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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.


  • PT-D300J Pen-Type Dissolved Oxygen Meter | Portable DO Tester with Temperature Compensation for Water Quality Analysis
    Dissolved Oxygen Range: 0.00–20.00 mg/L (0.0–200.0%)
    Resolution & Accuracy: 0.01 mg/L; ±0.05 mg/L
    Temperature Range: 0.0–100.0℃, Accuracy ±0.2℃
    Compensation: Automatic temperature, salinity (0–40 g/L), and atmospheric pressure (700–1400 mbar)
    Calibration: 1 or 2 points (100% saturated oxygen / 0% oxygen-free)
    Power Supply: 1 × 1.5V AAA battery, easy replacement
    Waterproof Rating: IP65, portable pen-type design
     
    Model: PT-D300J
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  • Online UV COD TOC Turbidity Sensor | RS485 MODBUS Water Quality Analyzer with Automatic Cleaning
    COD Range: 0–600 mg/L (±5% F.S, 0.1 mg/L resolution)
    TOC Range: 0–240 mg/L (±5% F.S, 0.1 mg/L resolution)
    Turbidity Range: 0–300 NTU (±5% F.S, 0.1 NTU resolution)
    Light Source: 254nm UV-LED with 365nm turbidity compensation
    Interface: RS-485 MODBUS, 4–20mA output
    Operating Conditions: 5–40℃, max depth 10m, IP68 protection
    Installation: Flow cell or submersible mounting, 10m cable
     
    Model: TUV254
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  • PT-DE26 Online Conductivity Sensor – RS485/MODBUS, Temperature Compensated, IP68 Waterproof, 0–200 mS/cm
    Measuring Range: 0–20 mS/cm, 0–200 mS/cm | Accuracy: ≤±1% | Response Time: ≤15 s
    Measured Variables: Conductivity, Resistivity, TDS, Salinity | Temperature Range: 0–60℃, Accuracy: ≤±0.3℃
    Built-in temperature sensor with automatic water temperature compensation
    Digital Output: RS-485, MODBUS-RTU; Two-way communication, low power consumption (0.5 W)
    Construction: Graphite electrode, ink/epoxy/ABS housing, 316L liquid connection, IP68 waterproof
    Installation: Flow-through tank, pipe, or sink mounting; Coaxial design ensures stability and anti-interference
    Power Supply: 12–24 VDC; Cable length: 5 m standard, customizable
     
    Model: PT-DE26
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  • PT-DH320 Online Water Hardness Sensor – Digital ISE Ion Sensor, High Accuracy, RS485/MODBUS, IP68 Waterproof
    Measurement Range: 0.2–40000 ppm, Resolution: 0.001 mg/L, Accuracy: ±5% F.S
    Temperature Range: 0–50℃, Resolution: 0.1℃, Accuracy: ±0.5℃, Automatic Temperature Compensation
    Digital Output: RS485, MODBUS-RTU; Easy integration with PLCs, computers, and IoT systems
    Two-point calibration; Adjustable slave address, baud rate, range, and coefficients online
    Housing Material: PPS, ABS, PC+Stainless Steel; Protection Grade: IP68
    Installation: Flow cell, Submerged, 3/4″ NPT threads; Cable length: 5 m
    Low power consumption: <1 W; Compact dimensions: Φ39×205 mm
     
    Model: PT-DH320
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  • PT-DpH07 Online pH Composite Electrode – High Accuracy, Fast Response, IP68 Waterproof, MODBUS/RS485, 0-14pH
    Measurement Range: 0.00–14.00 pH, Accuracy: ≤±0.02 pH, Resolution: 0.01 pH
    Response Time: 20 sec; Drift: ≤±0.1 pH/24h; Sensitive Membrane Impedance: ≤500 MΩ
    Stable reference system: Ag/AgCl with gel electrolyte, excellent anti-pollution performance
    PTFE diaphragm for long-term online monitoring without clogging
    Operating Temperature: 0–60℃, Waterproof Rating: IP68
    Output Mode: MODBUS / RS-485, Power Supply: 12–24 VDC, Rated Power: <0.5 W
    Installation: 3/4″ NPT Thread, suitable for online water quality monitoring
     
    Model: PT-DpH07
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  • PT-DN85 Online Ammonia Nitrogen Sensor – Real-Time NH4-N Monitoring, Reagent-Free, Self-Cleaning, MODBUS/RS485, IP68
    Measurement Range: 0–100 mg/L NH4-N, Accuracy: ±10% or ±0.5 mg/L, Resolution: 0.01 mg/L
    pH Range: 0–10, Accuracy: ±0.1 pH, Resolution: 0.01
    Automatic compensation: pH, temperature, optional potassium ion
    Housing Material: POM, compact, corrosion-resistant; Protection Class: IP68, Maximum depth: 10 m
    Self-cleaning brush for low maintenance and long-term reliability
    Digital Output: RS-485, MODBUS protocol, strong anti-interference signal
    Power Supply: 12VDC±20%, Current <100 mA (<200 mA during cleaning), Cable Length: 10 m (customizable)
     
    Model: PT-DN85
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  • ORP Sensor Electrode PT-DR31 – Online Oxidation-Reduction Potential Measurement, MODBUS/RS485, IP68 Waterproof
    Measurement Range: -2000 to 2000 mV, Accuracy: ±15%, Resolution: 1 mV
    Electrode Material: PTFE anti-fouling, Platinum, PC housing
    Gel electrolyte resists interference from external ions and pressure changes
    Digital output: MODBUS/RS485; Calibration: One-point calibration
    Installation: 3/4″ NPT Thread, Cable length: 5 m (customizable)
    Operating Temperature: 0–60℃, Waterproof Rating: IP68
    Low power consumption: <0.5 W
     
    Model: PT-DR31
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  • Online Turbidity & Suspended Solids Sensor PT-DX01 – High Accuracy, MODBUS/4-20mA Output, IP68 Submersible
    Measurement Range: 0–200 / 0–1000 / 0–3000 mg/L (choose model)
    Resolution: 0.01–1 mg/L; Accuracy: ≤±0.3–0.5 mg/L or ≤±6–8%
    Installation: Flow cell or submerged, Maximum depth 5 m
    Interfaces: MODBUS/RS-485 digital, 4–20 mA analog output
    Intelligent cleaning & temperature compensation for reliable operation
    Electrode Material: 316 stainless steel, Protection Class: IP68
    Dimensions: φ54×150 mm, Cable length: 5 m (default)
     
    Model: PT-DX01
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  • Fluorescence Dissolved Oxygen Sensor – IP68 Waterproof, MODBUS/RS485, Maintenance-Free for Aquaculture & Environmental Monitoring
    Measuring Range: 0–20 mg/L or 0–200% saturation, Accuracy: ±0.3 mg/L or ±5%
    Fluorescence burst principle, green LED excitation, maintenance-free, no oxygen consumption
    Built-in temperature sensor with automatic compensation, Response Time: 90s
    Communication: MODBUS/RS485; intelligent diagnostic outputs
    Material: 316L stainless steel, IP68, max depth 10 m underwater, easy installation
    Power: 12–24V DC, Power Consumption: 0.3 W
    Calibration: Zero, Oxygen Saturation, Low Concentration, Slope Calibration
     
    Model: PT-DY05
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  • PT-DZ09 Digital Turbidity Electrode, 0–3000NTU, IP68 Waterproof, MODBUS/RS-485, Automatic Cleaning, Lab & Water Monitoring
    Measurement Principle: 90° scattered light method with near-infrared LED
    Turbidity Range: 0–3000 NTU (model-dependent: 0–20, 0–200, 0–1000, 0–3000 NTU)
    Accuracy & Resolution: High precision, resolution 0.01–1 NTU, accuracy ±0.3–8% depending on range
    Outputs & Interface: MODBUS/RS-485 digital interface, 4–20mA analog output
    Durability: IP68 waterproof, corrosion-resistant 316 stainless steel, suitable for long-term submerged use
    Additional Features: Built-in temperature sensor, automatic cleaning wiper, optional flow cell
    Installation & Power: 3/4″ NPT thread or flow-through mounting, 12VDC power supply, cable length 5 m
     
    Model: PT-DZ09
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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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