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Water Quality Testing Equipment
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Water Quality Testing Equipment

Water quality testing equipment is essential for accurately assessing the chemical, physical, and biological characteristics of water across a wide range of applications, including environmental monitoring, wastewater treatment, drinking water analysis, aquaculture, and industrial process control. This product category includes a comprehensive selection of instruments designed to meet professional standards for precision, reliability, and compliance with international testing protocols.


Our offerings cover a full spectrum of parameters critical to water quality evaluation. Multiparameter Water Quality Meters provide efficient, all-in-one testing solutions for simultaneous measurement of pH, conductivity, dissolved oxygen, turbidity, and more. For field-based applications, Portable Water Quality Analyzers deliver real-time results in compact, rugged formats.

Key single-parameter instruments include COD Analyzer, Turbidity Meters (Turbidimeters), and Residual Chlorine Analyzer, each designed to meet specific regulatory and operational needs COD、NH3N、TP、TN Analyzer .

Platinum–Cobalt Colorimeter support rapid colorimetric analysis based on standard methods such as APHA platinum-cobalt, ideal for visual clarity and color contamination monitoring. Our Online Water quality instruments offer enhanced real-time monitoring and optimized data transmission, enabling faster, more reliable, and continuous water quality management.


Whether for regulatory compliance, environmental stewardship, or quality assurance, our water quality testing instruments are designed to deliver reliable data, streamline workflows, and support informed decision-making.


  • Multi-parameter Portable Water Quality Tester
    Portable Residual Chlorine, pH & Urea Water Quality Tester with OLED Display – Multi-Parameter Portable Water Analyzer for Environmental & Industrial Use
    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
     
    Model: PT-M900 (swimming pool model)
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  • Colony Counter
    Digital Colony Counter Series – Semi-Automatic Models PK-97SI & PLN-50S with LED Display and Probe Pen
    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
     
    Model: PK-97SI / PLN-50S
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  • Portable COD Analyzer With Digester
    Portable COD Analyzer PCOD-810 – Rapid Water COD Testing with Catalytic Digestion and Narrowband Optical System
    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
     
    Model: PCOD-810
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  • COD Analyzer PCOD-3M
    PCOD-3M COD Analyzer – Fast and Accurate Water COD Testing with Sealed Digestion and Touch Screen Display
    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
     
    Model: PCOD-3M
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  • Multi-parameter Water Quality Analyzer
    P Series Multi-Parameter Water Quality Analyzer | Residual Chlorine, Total Chlorine, Nitrite, Ammonia, Dissolved Oxygen Testing
    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
     
    Model: P series
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  • Water Environment Testing Machine
    Portable Multiparameter Water Quality Testing Machine – COD, Ammonia Nitrogen, Total Phosphorus, Total Nitrogen, Heavy Metals, IP65 Waterproof
    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
     
    Model: PY-65
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  • Multi-parameter Water Quality Analyser
    Multi-Parameter Water Quality Analyzer with IoT, 10-Inch Touchscreen for COD, Ammonia, Total Phosphorus & Nitrogen Testing
    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
     
    Model: PY-360
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  • Portable Water Quality Tester
    Portable Multi-Parameter Water Quality Tester for COD, Ammonia Nitrogen, Total Phosphorus & Total Nitrogen Analysis
    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
     
    Model: PY-880
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  • Portable Turbidimeter
    Portable Turbidimeter with Dual Detection | 0-20 NTU Range | Red Laser Light Source | IP65 Waterproof
    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
     
    Model: PY-260
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  • Residual chlorine detector (0-10mg/L)
    Portable Residual Chlorine Meter | DPD Photometric Water Quality Analyzer for Drinking, Swimming & Aquaculture Water
    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
     
    Model: PT-C10F
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To Make The World Closer To The Truth
ZHEJIANG TOP INSTRUMENT CO.,LTD., as a subsidiary of TOP Cloud agri, is a high-tech enterprise specializing in the R&D, manufacturing, sales for laboratory equipments, and provision of comprehensive laboratory solutions.

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