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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 Dissolved Oxygen Meters, Turbidity Meters (Turbidimeters), and Chlorine Testers, each designed to meet specific regulatory and operational needs. COD and BOD Analyzers play a vital role in measuring organic pollution levels, while Heavy Metal Analyzers enable precise detection of toxic elements like lead, mercury, and arsenic in various water samples.

Colorimeters support rapid colorimetric analysis based on standard methods such as APHA platinum-cobalt, ideal for visual clarity and color contamination monitoring. Water Quality Test Kits offer simplified, cost-effective testing for routine checks in field and educational settings. For sample integrity and consistent results, Water Sampling Equipment ensures proper collection and handling protocols are followed. Additionally, Laboratory Water Quality Instruments provide high-precision bench-top solutions for research and advanced analysis in controlled environments.


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.


  • High-Precision Benchtop Turbidity Meter | PGZ Series Water Turbidity Analyzer with RS232 Interface
    Measuring Principle: 90° scattered light, direct turbidity reading
    Measuring Range: 0–10 / 0–100 / 0–1000 / 0–4000 NTU depending on model
    Minimum Readout: 0.001–0.01 NTU (model dependent)
    Accuracy & Repeatability: ±6% F.S, repeatability ≤0.5%, zero drift ±0.5% F.S
    Features: Microcomputer control, LCD backlit display, automatic multi-point calibration, average measurement mode, data storage and query, automatic/manual range switching
    Connectivity: RS232 data communication interface, optional built-in or external printer
    Additional: Optional spectrum measurement unit, flow sampling device, continuous measurement capability
     
    Model: PGZ-2000、2000A、4000、4000A100
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  • Handheld Digital Turbidity Meter | Portable Water Turbidity Analyzer for On-Site and Laboratory Testing
    Measuring Principle: 90° scattered light, direct turbidity reading
    Measuring Range: 0–20 NTU / 0–200 NTU (model dependent)
    Minimum Readout: 0.01 NTU or 0.1 NTU (depending on model)
    Accuracy: ±8% (±2.5% F.S); Repeatability ≤1%; Zero drift ≤±1% F.S
    Power Supply: AC 220/110V or DC operation with 5×AA alkaline batteries
    Features: LCD display, low power consumption, automatic shutdown, AC/DC dual power supply
    Compact & Lightweight: 235×75×65 mm design for portable use
     
    Model: PGA - B Series
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  • PGZ Series Benchtop Turbidity Meter | High-Precision Water Turbidity Analyzer for Laboratory and Industrial Applications
    Measuring Principle: 90° scattered light, direct turbidity reading
    Measuring Range: 0–10 / 0–100 / 0–500 / 0–1000 NTU (depending on model)
    Minimum Readout: 0.001 NTU or 0.01 NTU (model dependent)
    Accuracy: ±6% (±2% F.S); Repeatability ≤0.5%; Zero drift ≤±0.5% F.S
    Calibration: Automatic 1–5 point calibration with data smoothing and nonlinear processing
    Features: LCD backlight display, microcomputer control, data storage & query, RS232 interface; “P” models include built-in printer
    Applications: Waterworks, wastewater treatment, food & beverage, pharmaceuticals, hospitals, and environmental monitoring
     
    Model: PGZ Series
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  • PGZ-1000 Turbidity Meter | High-Accuracy Water Quality Testing Instrument with LCD Touch Screen
    Measurement Range: 0.00–1000 NTU with automatic range switching
    Resolution: 0.001 NTU; Repeatability ≤0.5%; Indication Error ≤±6%
    Light Source: 6V 10W tungsten halogen lamp (USEPA 180.1 compliant)
    Calibration: 1–8 points with Formazin standards or zero water
    Display & Storage: 7-inch LCD touch screen, stores up to 1000 sets of data (GLP-compliant)
    Interfaces: USB and RS232 for data output; reset function to factory default
    Dimensions/Weight: 430×430×300 mm / 9 kg
     
    Model: PGZ-1000
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  • PSZ-20D Portable Multi-Parameter Water Quality Analyzer | Field and Laboratory Water Testing Device
    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
     
    Model: PSZ-20D
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  • 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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  • 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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  • 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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  • 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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  • 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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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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