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CRN36 Series Inline Refractometer
CRN36 Series Inline Refractometer delivers real-time concentration monitoring with a response time measured in seconds, offering an accuracy level comparable to laboratory-grade equipment.
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  • The CHNSpec CRN36 Series Inline Refractometer delivers real-time concentration monitoring with a response time measured in seconds, offering an accuracy level comparable to laboratory-grade equipment. Featuring a sapphire prism and a stainless steel housing, it boasts an IP68 protection rating, ensuring exceptional resistance to corrosion and high pressure; furthermore, its intelligent temperature compensation system enables seamless adaptation to complex operating environments. Supporting PLC integration and customized installation options, this instrument is widely utilized across sectors such as food and beverage, sugar refining, chemicals, and pharmaceuticals, helping manufacturers enhance product quality while reducing production costs.

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Exceptional accuracy throughout the entire process: CRN36 Series Inline Refractometer

In precision industrial production, concentration fluctuations in every drop of raw material can affect the quality of the final product. The CRN30/32/36 Series Inline Refractometers are monitoring tools tailored for your demanding process environments. They are not just sensors but also "digital eyes" conducting 24/7 uninterrupted inspections in your plant. True process control is not just about "seeing" data but "anticipating" trends. With 24-hour continuous monitoring, the CRN Series helps you respond before quality deviates from standards, thereby significantly improving yield rates and reducing raw material waste.

Core values: Real-time, Precision, No Compromise

Real-time Concentration Monitoring: Say goodbye to the lag of laboratory sampling. The CRN Series provides continuous measurement with second-level response, ensuring that every step—from raw material receiving and semi-finished processing to final product output—remains under control.

Data Accuracy: Delivers real-time concentration measurement results comparable to laboratory benchtop refractometers.

Built for Extreme Environments: Adopting a rugged industrial-grade design, it can be installed directly on pipelines or tanks. Even under fluctuating process temperatures, the built-in high-precision temperature compensation system ensures consistent measurement values.

Fully Automated Production Control: Sensor data can be seamlessly integrated into your PLC or control system to achieve closed-loop automatic adjustment of the production process, significantly reducing labor intervention costs and error rates.

Technical Highlight

Measurement Principle: Adopts the critical angle total reflection principle, unaffected by bubbles, solid particles, or color.

Robustness: Sapphire prism and stainless steel housing, resistant to corrosion and high pressure.

Temperature Compensation: Monitors process temperature in real time with automatic compensation to reference temperature.

Maintenance Cost: Modular design with no wearing parts, resulting in extremely low maintenance frequency.


Technical Parameters

Product Model CRN30 CRN32 CRN36
Measurement Parameters Refractive Index, Temperature, Concentration, Brix (or other scales)
Display Parameters Refractive Index (nD), Brix (temperature compensated according to sucrose), Concentration (Conc), Temperature (°C)
Data Processing System

Probe status diagnosis, RI calibration and adjustment, self-modeling, multi-point temperature compensation,

concentration curve correction

Concentration Range 0.0~70%Brix 0.0–90% Brix 0.0~100%Brix
Refractive Index Range 1.33299~1.46510 1.33299–1.51782 1.33299~1.57041
Resolution Brix 0.01%, Refractive Index 0.00001, Temperature 0.1°C
Measurement Accuracy Brix ±0.1%, Refractive Index ±0.0001, Temperature ±0.5°C
Temperature Range Process temperature: –20 to 70°C; Cleaning temperature: 0 to 120°C; supports CIP and SIP
Process Connection Type Compact clamp (customizable tee/cross connections for other pipe sizes)
Key Component Material

Wetted Materials: SS316L+

High-Strength Optical Glass

Wetted Materials: SS316L + Sapphire (Optional: Hastelloy, Titanium, Tantalum)
Power Input Standard: 24V DC; Optional: 100–240V AC/50–60 Hz, 30VA
Cable Length Standard: 2 m, customizable up to 200 m
Display Mode 1.14-inch display on the unit
Signal Output 4–20 mA / RS485
Protection Rating IP68 (wetted parts)
Pressure Range ≤1.6 MPa
Net Weight ≈1.0 kg
Cleaning Options Ultrasonic cleaning assembly, high-pressure flushing assembly
Installation Options

Small pipe diameter installation adapter, tee/cross pipe (with sight glass), sanitary adapter, etc., customized according

to installation conditions

Other Options

Remote display controller, multi-channel data acquisition control system (supports up to 120 channels), terminal

data acquisition system, wireless data transmission module

Special Scales Non-standard customization, data model built according to customer requirements


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