Design: Portable aluminum alloy structure with 4.3-inch high-resolution color LCD touch screen
Detection Range: 0.10–5.00 mg/L; Transmittance: 0.00–100.00% (Resolution 0.01%, Accuracy ±2.0%)
Absorbance Resolution: 0.001; Transmittance Repeatability ≤0.2%; Stability ≤0.3% (3 minutes)
Functions: Intelligent input, automatic result saving, report printing, multi-curve calibration
Communication: RS232, USB with online data transfer and monitoring network function
Power Supply: AC 220V or rechargeable lithium battery
 

Supports detection of 20 water quality parameters including residual chlorine, total chlorine, ozone, pH, dissolved oxygen, ammonia nitrogen, phosphate, nitrate, hexavalent chromium, copper, etc.
Uses imported German high-brightness quasi-parallel LED cold light source and advanced optical design for high accuracy and stability
OLED high-definition display, easy operation with 5-button control, stores up to 5000 test results
IP65 protection rating, full plastic casing with anti-oxidation, acid and alkali resistance, and waterproof sealed design
Multi-wavelength detection at 420nm, 470nm, 520nm, and 620nm for versatile water quality analysis
Built-in 2500mAh lithium battery, supports charging via data cable and computer connectivity
Dimensions: 170×72×44mm; Weight: 277g; portable and lightweight design
 

Measures residual chlorine, total chlorine, chlorine dioxide, ozone, and pH
Detection range: residual chlorine 0-3 mg/L, total chlorine 0-5 mg/L, ozone 0-12 mg/L, chlorine dioxide 0-2.5 mg/L, pH 6.5-9.0
High-brightness quasi-parallel LED cold light source with German optical design
OLED display with user-friendly interface and manual data saving (up to 5000 results)
IP65 waterproof rating with durable, anti-corrosion plastic casing
Built-in 2500mAh rechargeable lithium battery, supports USB charging and PC connection
Absorbance range 0-3.0Abs, optical stability ≤±0.005Abs/30min
 

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