CHNSpec Technology （Zhejiang）Co.,Ltd chnspec@colorspec.cn 86--13732210605
In industrial production, stable control of liquid concentration is directly related to product quality and production efficiency, and real-time monitoring of liquid concentration changes has become a core demand in many industries. The Inline Refractometer, with its ability to detect the correlation between liquid refractive index and concentration, has become a key device to meet this demand. As a practical device in the industrial detection field, the CHNSpec CRN56 Inline Refractometer realizes precise real-time monitoring of liquid concentration through scientific verification methods and mature technical design. The following elaborates on its core logic, verification methods, and device characteristics.
I. Core Principle of Real-Time Monitoring by Inline Refractometer
There is a stable correlation between the concentration and refractive index of a liquid. Under the same temperature conditions, when the liquid concentration changes, its refractive index will change correspondingly in a regular manner. The core working logic of the Inline Refractometer is to continuously detect the refractive index of the liquid and, combined with temperature compensation and other technologies, convert the refractive index data into the corresponding concentration value, thereby capturing liquid concentration changes in real time. This process does not require interruption of production flow and can be continuously performed in liquid conveying or storage conditions, providing data support for dynamic adjustment of the production process.
II. Verification Methods of Inline Refractometer: Laying the Accurate Foundation for Real-Time Monitoring
Verification is the premise to ensure the reliability of monitoring data from an Inline Refractometer and mainly includes factory verification and on-site calibration. CHNSpec CRN56 has established standardized procedures for both steps to ensure measurement accuracy from initial use to continuous operation.
(1) Factory Verification: Establishing Initial Accuracy
The probe of the CHNSpec CRN56 undergoes a strict verification process before leaving the factory, focusing on accuracy in detecting refractive index, concentration, and temperature. During verification, reference liquids with standard concentrations are used to repeatedly check the detection data under different temperature conditions, ensuring its refractive index measurement accuracy reaches 0.0001, concentration measurement accuracy is controlled within ±0.1%, and temperature detection accuracy meets the 0.5°C standard. At the same time, the device is preloaded with multi-point temperature compensation parameters to offset the impact of temperature changes on concentration detection, ensuring stable detection results within the conventional industrial temperature range. After passing verification, the device is delivered as a complete set, ready for installation and use without requiring complicated initial debugging.
(2) On-Site Calibration: Sustaining Accuracy to Match Working Conditions
Industrial environments are complex and variable, and the liquid characteristics or working conditions may differ from the factory verification conditions. Therefore, on-site calibration becomes an important supplement to maintain real-time monitoring accuracy. The CHNSpec CRN56 supports RI (refractive index) calibration and adjustment functions. Users can calibrate the device on site using actual liquid samples to correct any potential deviations.
In addition, the device has a built-in concentration data processing system, enabling users to establish exclusive data models on site based on actual liquid characteristics in production. By adjusting parameters to match the detection needs of specific media, concentration monitoring accuracy is further improved. This flexible calibration approach allows the device to better adapt to various working conditions and ensures long-term monitoring reliability.
III. Key Technical Support Enabling Real-Time Monitoring in CHNSpec CRN56
Beyond scientific verification, the CHNSpec CRN56 ensures continuity, stability, and convenience in real-time monitoring through multiple technical designs, fully meeting the practical needs of industrial production.
(1) Anti-Interference Detection Design: Ensuring Stable Data Output
Industrial liquids often contain bubbles, colors, or turbidity, and production conditions such as pressure and flow may fluctuate. These factors can affect detection accuracy. The CHNSpec CRN56 adopts advanced detection technology that effectively avoids such interference. Whether the liquid contains color, small amounts of bubbles, or common pressure or flow fluctuations, the device can stably output detection data. Its refractive index measurement range covers 1.33299–1.57041, and its concentration range reaches 0.0–100% Brix, suitable for a wide variety of concentration monitoring needs, providing broad applicability for real-time monitoring.
(2) Efficient Data Processing and Transmission: Achieving Real-Time Feedback
The CHNSpec CRN56 has a complete built-in data processing system. In addition to supporting self-modeling and temperature compensation, it is equipped with probe-status diagnostic functions that monitor operational status in real time, quickly locating faults and reducing interruptions caused by equipment issues. In terms of data transmission, it supports multiple output formats including 4–20 mA, RS485, RS232, and USB, and can be paired with a wireless transmission module to send real-time data such as concentration, temperature, and refractive index to control centers or terminal devices. Its multi-channel data acquisition and control system supports up to 120 channels, meeting the needs of multi-point simultaneous monitoring and expanding real-time monitoring application scenarios.
(3) Stable Operation Guarantee: Adapting to Complex Industrial Environments
Continuous real-time monitoring depends heavily on environmental compatibility. The CHNSpec CRN56 uses SS316L + sapphire as standard contact materials, with optional PTFE or Hastelloy materials, providing excellent corrosion and wear resistance for various chemical properties of liquids. Its process temperature range is −20–70°C (up to 100°C), and cleaning temperature supports 0–120°C. It is compatible with CIP (clean-in-place) and SIP (sterilize-in-place) processes, enabling cleaning and sterilization during production intervals without affecting subsequent monitoring. In addition, the contact part is IP68-rated, pressure-resistant ≤1.5 MPa, and explosion-proof rated ExiaIICT6Ga, ensuring safe and stable operation in complex industrial environments.
(4) Convenient Installation and Maintenance: Lowering the Usage Barrier
The CHNSpec CRN56 supports flexible installation for pipelines, tanks, and various scenarios. It offers clamp types and DN25/DN50 flange options, while custom accessories such as small-diameter adapters or sanitary adapters can be configured based on working conditions to reduce installation time and cost. The device uses an intelligent chip, requires no reagents, has low power consumption, and its probe light source lifespan reaches 100,000 hours, reducing maintenance frequency and cost. The 1.4-inch display provides intuitive real-time on-site data viewing for convenient operation.
Real-time monitoring of liquid concentration using an Inline Refractometer fundamentally relies on accurate detection of the correlation between refractive index and concentration, while scientific verification ensures the reliability of this process. Through strict factory verification and flexible on-site calibration, the CHNSpec CRN56 establishes a solid foundation for accurate detection. Combined with anti-interference detection technology, efficient data processing and transmission, strong environmental adaptability, and user-friendly installation and maintenance design, it ensures real-time, stable, and reliable concentration monitoring. Whether in food and beverages, biopharmaceuticals, environmental chemicals, or metal manufacturing, the device supports precise concentration control, helping enterprises improve production efficiency and ensure product quality, making it a practical choice for real-time liquid concentration monitoring in industrial production.
