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Laboratory Water Purification
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Laboratory Water Purification

Laboratory water purification systems are essential for producing high-quality water required in a wide range of scientific, analytical, and industrial applications. From general-purpose pure water to ultra-high purity water used in sensitive procedures, reliable water purification is a critical part of maintaining accurate and reproducible results in the lab.


Our Laboratory Water Purification category covers a complete range of solutions to meet diverse water quality requirements:

  • Pure Water Systems
    Designed for routine laboratory tasks, these systems produce Type II or Type III water suitable for buffer preparation, media production, and general cleaning. They often integrate reverse osmosis, deionization, and activated carbon filtration to ensure consistent water quality.

  • Ultrapure Water Systems
    Engineered for applications that demand Type I water, including HPLC, molecular biology, and cell culture. These systems provide water with resistivity up to 18.2 MΩ·cm and low total organic carbon (TOC), supporting contamination-sensitive workflows.

  • Water Distillers
    Reliable and cost-effective solutions for producing distilled water in the lab. Available in single or double distillation configurations, they are ideal for applications that require stable water quality with minimal maintenance.

  • Reverse Osmosis Systems
    These systems serve as primary water treatment units, effectively removing ions, particles, bacteria, and organic compounds. Often used as a pre-treatment step for pure or ultrapure water production, reverse osmosis units ensure efficiency and extend the lifespan of downstream components.

  • Water Purification Accessories
    A full selection of essential components including replacement cartridges, UV lamps, pre-filters, storage tanks, and tubing. These accessories are designed to optimize performance, maintain compliance, and ensure the long-term reliability of your water purification systems.

  • Water Quality Monitoring Devices
    Accurate water quality control is critical for consistent laboratory results. We provide a range of conductivity meters, resistivity sensors, TOC monitors, and flow cells for real-time monitoring of purified water output, helping laboratories maintain high standards and meet regulatory requirements.


Whether you need purified water for basic laboratory operations or ultrapure water for high-precision analysis, our complete portfolio of laboratory water purification solutions ensures reliable performance and compliance with global laboratory standards.


  • 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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  • Laboratory Ultrapure Water Systems – 10L/20L Capacity with Online TOC Monitoring for Pharmaceutical & Semiconductor Applications
    Water Production Capacity: 10L, 20L models (varies by series)
    Water Quality: Resistivity ≥ 18.25 MΩ·cm, TOC <1-3 ppb, Microorganisms ≤ 1 cfu/mL
    Inlet Water Source: Urban tap water; TDS ≤ 100-400 ppm depending on model
    Water Purification Process: Pre-treatment, RO (single or dual stage), EDI, polishing mixed bed, with optional boron removal
    Power Supply: AC220V, 50Hz, <1KW
    Host Size: 960×540×1420 mm (all models)
    Applications: Suitable for biochemical reagents, pharmaceutical preparations, molecular biology, semiconductor labs, HPLC, ICP-MS, PCR, cell culture, and high-precision instrument water supply
     
    Model: Pure series
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  • High Capacity Laboratory Pure & Ultrapure Water Systems with TOC Online Monitoring – 150L to 400L per Hour
    Water production capacity: 150L, 250L, 400L per hour options
    Water source adaptability: Suitable for urban tap water with TDS ≥ 100 ppm (Pure-J, Pure-S) or < 100 ppm (Pure-Y)
    Multi-stage purification process: Pre-treatment + RO + EDI + polishing mixed bed + purification distribution
    Produced water quality: Resistivity ≥ 18.25 MΩ·cm, TOC < 1ppb (Pure-J & Pure-S) or < 3ppb (Pure-Y), Microorganisms ≤ 1 cfu/mL
    Equipped with real-time TOC online detection (range 0.05ppb - 2000ppb) and remote monitoring via APP
    Advanced safety and automation features: automatic flushing, water level interlock, pressure alarms, leakage protection
    Application scope: Biochemical, pharmaceutical, environmental monitoring, HPLC, PCR, molecular biology, and more
     
    Model: Pure series
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  • Portable Microbial Online Detection Instrument for Real-Time Water Quality Monitoring with 10,000 CFU Range
    Continuous microbial detection with 0–10,000 CFU/100ml range and 1 CFU precision
    Real-time results with 15-second frame response time and 10-minute initial response
    Portable design with 10-inch high-precision touchscreen and 32-bit data processor
    Suitable for purified water, ultrapure water, and water for injection (WFI)
    Data output via USB and 4-20 mA configurable analog signal
    Operating temperature range: 5°C–60°C; noise level ≤ 40dB(A)
    Stainless steel housing (40×40×25 cm), weighing 11 kg
     
    Model: P-CFU-1000A
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  • Portable TOC Online Detector for Pharmaceutical Purified Water – High Sensitivity Total Organic Carbon Analyzer with Touch Screen
    Measuring range: 0.05 ppb – 2000 ppb (μg/L)
    Detection limit: 0.03 ppb (μg/L) with 0.01 ppb resolution
    Accuracy: ±4%, repeatability ≤ 2%
    Sample temperature range: 1–50°C, flow rate 2–5 mL/min
    Initial response time: 60 seconds; single analysis time: 15 seconds
    Portable design with color touch screen and Chinese display
    Applications: Online & lab testing of pharmaceutical purified and injection water
     
    Model: P-TOC-50A
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  • Portable TOC Online Detector P-TOC-50AH for Pharmaceutical & Purified Water – High Accuracy, Fast Response, Touch Screen Display
    Portable TOC online detector with color touch screen
    Measurement range: 0.05–2000 ppb; detection limit: 0.03 ppb; resolution: 0.01 ppb
    High accuracy ±4%, fast response time: 60 seconds, single detection time: 15 seconds
    Suitable for high-temperature sample testing (1–100℃)
    No reagents or gas required, minimal maintenance, automatic alarm on exceeding preset limits
    Large data storage with test data export capabilities
    Applications: Pharmaceutical water, purified water, injection water, and cleaning validation
     
    Model: P-TOC-50AH
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  • Portable TOC Online Detector for Pharmaceutical & Purified Water | Real-Time Total Organic Carbon Monitoring with Touchscreen
    Real-time online TOC detection with measurement range 0.05–2000 ppb and detection limit 0.1 ppb
    Portable design with touchscreen interface and large data storage capacity
    No gas or reagents required, minimal maintenance with no moving parts
    Automatic alarm and control signal output when TOC exceeds set limits
    Suitable for pharmaceutical water, purified water, injection water testing, and environmental monitoring
    Flow rate: 2–5 mL/min; operating temperature: 1–50°C
    Compact size: 400×300×400 mm, stainless steel shell
     
    Model: P-TOC-50B
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  • Laboratory Ultrapure Water System with Self-Cleaning Filter & Real-Time Water Quality Monitoring | P-WP Series
    Water production rates: 10, 20, and 30 liters per hour
    RO membrane ion rejection rate: 97%-99%
    Total Organic Carbon (TOC): <10 ppb (standard), <3 ppb (low TOC models)
    Built-in 10μm stainless steel self-cleaning filter replaces traditional PP cotton
    Real-time online monitoring of water quality, pressure, and filter status with color touch screen
    Built-in 8L pressure water storage tank with antibacterial transparent inner pouch
    Low-voltage 24VDC power supply for safe operation in humid environments
     
    Model: P-WP series
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  • High-Quality Laboratory Ultrapure Water System with RO Membrane & Online Water Quality Monitoring, 10-30 L/H
    Water production rate: 10/20/30 liters per hour
    Ion rejection rate: 97%-99% (new RO membrane)
    UP water quality: Resistivity 18.25 MΩ·cm @ 25℃, TOC <10 ppb (standard), <3 ppb (low TOC model)
    Features online water quality monitoring, double water intake (RO & UP water)
    Automatic RO membrane anti-scaling flushing and multiple automatic water control functions
    Easy maintenance with Korean quick-insert filters and tool-free replacement design
    Equipped with 12L pressurized water storage tank and portable TDS pen
     
    Model: P-UPW series
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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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