Inline Refractometer:
L-Rix
- 0 to 80 °Brix-range model with ±0.1 °Brix accuracy
- Maintenance-free
- Transmitter with standard °Brix formula
- Integrated analog outputs and HMI
Durable, maintenance-free inline refractometer for real-time concentration measurements and production control of raw, intermediate, and final products. Industry-leading optics and maintenance-free operation with full CIP/SIP capability.
Key features
Maintenance-free – forget servicing and operating costs
The inline refractometer L-Rix 4100/5100/5200 uses industry-leading optics which dramatically extends the instrument’s service life, increases reliability and safety, and reduces costs. Once adjusted at the factory, L-Rix 4100/5100/5200 operates with the stored adjustment values for its entire lifetime. Benefit from “install and forget” simplicity and years of continuous operation.

Inline and highly accurate – real-time concentration measurement where it matters most
L-Rix 4100/5100/5200 provides continuous, real-time concentration results analogous to those of laboratory refractometers. It gives you automatic control and monitoring of your process – at precisely the right point.

Robust – for minimized downtime
Rigid stainless-steel housing for robust measurements under adverse process conditions, along with ingress protection of the enclosure, shield against water jets and immersion. Once CIP/SIP routines are completed, the sensor reactivates in just minutes, to minimize downtime.

Plug and play – easy setup with maximum compatibility
No special training is required to set up and operate the instrument. L-Rix 5100/5200 is set up quickly and easily using the touchscreen interface of the built-in evaluation unit, via the Pico 3000 software, or Edge 7000/5000 process controller, while L-Rix 4100 comes ready with analog outputs and a touchscreen interface.
The sensors provide user-friendly diagnostics based on standard status categories according to NAMUR NE 107. Modular and expandable, L-Rix 5100/5200 can be easily adapted to support several communications protocols including analog (4 mA to 20 mA), Modbus RTU, Modbus TCP, PROFIBUS DP, PROFINET IO, and EtherNet/IP.

Specifications
L-Rix 4100 | L-Rix 5100 | L-Rix 5200 | |
Refractive Index | Range: 1.3100 to 1.4910 (equivalent to 0 % to 80 % mass) Accuracy: nD ±0.0002 (equivalent to ±0.1 % mass) Repeatability: nD ±0.0001 (equivalent to ±0.05 % mass) | Range: 1.3100 to 1.5400 (equivalent to 0 % to 100 % mass) Accuracy: nD ±0.0002 (equivalent to ±0.1 % mass) Repeatability: nD ±0.0001 (equivalent to ±0.05 % mass) | Range: 1.3100 to 1.4600 (equivalent to 0 % to 65 %) Accuracy: nD ±0.0001 (equivalent to ±0.05 % mass) Repeatability: nD ±0.00005 (equivalent to ±0.025 % mass) |
Calibration | Anton Paar‘s proprietary calibration routine using high-purity water and commercial nD references | ||
Material of the wetted parts | Stainless steel 1.4404, PEEK, Sapphire (Al 2O 3 – 99.997 %), O-ring 60x3 (VARIVENT N) EPDM 70 | ||
Ambient temperature | 0 °C to 50 °C | -20 °C to 60 °C | |
Process temperature | 0 °C to 100 °C | -20 °C to 120 °C | 0 °C to 105 °C |
CIP/SIP up to 145 °C for 30 minutes | |||
Process pressure absolute | 100 mbar to 10 bar | 100 mbar to 16 bar (10 bar @ >120 °C) | |
Detector | CMOS line sensor; 2048 elements | ||
Light source | LED 589 nm | ||
Temperature compensation | Automatic temperature compensation; integrated Pt-100 | ||
Process connections | Tuchenhagen VARIVENT ® Type N | Tuchenhagen VARIVENT ® Type N, Tri-Clamp ® 3‘‘ | |
Degree of protection | IP65; IP67 / NEMA 6P | ||
Communication | Analog | Analog, Analog/Digital, Modbus RTU, Modbus TCP, PROFIBUS DP, PROFINET IO, EtherNet/IP |
Anton Paar Certified Service
- More than 350 manufacturer-certified technical experts worldwide
- Qualified support in your local language
- Protection for your investment throughout its lifecycle
- 3-year warranty
Documents
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Beverage | Beer | Advancing yeast propagation Application Reports
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Beverage | Beer | Complete your Beer Analysis Application Reports
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Beverage | Beer | Fermentation Monitoring Application Reports
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Beverage | Color | Monitoring the sugar color of sugar in syrups Application Reports
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Beverage | Soft Drinks | Complete Your Soft Drink Analysis Application Reports
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Beverage | Spirits | Complete your Spirits Analysis Application Reports
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Chemistry | Concentration Measurement Application Reports
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Chemistry | DMAc and DMF | Concentration measurement of DMAs and DMF Application Reports
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Chemistry | Hand dishwashing liquids Application Reports
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Chemistry | Latex | Quality assurance during latex glove production Application Reports
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Chemistry | Urea and ammonium nitrate | Highest quality - maximum output Application Reports
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E-Book - Field Guide to Food and Feed Testing Application Reports
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E-Book - The Future of Plant-Based Foods Application Reports
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Food | Concentration measurement in yogurt production Application Reports
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Food | Dissolving Granulated Sugar Application Reports
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Food | Ditch the cow - plant-based milk alternatives Application Reports
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Food | Measurement of Tomato Concentrates Application Reports
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Food | Measurement of fruit and vegetable concentrates Application Reports
Accessories
Accessories
Accessories
Accessories
If you do not find the item you require, please contact your Anton Paar sales representative.
To find out if you can purchase online from your location, check the online availability below.


High Performance Process Controller:
Edge 7000
L-Rix 4100 | 5100 | 5200
- Cutting-edge performance with a 10.1-inch projective, multitouch display
- Long-term security and flexibility with a Linux-based operating system
- Intel® Atom® Processor power for unbeatable control
- Industrial-grade, fan-less design for reliability and durability
- Onboard communication with various fieldbus interfaces

High Performance Process Controller:
Edge 5000
L-Rix 4100 | 5100 | 5200
- Streamlined configuration without display (optional remote HMI)
- Linux-based operating system for long-term security and adaptability
- Unparalleled control power with an Intel® Atom® Processor
- Industrial-grade, optimized for cabinet integration (fan-less, DIN rail)
- Onboard communication with various fieldbus interfaces