 520nm, 620nm for versatile parameter detection
Optical Performance: German advanced optical structure with quasi-parallel LED cold light source
Display & Storage: Clear OLED screen, manual save, stores up to 5000 test results
Durability: IP65 waterproof rating, plastic casing with anti-oxidation and acid-alkali resistance
Power: Built-in 2500mAh lithium battery, rechargeable via data cable
Size & Weight: 170×72×44mm, 277g — lightweight and portable for field use
 

Display digits: 0~999 
Counting signal: Buzzer/ Voice report number (Depend on models)
Diameter of culture dish (mm): 100
Upper light source power (W): LED2 for model PLN-50S
Lower light source power (W): 16
 

Function: Portable COD analyzer for rapid chemical oxygen demand testing in water samples
Measurement Range & Accuracy: COD 5–2000 mg/L, indication error ≤ ±5%, repeatability ≤3%, anti-chlorine interference ≤2000 mg/L
Digestion & Temperature Control: Sealed catalytic digestion, PID automatic temperature control, digestion time 10 min, ±1°C accuracy, adjustable 1–9999 min
Optical System & Data: Cold light narrowband interference system, absorbance drift <0.002A/20min, stores up to 199 COD values with timestamp, USB connection for data export
Power & Portability: Host powered by 4 AA batteries, digester 220V/12V or car cigarette lighter, optional emergency battery, main unit 0.5 kg, digester 1 kg
Display & Design: Large LCD screen, molded ABS chassis, IP65 waterproof and dustproof, optional printing function
 

Function: Portable COD analyzer for rapid chemical oxygen demand testing in water using sealed catalytic digestion and colorimetric measurement
Measurement Range & Accuracy: COD 5–2000 mg/L, indication error ≤ ±5%, repeatability ≤3%, anti-chlorine interference ≤2000 mg/L
Display & Operation: Color touch screen with Chinese/English display, user-friendly interface, one-key recovery, self-calibration, USB connectivity, batch volume 16 samples
Digestion & Temperature Control: Digestion temperature 165 °C, adjustable 1–9999 min, temperature control accuracy ±0.5 °C, optical stability absorbance drift <0.002A/20min
Data Storage & Printing: Stores up to 300 standard curves and 1000 measurements, supports printing of single/multiple page results
Power & Dimensions: AC 220V ±10%, <500W, main unit 5 kg, digestion instrument 5.5 kg, measuring instrument 400×310×158 mm, digester 355×260×135 mm
 

Test Method: Photoelectric colorimetric detection principle
Models: P9022 (2 parameters), P9025 (5 parameters), P9029 (9 parameters)
Parameters: Residual Chlorine, Total Chlorine, Combined Residual Chlorine, Chlorine Dioxide, Nitrite, Dissolved Oxygen, Ammonia Nitrogen, Iron
Measuring Range: 0–12 mg/L (depending on parameter); Minimum Indication: 0.001 mg/L
Accuracy: Linearity Error ±5% FS; Repeatability 2%
Features: Microcomputer with touch keyboard, backlight LCD display, multi-point curve calibration
Power Supply: AC 220V / 50Hz / 5W
 

Testing Parameters: COD (10–15000 mg/L), Ammonia Nitrogen (0.02–100 mg/L), Total Phosphorus (0.02–20 mg/L), Total Nitrogen (0.5–500 mg/L)
Detection Accuracy & Repeatability: ≤±5% accuracy, ≤±3% repeatability
Sample Capacity: 8 samples simultaneous digestion (dual temperature control)
Operating Temperature Range: 0–50°C, IP65 waterproof
Data Storage & Output: Stores up to 10,000 test results, real-time printing, USB data transmission
Power Supply: Built-in Li-ion battery or DC 12V adapter, up to 2 full test cycles per charge
Display: 7-inch touch-screen interface with intuitive operation
 

Testing items: COD, Ammonia Nitrogen, Total Phosphorus, Total Nitrogen
Detection range: COD 10-15000 mg/L; Ammonia 0.02-50 mg/L; Total Phosphorus 0.02-100 mg/L; Total Nitrogen 0.5-150 mg/L
Detection limit: COD 3 mg/L; Ammonia 0.005 mg/L; Total Phosphorus 0.005 mg/L; Total Nitrogen 0.2 mg/L
Measurement accuracy: ±5% or specified mg/L (varies per parameter)
Repeatability: ≤±3%
Display: 10-inch HD touchscreen with IoT remote viewing and DTU real-time data upload
Connectivity: Wi-Fi, Bluetooth printer support
 

Testing parameters: COD, Ammonia Nitrogen, Total Phosphorus, Total Nitrogen
Measurement range: COD 10-15000 mg/L, Ammonia Nitrogen 0.02-100 mg/L, Total Phosphorus 0.02-20 mg/L, Total Nitrogen 0.5-500 mg/L
Accuracy: ±5% for all parameters
Repeatability: ≤±3%
Digestion temperature: COD 165℃ for 20 min, Total Phosphorus 150℃ for 15 min, Total Nitrogen 125℃ for 30 min
Optical system: Imported high-brightness quasi-parallel LED cold light source with German optical design
Data storage: Up to 3000 test results, real-time data transmission and computer analysis support
 

Measurement Range: 0–20 NTU
Resolution: 0.001 / 0.01 / 0.1 NTU
Accuracy: ≤ ±0.05 NTU (<1 NTU), ≤ ±5% (≥1 NTU)
Detection Method: Dual detection with 90° scattered light and 180° transmitted light
Light Source: Red laser
Protection Class: IP65 waterproof
Power Supply: Lithium battery or optional dry cell
Dimensions & Weight: 170 × 72 × 44 mm, 290 g
 

Measurement Range: 0.00–10.00 mg/L residual chlorine
Accuracy: ≤ ±0.05 mg/L (<1 mg/L), ≤ ±5% (≥1 mg/L)
Wavelength: 520 nm, LED light source
Operation: Simple, intuitive display; fast analysis with low reagent use
Portability: Compact (128×70×48 mm), lightweight (188 g), IP65 protection
Battery Life: Over 24 hours continuous use
Principle: DPD spectrophotometric method