A reliable ISO direct manufacturer with CE ROHS certificate.     Please contact    WaterAnalyzer@probesti.com  WaterMonitor@probesti.com    Probest@Probest.cn

FAQ

  • Q Why need to monitor your supplier performance regularly?

    A

    To have suppliers with good performance is so important. 

     

    Nobody wants to work with an unreliable supplier. Keep tabs on your vendor to ensure they meet their commitments.

     

    Mostly we need our suppliers to provide qualified products, in time delivery. If you notice they regularly ship orders late, send incomplete orders, or provide low-quality goods, you can use this data to work with your supplier to improve processes in a mutually beneficial way.

     

    If that fails, you may have grounds to terminate your contract and cut ties with that supplier.

     

    This frees you up to start from scratch with a new (hopefully better) supplier.

     

    If you would like to find a better supplier in water analyzer monitoring instruments, please contact us PROBEST@PROBEST.CN or WaterMonitor@probesti.com

  • Q What is the Water analysis Monitoring instruments

    A
    Water analysis monitoring instruments, also known as water quality testing equipment or meters, are used to assess water quality by measuring various parameters such as pH, dissolved oxygen, conductivity, turbidity, COD, and concentrations of different chemicals and contaminants

    These sophisticated instruments are designed to measure physical, chemical, and biological parameters of water.

     Water quality analyzers are sophisticated instruments designed to measure various parameters in water, providing insights into its purity and safety. 
     
  • Q How to help to fix the water analyzer sensors problem

    A
    There are several key steps involved in resolving water analyzer sensor issues:

    1. Calibration: Regular calibration is critical because sensors can drift over time, resulting in inaccurate readings. Follow the manufacturer's specific instructions for the type of analyzer. For example, pH analyzers typically require calibration with a standard buffer solution. Be sure to use fresh calibration standard solutions and store them properly in a cool place away from light to prevent degradation.
    Sensor Cleaning: Sensor fouling from debris, minerals or biofilm can affect accuracy.

    2. Clean the sensor regularly using a method appropriate to the sensor type, such as brush cleaning, chemical cleaning, or ultrasonic cleaning. Avoid abrasive materials and check for signs of fouling during routine maintenance.

    3. Resolve electrical interference: Electrical interference can cause inaccurate readings. Identify potential sources of interference, such as nearby electrical equipment. If possible, locate the analyzer away from electromagnetic fields, ensure proper grounding, and consider using shielded cables to minimize interference.

    4. Check for loose connections and power supplies: Loose connections or unstable power supplies can cause problems. Ensure that all connections are secure and verify that the power supply is stable.
    Collect samples properly: Contaminated sample containers, inconsistent collection methods, delays between collection and analysis, and improper labeling can affect results.
    Use clean containers, maintain consistency in collection locations, and use proper labeling during collection.

  • Q What's the difference between DXC20 & UNI20 water transmitter

    A As to DXC20 & UNI20 water transmitters, both are with dual channels and signle channels for your choice. 

    With the same function, Single or Dual-channel transmitter, measured parameters include PH, DO, ORP, conductivity, turbidity, SS, chlorophyll, blue-green algae and other parameters. And realize the plug and play of the
    sensor, the configuration is flexible and convenient.
    Both with the same Features
    Achieve plug and play of sensors, quick and convenient electrode installation and replacement.
    Simple to use, reliable results, interface operation instructions can reduce operation errors.
    LCD screen visual operation, with Chinese and English bilingual navigation menu, rich and comprehensive interface content.
    With 4 ~ 20mA, MODBUS RS485 multiple data output methods.
    Automatically prompt error and alarm information, and realize the upload of alarm signal.
    The transmitter supports wall-mounted installation/panel installation/ pinch tube installation.
    Existing time display, data storage and historical data viewing functions.
    Optional data wireless transmission module.

    Diffence:
    DXC20 is neutral type for OEM, ODM. 
    UNI20 is with PROBEST logo, for our distributors. 
  • Q Does calibrating the pH electrode ensure accurate measurements?

    A Yes, to ensure accurate and precise pH measurements, in-line pH electrodes require regular calibration intervals that are dependent on the process conditions.

    A typical two-point calibration should be performed every two weeks using pH 4.01 and pH 7.00 technical buffers from Probest.

    The results of the calibration provide valuable information about the electrode’s health. The slope and offset values are then used to adjust the electrode for precise pH measurement until the next calibration is due.
  • Q What is the lifespan of a pH electrode?

    A
    Since pH is very much related to the place of use, pH electrodes are marketed as wearing parts without warranty.
     
    At the same time, the service life of in-line pH electrodes is largely dependent on the process conditions. pH electrodes have a service life ranging from a few days to more than a year without degradation of performance.

    However, exposure to highly alkaline process conditions and extreme temperatures can shorten the life of the electrode.

    We are pleased that the pH we sell at PROBEST, customer feedback has been used for over 6 years and is still good, my feedback has been used for over 2 years and is still good.
    Be sure to tell the APPLICATION of use and choose the right PH electrode.
  • Q How does a pH electrodes work?

    A A pH electrode works by measuring the difference in electric potential in mV between a glass membrane or X-Chip and the reference electrode in a solution.

    pH electrodes work by measuring the potential difference in mV between a glass membrane or X-chip and a reference electrode in a solution.
     
    The pH-sensitive portion of the electrode detects the activity of the hydrogen ions at its tip. The silver/silver chloride reference electrode is in contact with the solution through a septum or open junction, providing a stable reference potential. The pH value is then calculated from the potential difference using the calibration parameters of the pH sensor (stored on the sensor for digital ISM sensors and on the transmitter for analog pH sensors).

    Trust PROBEST chanagable PPH-500B ph online Sensor (Changable type) is your best choice for some cases. 
    And we also have other types for your choice, for the complex industry, also for the pure water test. 
     
  • Q Why Probest is with so many 10+ years colleagues?

    A
    Why we are happy to be a member of Probest Water Monitoring Sensors Factory?

    1. Because our team is united, we have a pretty good atmosphere.
     
    2. Because our boss is thinking about us and treating us like family. Probest is warm team.

    3. Because we always have the opportunity to learn so we can always grow.

    .......
    As we are enjoying our work, enjoying our life!
  • Q How does your company PROBEST ensure quality?

    A
    PROBEST strictly according to the following processes for each product produced by the company for quality control:
     
    First, ISO whole process quality control system, 6S management system
     
    1). Supply Chain Management
    Implementation of supplier certification system
    Dual-source supply strategy for key components
    Raw material batch traceability system
     
    2)Production process control
    A[Incoming Material Inspection] --> B[Process Inspection] --> C[SPC for Key Workstation] --> D[Aging Test] --> E[Final Inspection OQC].
    Establish quality gate control points (IQC/PQC/OQC)
    CPK requirements for key processes
    Implementation of “three inspection system” (self-inspection / mutual inspection / special inspection)
    Laboratory Assurance
    Regular calibration of testing equipment (MSA analysis)
    Retain all test raw data in ERP series
    All can be traced with SN
     
    Second, certification and standards compliance
    Mandatory certification: CE
    Enterprise standards industry standards: ISO (water quality instruments)
     
    Third, quality data visualization
    Establish real-time quality Kanban:
     
    Fourth, Continuous Improvement Mechanism
    PDCA cycle
     
    Fifth, Monthly quality analysis meeting
    8D report response time ≤72 hours
    Corrective action verification rate 100%
    Customer participation in improvement
    Establishment of customer quality committee
     
    Sixth, Integrity safeguard measures
    Welcome to the site random, sampling, monitoring
     
  • Q Quality control

    A Our pricing is based on high-quality raw materials and strict quality control. Compared with cheaper alternatives, our products ensure better durability and performance, which helps you reduce after-sales issues.
  • Q What are your contract principles? Does it support a long-term win-win cooperation model?

    A We PROBEST always adhere to the contractual principle of *"Fair and Mutual Benefit, Long-term Win-Win ”*.

    Whether as a supplier or a buyer, we are committed to building a transparent and balanced partnership to ensure that the interests of both parties are maximized.
  • Q What is the range of the PROBEST PUVCOD-900 instrument?

    A PROBEST PUVCOD-900 instrument has three different ranges base on different optical paths for your choice:

     COD (using KHP calibration)
    0~2000mg/l COD (2mm)
    0~1000mg/l COD (5mm)
    0~90mg/l COD (50mm)

  • Q What are the choices of materials for the contact parts of the PUVCOD instrument? Are they corrosion resistant?

    A
    We offer a variety of material configurations to suit different water quality environments for the PUVCOD-900. 
     
    Housing 316L stainless steel (standard), titanium alloy (high salt/strong acid environments) for salty-water. 
  • Q Is the PUVCOD tester optical type? What is its measuring principle?

    A Yes. PUVCOD is optical type. Optical measurements require no reagents and are easier to maintain, making them suitable for long-term online monitoring.

    Based on the UV absorption reaction by organic matter, the PUVCOD-900 Spectromete Organic  On-Line Analyzer uses the 254 nm spectral absorption coefficient SAC254 to measure the content of soluble organic compound in the water, and it can be converted to COD or BOD values under certain conditions. This method allows continuous monitoring without any reagents.

  • Q What does the Environmental Association do?

    A What does the Environmental Association do?

    As an authoritative certification service organization, the Environmental Association is always committed to providing professional and comprehensive certification services for enterprises. The scope of its audit is not only limited to quality management system, but also covers a wide range of fields such as environmental management, occupational health and safety, information security, etc., aiming to assess the comprehensive strength and compliance of enterprises in an all-round way.
    The strict audit by the Environmental Association further confirmed the reliability of PROBEST's factory in production management, quality control and compliance operation, especially in the field of research and development and production of water quality analyzers, PROBEST has shown excellent technical strength and rigorous production attitude, which fully reflects its professionalism as a high-quality production enterprise.
  • Q Why choose Probest a Direct Factory as Long-term Partner?

    A

    Choosing a factory as a long-term partner over a trader company can offer several advantages, especially if you are a professional sourcing agent. Here are some key reasons why you might prefer a factory:

    1. Cost Efficiency

    • Lower Costs: Factories typically offer lower prices because you are buying directly from the manufacturer, eliminating the middleman (trader) markup.

    • Transparent Pricing: You can often negotiate better terms and understand the cost structure more clearly when dealing directly with a factory.
       

    2. Quality Control

    • Direct Oversight: Working directly with a factory allows you to have more control over the production process, ensuring that quality standards are met.

    • Customization: Factories are usually more flexible when it comes to customizing products to meet specific requirements.
       

    3. Production Capacity

    • Scalability: Factories generally have the capacity to scale production up or down based on your needs, which is crucial for long-term partnerships.

    • Consistency: Direct access to the production line ensures that you can maintain consistent quality and supply over time.
       

    4. Communication and Relationship Building

    • Direct Communication: Dealing directly with the factory reduces the risk of miscommunication and allows for quicker resolution of issues.

    • Stronger Relationships: Building a direct relationship with the factory can lead to better cooperation, trust, and long-term collaboration.
       

    5. Innovation and Development

    • R&D Collaboration: Factories often have R&D departments that you can collaborate with to develop new products or improve existing ones.

    • Technological Advancements: Factories are usually at the forefront of technological advancements in their field, which can be beneficial for your product line.
       

    6. Supply Chain Control

    • Transparency: You have better visibility into the supply chain, which can help in managing risks and ensuring timely delivery.

    • Logistics: Direct coordination with the factory can streamline logistics and reduce lead times.
       

    7. Compliance and Certifications

    • Regulatory Compliance: Factories are more likely to have the necessary certifications and comply with industry standards, which is crucial for certain markets.

    • Ethical Standards: Direct oversight ensures that ethical and environmental standards are met, which is increasingly important to consumers.
       

    8. Long-Term Strategic Partnership

    • Joint Growth: A long-term partnership with a factory can lead to joint growth opportunities, such as co-branding or exclusive product lines.

    • Stability: Factories are generally more stable and reliable partners compared to traders, who may switch suppliers frequently.
       

    9. Risk Management

    • Lower Risk: Dealing directly with a factory reduces the risk of fraud or misrepresentation, which can be higher with traders.

    • Contingency Planning: Factories are better equipped to handle disruptions and can work with you to develop contingency plans.
       

    10. Intellectual Property Protection

    • Confidentiality: Factories are often more willing to sign non-disclosure agreements (NDAs) and protect your intellectual property.

    • Control: You have more control over the production process, reducing the risk of your designs or technologies being copied.

      That's why we need to find a factory as our partner, Probest is your best choice for water monitoring analyzer. We can also offer fast delivery, fast team service and quality control. Contact PROBEST. 

  • Q How to monitor COD? What is the Role of Water Quality Instruments?

    A

    Water quality instruments are automated devices that continuously monitor Chemical Oxygen Demand (CODmn), a measure of organic pollution in water. They use advanced techniques like UV absorption or laser spectroscopy to estimate CODmn, providing real-time data for industrial or environmental monitoring.
    These instruments are precise and reduce manual labor, making them suitable for settings like wastewater treatment plants. However, they are costly and require regular maintenance.

    For example, the COD analyzer by PROBEST offers constant online measurement, supporting wastewater treatment monitoring.

    How Do Colorimetric and Titration Methods Measure CODmn?

    Colorimetric Method: This involves reacting a water sample with potassium permanganate (KMnO4). After the reaction, the color intensity of the remaining KMnO4 is measured using a spectrophotometer, determining the CODmn from the color change. It's simple and quick but can be less accurate due to interference from the sample's color or turbidity, as noted in a study using N,N-diethyl-p-phenylenediamine for measurement.

    Titration Method: Here, the water sample is reacted with KMnO4, and the remaining KMnO4 is titrated with a standard reducing agent, like sodium oxalate, to calculate the amount consumed, reflecting CODmn. This method is highly precise but time-consuming and requires skilled operators, as described in standard methods.

    What Are the Differences Between These Methods?

    These methods differ in automation, precision, speed, and suitable scenarios:

    Automation vs. Manual Operation: Water quality instruments are automated, ideal for continuous monitoring, while colorimetric and titration methods are manual, requiring laboratory setup.

    Precision: Titration offers the highest precision, water quality instruments provide good accuracy depending on technology, and colorimetric is less precise due to potential interferences.

    Speed: Instruments deliver the fastest results, colorimetric is quicker than titration but still needs preparation, and titration is the slowest.

    Suitable Scenarios: Instruments are best for real-time industrial or environmental monitoring, colorimetric suits routine lab testing where speed matters, and titration is used in research or regulatory compliance needing high precision.

  • Q How to find a reliable long-term cooperation partner?

    A Building trust over time by consistently meeting obligations, being transparent, and showing commitment. Trust isn't built overnight, so patience is necessary. 

    To find a reliable long-term cooperation partner, follow this structured approach:
     
    1. Define our Needs and Values
    Clarify Objectives: Identify our business goals, required resources, and the specific skills we seek in a partner.
     
    Align Values: Prioritize partners who share your core values (e.g., integrity, innovation) to ensure cultural compatibility.
     
    2. Source Potential Partners
    Networking: Attend industry events, via google, via LinkedIn. Visit website. 
     
    Referrals: Seek recommendations from trusted contacts to pre-vet candidates.
     
    Industry Presence: Target organizations with strong reputations and thought leadership in your field.
     
    3. Vet Candidates Thoroughly
    Track Record: Review case studies, client testimonials, and past collaborations. Google, linkedIn are the best way to audit. 

    Probest is a direct factory, Believe in karma and credit first! Contact us.
  • Q Detailed product knowledge about water quality analyzer

    A
    Water quality analyzer is a kind of equipment used to monitor and measure various chemical and physical parameters in water, which is widely used in many fields, such as environmental protection, water treatment, water industry and so on. The following is the detailed product knowledge about water quality analyzer:
     
    Classification and function
    Water quality analyzer is divided into multi-parameter tester MP301 MUC200 and single-parameter tester according to its function. Multi-parameter analyzer can simultaneously measure a variety of water quality parameters, such as pH, dissolved oxygen, conductivity, turbidity, etc., while the single-parameter analyzer focuses on a single parameter measurement. 
    As to parameters, such as the Dissolved Oxygen Meters, Do Sensor, UVCOD BOD sensors, NH4H Sensor, Turbidity Sensor, Residual Chlorine Analyzer, Total Chlorine Analyzer, Turbidity Meter, TP, TN ect..
  • Q What applications can PROBEST's water quality analyzers be used for?

    A
    Water Monitoring Analysis Applications:

    Water source monitoring: to ensure the safety of drinking water

     
    Environmental protection monitoring station: monitoring environmental water quality
     
    Municipal water treatment process: monitor water quality treatment effectiveness
     
    Municipal water quality monitoring: ensuring the quality of water supply
     
    Rural tap water monitoring: ensuring rural drinking water safety
     
    Circulating cooling water management: widely used in industrial cooling systems
     
    Swimming pool water management: ensuring water safety in swimming places
     
    Factory aquaculture: monitoring water quality to optimize the aquaculture environment, etc.

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