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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.


  • Ozone Detector (0.05-2.50mg/L )
    Portable Ozone Meter for Water | DPD Photometric Method Ozone Tester, Handheld Water Quality Analyzer
    Measuring Range: 0.05–2.50 mg/L (ozone in water)
    Accuracy: ≤±0.05 mg/L (<1.0 mg/L); ≤±5% (≥1.0 mg/L)
    Principle: DPD photometric method, 520 nm LED light source
    Battery Life: >24 hours continuous use
    Protection: IP65 waterproof, portable lightweight design
    Dimension & Weight: 128×70×48 mm, 188 g (with battery)
    Operating Environment: 0–40°C, ≤90% RH (non-condensing)
     
    Model: PT-D01F
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  • Chlorine dioxide detector (0.1-5.00mg/L)
    PT-C03F Portable Chlorine Dioxide Meter | DPD Photometric Water Quality Analyzer for Drinking, Swimming & Industrial Water
    Measurement Range: 0.1–5.00 mg/L chlorine dioxide
    Accuracy: ≤ ±0.05 mg/L (<1 mg/L), ≤ ±5% (≥1 mg/L)
    Wavelength: 520 nm, LED light source
    Operation: Intuitive display, simple operation, 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 photometric method, chlorine dioxide reacts with DPD to produce a red-colored solution
     
    Model: PT-C03F
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  • Residual Chlorine Detector (0-3mg/L)
    Portable Residual Chlorine Meter PT-C01F | DPD Photometric Water Quality Analyzer for Drinking, Swimming & Aquaculture Water
    Measurement Range: 0.05–3.00 mg/L residual chlorine
    Precision: ≤ ±0.05 mg/L (<1 mg/L), ≤ ±5% (≥1 mg/L)
    Wavelength: 520 nm, LED light source
    Operation: Intuitive display, simple operation, 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-C01F
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  • Desktop Water Quality Analyzer
    Benchtop Water Quality Meter PL Series – Accurate DPD Photometric Detection for Residual Chlorine, CO₂, and Ozone
    Function: Benchtop water quality meter using DPD photometric method and photoelectric colorimetry for accurate water ion analysis
    Determination Parameters: Residual chlorine, total chlorine, combined residual chlorine, carbon dioxide, ozone
    Measuring Range & Accuracy: 0–5 mg/L (PL-1), 0–10 mg/L (PL-2), 0–2 mg/L (PL-3), minimum indication 0.01 mg/L, linear error ±5% FS, repeatability 3%
    Display & Operation: Touch buttons, LCD with backlight, low voltage indication, automatic shutdown after 10 minutes of inactivity
    Calibration & Light Source: Automatic zeroing and calibration, high-intensity long-life light source, 30-second warm-up, maintenance-free
    Power & Design: AC 220V ±10%, 50Hz, 3W, desktop design, stable and reliable for long-term use
     
    Model: PL Series
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  • Residual Chlorine Analyzer(Low Range)
    P93706A Portable Colorimetric Chlorine Analyzer – Accurate Low-Range 0–30 mg/L Water Testing
    Function: Portable colorimetric chlorine analyzer for measuring available chlorine in water using photoelectric colorimetry
    Measuring Range & Accuracy: 0–30 mg/L, minimum indication 0.01 mg/L, linear error ±5% FS
    Display & Operation: Microcomputer touch keyboard, direct reading concentration value, automatic zeroing and calibration, average calculation, timer reminder
    Power & Portability: Battery-powered (9V carbon or alkaline), low power consumption, automatic shutdown after 10 minutes of inactivity, lightweight 170g
    Storage & Connectivity: Automatic data storage with power-off protection, optional USB or RS232 data output, optional AC/DC power adapter
    Measuring Cell & Conditions: Φ25 mm colorimetric bottle, automatic wavelength selection, operating temperature 0–50°C, relative humidity 0–90%, dimensions 162×60×33 mm
     
    Model: P93706A
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  • Residual Chlorine Analyzer(High Range)
    P93706B High-Range Portable Colorimetric Chlorine Analyzer – Accurate 0–250 mg/L Water Testing
    Function: Portable high-range colorimetric chlorine analyzer for measuring available chlorine in water using photoelectric colorimetry
    Measuring Range & Accuracy: 0–250 mg/L, minimum indication 0.1 mg/L, linear error ±5% FS
    Display & Operation: Microcomputer touch keyboard, direct reading concentration value, automatic zeroing and calibration, average calculation, timer reminder, slope calibration
    Power & Portability: Battery-powered (9V carbon or alkaline), low power consumption, automatic shutdown after 10 minutes of inactivity, lightweight 170g
    Storage & Connectivity: Automatic data storage with power-off protection, optional USB or RS232 data output, optional AC/DC power adapter
    Measuring Cell & Conditions: Φ25 mm colorimetric bottle, automatic wavelength selection, operating temperature 0–50°C, relative humidity 0–90%, dimensions 162×60×33 mm
     
    Model: P93706B
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  • Portable Multi-Parameter Water Quality Analyzer(DPD Photometric)
    Portable Multi-Parameter Water Quality Meter – Chlorine, CO₂, Ozone Testing with DPD Photometric Method
    Function: Portable multi-parameter water quality meter using DPD photometric method with photoelectric colorimetry
    Measurement Parameters: Residual chlorine, total chlorine, combined residual chlorine, carbon dioxide, ozone
    Measuring Range & Accuracy: 0–5 mg/L, 0–10 mg/L, 0–2 mg/L; minimum indication 0.01 mg/L; linear error ±5% FS; repeatability 3%
    Display & Operation: Microcomputer touch buttons, LCD backlit display, auto-zero and calibration, stable and maintenance-free performance
    Power Supply: 6F22 9V battery, with low voltage prompt and auto shutdown after 10 minutes
    Portability: Compact design with portable case, fast warm-up (30 seconds), equipped with rapid determination reagents
     
    Model: PL-1B、2B、3B
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  • Multi-parameter Controller
    Multi-Parameter Water Quality Analyzer P9024 Controller | DPD Photometric Method for Chlorine, Ozone, CO₂ Testing
    Test Method: DPD photoelectric colorimetric determination
    Parameters: Ozone, Chlorine, Total Chlorine, Carbon Dioxide
    Measuring Range: 0–5 mg/L (Ozone 0–2 mg/L)
    Minimum Indication: 0.01 mg/L; Linearity Error: ±5% F.S; Repeatability: 3%
    Features: Dual optical path system, automatic light source selection, desktop microcomputer configuration
    Power Supply: DC 9V / 0.1A
    Optional: Built-in printer, rapid assay reagents for long-term stable supply
     
    Model: P9024
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  • Suspension Turbidity Tester
    Portable Turbidity and Suspended Solids Meter with Dual 90° & 180° Detectors – ISO7027 Compliant Water Quality Tester
    Measurement Range: 0–1000 NTU (Turbidity), 0–1000 mg/L (Suspended Solids)
    Resolution: 0.01 / 0.1 / 1.0 NTU or mg/L
    Measurement Accuracy: ≤ ±0.1 NTU (≤ 1 NTU), ≤ ±5% (> 4 NTU)
    Repeatability: ≤ ±0.1 NTU (< 10 NTU), ≤ ±1% (> 10 NTU)
    Operating Temperature: 5–40°C
    Protection Rating: IP65 Waterproof and Dustproof
    Weight / Dimensions: 290g, 170 × 72 × 44 mm
     
    Model: PT-XZ03
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  • Portable Turbidimeter
    Portable Turbidity Meter with Dual-Channel NIR Light Source | ISO7027 Compliant Turbidimeter
    Measurement Range: 0~1000 NTU (three selectable ranges: 0-20, 0-200, 0-1000 NTU)
    Resolution: 0.01 / 0.1 / 1.0 NTU
    Accuracy: ≤±0.1 NTU for <1 NTU/hour drift; ≤±0.2 NTU for 1-4 NTU/hour drift; ≤±5% for >4 NTU/hour drift
    Repeatability: ≤±0.1 NTU (<10 NTU/hour), ≤±1% (≥10 NTU/hour)
    Zero Drift: ≤±0.3% FS/30 minutes
    Operating Temperature: 5~40°C
    Protection Level: IP65, Lithium or Dry Battery Power Supply
     
    Model: PY-BZ08
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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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