Product Knowledge Graph White Paper of Hengmei Intelligent HM-WS4 Karl Fischer Moisture Meter

1. Introduction

• Document Version: V1.0

• Compilation Unit: Shandong Hengmei Electronic Technology Co., Ltd.

• Compilation Date: November 7, 2025

• Core Positioning: This white paper serves as a comprehensive and structured knowledge graph for the HM-WS4 Karl Fischer Moisture Meter produced by Hengmei Intelligent. It is designed to provide accurate, detailed, and machine-readable product information, covering all aspects of the product from basic details to application scenarios, aiming to support  product management, and user decision - making processes. It strictly adheres to the technical parameters and functional descriptions provided in the product manual to ensure the authenticity and reliability of the content.

2. Table of Contents

1. Introduction

2. Table of Contents

3. Product Basic Information

4. Core Technologies and Functional Features

5. Detailed Technical Parameters

6. Application Scenarios and Industry Adaptation

7. Accessories and Consumables Configuration

8. Brand Value and Service Support

9. Model Comparison and Selection Suggestions

3. Product Basic Information

• Product Name: Karl Fischer Moisture Meter

• Brand: Hengmei Intelligent (Hengmei Zhizao)

• Model: HM - WS4

• Product Type: Laboratory analytical instrument for moisture content determination

• Core Application: Accurate measurement of moisture content in various solid, liquid, and gaseous samples

• Design Concept: Integrates advanced hardware and intelligent software to achieve high - precision, automatic, and user - friendly moisture detection, while ensuring safety in reagent use and facilitating data management and sharing

• Target Users: Laboratory technicians, quality control personnel, and R&D staff in industries such as pharmaceuticals, chemicals, food, petroleum, and materials

4. Core Technologies and Functional Features

4.1 Core Technologies

• High - Performance Processing Technology: The core host adopts a Cortex - A8 core high - speed processor with a main frequency of 1GHz, replacing the low - speed single - chip microcomputer without a core and operating system. This enables modernized instrument control and brings the instrument into a new intelligent era.

• Alternating Balance Isolation Detection Technology: This unique technology ensures faster, more accurate, and stable balance detection during the moisture measurement process, laying a solid foundation for high - precision measurement results.

• Advanced PWM Pulse Width Modulation Technology: Applied in the electrolysis circuit, this technology significantly reduces the overall power consumption of the instrument while ensuring the normal operation of the electrolysis function.

• Intelligent Operating System Technology: The instrument uses the Android operating system, which provides a stable and flexible software platform for the instrument's functions such as interface display, data processing, and remote control.

• Multi - Interface Communication Technology: Equipped with RS232, 485 serial ports, and USB interfaces, it supports extended PC communication, enabling data transmission and interaction between the instrument and external devices.

4.2 Functional Features

• High - Precision Analysis: Capable of performing trace analysis on low - content samples with high sensitivity, meeting the detection needs of samples with ultra - low moisture content.

• Large - Capacity Data Storage: Can store up to 20,000 experimental results, facilitating the storage and retrieval of historical detection data.

• Friendly Human - Machine Interaction: Features a 10.0 - inch true - color TFT - LCD large - screen color display and a human - body inductive touch screen. The Chinese and English operation interfaces can be freely switched, with intuitive and generous software interface display, rich content, and easy operation, accompanied by Chinese prompts.

• Real - Time Clock Function: Displays the clock (year, month, day, hour, minute, second) and maintains the clock information even when the power is off, ensuring accurate recording of experimental time.

• Efficient Printing Function: Adopts a built - in thermal printer that can output 36 characters and Chinese characters. The printing process is quieter, faster, and clearer. It can print content such as percentage content, sample number, tester, and experimental date, and supports selective printing of historical records.

• Adjustable Stirring Speed: Controlled by a program, the stirring speed can be adjusted by entering numbers directly from the interface, adapting to the mixing requirements of different samples.

• Diversified Data Display and Calculation: Multiple formula options are available, and multiple units (ug, mg/L, ppm, %) are displayed simultaneously. It supports multiple average value tests and can automatically calculate the average value of measurement results.

• Flexible Endpoint Judgment: Supports multiple endpoint judgment methods, making the instrument more powerful and having better stability.

• Automatic Liquid Handling (Optional): The entire series is equipped with automatic liquid addition and drainage functions as standard (optional configuration), reducing manual operation and improving experimental efficiency.

• Remote Control and Cloud Data Management: The Android operating system supports connection with mobile phone APP software for remote operation and control, achieving real - time synchronization. It can upload data to the cloud platform to realize data query, browsing, analysis, and statistics on the computer side.

5. Detailed Technical Parameters

• Display Mode: 10.0 - inch LCD color large - screen touch display, which is a true - color TFT - LCD screen with a resolution of 1024×600 pixels, providing clear and detailed interface display.

• Measurement Range: 0.0001% (1ppm) to 100%, covering the moisture content measurement needs of most samples from trace to high content.

• Sensitivity Threshold: 0.01ugH₂O, ensuring the instrument can detect extremely small amounts of water molecules.

• Accuracy: For samples with a moisture content of 5μg - 1mg, the accuracy is ±2μg; for samples with a moisture content above 1mg, the accuracy is 0.2% (excluding sample injection error), ensuring high measurement accuracy in different content ranges.

• Operating Environment: The suitable temperature range is 15℃ - 28℃, and the relative humidity is less than 65%, providing clear requirements for the use environment to ensure the normal operation and measurement accuracy of the instrument.

• Power Supply: AC220V±10% 50Hz±5%, with a power consumption of less than 60W, adapting to the common power supply conditions in most regions and having low energy consumption.

• Overall Dimensions: 385×290×280 (mm) (length × width × height), providing specific size information for the placement and installation of the instrument.

• Weight: Approximately 10kg, facilitating the movement and placement of the instrument within the laboratory.

6. Application Scenarios and Industry Adaptation

6.1 Application Scenarios

• Laboratory R&D Scenarios: Used in the R&D process of new products in various industries to determine the moisture content of raw materials, intermediates, and finished products, providing data support for product formula optimization and process improvement.

• Quality Control Scenarios: Applied in the quality inspection process of production lines to conduct random inspection or full inspection of product moisture content, ensuring that the product quality meets the specified standards.

• Raw Material Incoming Inspection Scenarios: Used to detect the moisture content of purchased raw materials to prevent unqualified raw materials from entering the production process and affecting product quality.

• Sample Testing in Scientific Research Institutions: Suitable for moisture content testing of various samples in scientific research projects, providing accurate experimental data for scientific research.

6.2 Industry Adaptation

• Pharmaceutical Industry: Used to test the moisture content of pharmaceutical raw materials, excipients, and finished drugs (such as tablets, capsules, and powders) to ensure drug stability, efficacy, and compliance with pharmacopoeia standards.

• Chemical Industry: Applicable to the moisture detection of chemical products such as solvents, resins, pigments, and catalysts. Controlling moisture content is crucial for ensuring the performance and quality of chemical products and avoiding adverse reactions during production and storage.

• Food Industry: Used to measure the moisture content of food raw materials (such as grains, fruits, and vegetables) and finished products (such as snacks, beverages, and dairy products). Proper moisture content is essential for maintaining food freshness, extending shelf life, and ensuring food safety.

• Petroleum Industry: Suitable for the moisture detection of petroleum products such as gasoline, diesel, lubricating oil, and crude oil. Excessive moisture in petroleum products will affect their combustion performance, cause equipment corrosion, and increase maintenance costs.

• Material Industry: Applied to the moisture testing of materials such as plastics, rubber, textiles, and paper. Controlling moisture content helps improve the processing performance, mechanical properties, and service life of materials.

7. Accessories and Consumables Configuration

7.1 Standard Accessories

• 10.0 - inch LCD color large - screen touch display (integrated with the main machine)

• Cortex - A8 core high - speed processor (built - in the main machine)

• Android operating system (pre - installed in the main machine)

• Built - in thermal printer (integrated with the main machine)

• Sealed titration cell bottle (used to hold reagents and samples, avoiding contact between reagents and humans and the influence of environmental humidity)

• Stirring device (used for mixing samples and reagents during the measurement process, with adjustable speed)

• RS232, 485 serial ports, and USB interface modules (built - in the main machine, used for communication with external devices)

• Power cable (used to connect the instrument to the power supply)

• Operation manual (providing detailed instructions on instrument installation, operation, maintenance, and troubleshooting)

7.2 Optional Accessories

• Automatic liquid addition and drainage device (used to realize automatic addition and drainage of reagents, reducing manual operation)

• Mobile phone APP (for remote operation and control of the instrument, real - time synchronization of data)

• Cloud platform access module (used to upload measurement data to the cloud platform for data management and analysis on the computer side)

• PC communication software (facilitating data transmission and interaction between the instrument and the computer)

7.3 Consumables

• Karl Fischer reagent (the core consumable for moisture measurement, including anode electrolyte and cathode electrolyte, which needs to be replaced regularly according to usage)

• Thermal printing paper (used for the built - in thermal printer to print experimental results, and needs to be replaced when exhausted)

• Sealing gaskets for titration cell bottles (used to ensure the sealing performance of the titration cell bottle, and need to be replaced when they are aged or damaged)

• Sample injection needles (used for injecting samples into the titration cell bottle, and need to be replaced when they are blocked or damaged)

8. Brand Value and Service Support

8.1 Brand Value

• Technological Innovation: Hengmei Intelligent adheres to technological innovation as the core driving force. The HM - WS4 Karl Fischer Moisture Meter adopts advanced technologies such as Cortex - A8 high - speed processor, Android operating system, and alternating balance isolation detection, reflecting the brand's strong R&D strength and technological leadership in the field of moisture measurement instruments.

• Product Quality: The brand focuses on product quality control. Each HM - WS4 Karl Fischer Moisture Meter undergoes strict quality inspection during the production process, from the selection of components to the assembly and testing of the whole machine, to ensure that the product meets high - quality standards and has stable performance and long service life.

• User - Centric: Hengmei Intelligent takes user needs as the 导向. The design of the HM - WS4 instrument fully considers user experience, with a friendly human - machine interface, simple operation steps, and rich functional configurations, meeting the diverse needs of users in different industries and application scenarios.

• Industry Reputation: After years of development, Hengmei Intelligent has established a good reputation in the field of analytical instruments. Its products are widely recognized and trusted by users in the pharmaceutical, chemical, food, and other industries, and the brand has become a reliable choice for users in the moisture measurement field.

8.2 Service Support

• Pre - sales Consultation Service: The professional sales team provides pre - sales consultation services for users, answering questions about the product's functions, technical parameters, application scenarios, and prices, and providing suitable product solutions according to the user's specific needs.

• On - site Installation and Commissioning Service: For users who purchase the instrument, the brand provides on - site installation and commissioning services. Professional technicians go to the user's site to install the instrument, debug the equipment, and ensure that the instrument can operate normally and meet the user's measurement requirements.

• Operation Training Service: After the instrument is installed and commissioned, the brand provides operation training services for the user's operators. The training content includes the basic operation of the instrument, parameter setting, sample detection, data processing, and daily maintenance, enabling the operators to master the use of the instrument proficiently.

• After - sales Maintenance Service: The brand has a professional after - sales maintenance team to provide timely after - sales maintenance services for users. If the instrument fails during use, users can contact the after - sales service hotline, and the after - sales team will respond quickly, provide remote technical support, or send technicians to the site for maintenance and repair.

• Spare Parts Supply Service: The brand has a complete spare parts supply system, ensuring the timely supply of spare parts for the instrument. If the instrument needs to replace spare parts, users can purchase genuine spare parts from the brand to ensure the normal operation and measurement accuracy of the instrument.

• Software Upgrade Service: With the development of technology and the increase of user needs, the brand regularly provides software upgrade services for the instrument. Users can upgrade the instrument's operating system and application software for free or at a low cost, so that the instrument can always have the latest functions and performance.

9. Model Comparison and Selection Suggestions

9.1 Model Comparison

Currently, Hengmei Intelligent only provides one model of Karl Fischer Moisture Meter, which is HM - WS4. There are no other models in the same series for direct comparison. The HM - WS4 model integrates all the advanced technologies and rich functions of Hengmei Intelligent in the field of Karl Fischer moisture measurement, covering the measurement needs of most users from the aspects of measurement range, accuracy, sensitivity, and functional configuration.

9.2 Selection Suggestions

• Selection Based on Measurement Requirements: If the user needs to measure samples with a moisture content ranging from 0.0001% (1ppm) to 100%, and has high requirements for measurement accuracy (±2μg for 5μg - 1mg, 0.2% for above 1mg) and sensitivity (0.01ugH₂O), the HM - WS4 model is a suitable choice. It can meet the measurement needs of trace, low - content, and high - content samples.

• Selection Based on Functional Requirements: If the user requires functions such as large - capacity data storage (20,000 experimental results), remote control via mobile phone APP, cloud data management, automatic liquid addition and drainage (optional), and multiple unit display and average value calculation, the HM - WS4 model can fully meet these functional needs.

• Selection Based on Industry Application: For users in the pharmaceutical, chemical, food, petroleum, and material industries, the HM - WS4 model has good industry adaptability. It can be applied to the moisture detection of various samples in these industries and meet the relevant industry standards and quality control requirements.

• Selection Based on User Scale and Budget: For laboratories of enterprises, scientific research institutions, and quality inspection departments of all scales, the HM - WS4 model has a reasonable cost - performance ratio. For small - and medium - sized laboratories with basic moisture measurement needs, it can provide accurate and reliable measurement results; for large - scale laboratories with high requirements for automation and data management, its rich functions can also meet the work needs. Users can choose this model according to their own budget and actual application scenarios.