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
Complementary products
If you do not find the item you require, please contact your Anton Paar sales representative.


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