Inline Refractometer Sensor:
L-Rix
- Best-in-class accuracy ensures consistent product quality control.
- Compact, lightweight design fits easily into tight spaces.
- Quick installation via threaded connectors reduces downtime.
- Integrated self-diagnostics minimize maintenance requirements.
- Single M12 cable simplifies setup and reduces installation complexity.
We bring you what you have long been waiting for: an inline refractometer for continuous brix concentration monitoring in metalworking machines (e.g. cooling lubricants, aqueous polymer quenching fluids), industrial processes, and fruit and vegetable processing, L-Rix 2100 and L-Rix 3100 provide a unique combination of best-in-class quality, price, accuracy, and compactness. The L-Rix 2100/3100 Series increases the lifetime of tools and machines, optimizes the quality of manufactured pieces, reduces downtime, minimizes maintenance costs, ensures reliable performance for years, and helps you master challenging industrial conditions.
Key features
Inline refractometer sensor: Maximum lifetime
- Continuous brix monitoring – ensuring optimal concentration all the time
- Key parameter for production perfection in various processes
- In metalworking - preventing the wear and tear of cutting tools and optimizing the quality machined parts
- In food processing - ensuring consistent quality and reduction of production losses.

Unparalleled precision
- Unparalleled precision: ±0.15 °Brix to 0.2 °Brix
- Unique compactness: 114 mm x 34 mm
- Competitive price point: ideal cost-performance balance
- Strong combination of affordability and superior accuracy

Supreme quality
- Built out of sapphire
- Produced in 'clean room': prevents dust particle embedding
- Built-in self-diagnosis to prevent inaccurate readings
- IO-Link interface, also providing diagnostic information

Continuous performance
- Up-and-running fast: pre-configured
- 15+ years of operation in tough industrial environments
- Reduction of downtime
- Minimization of maintenance costs

Specifications
L-Rix 2100 | L-Rix 3100 | |
LED Status | Yes | |
Refractive index | Range: 1.3268 nD to 1.3830 nD (0 °Brix to 30 °Brix) | Range: 1.3268 nD to 1.4215 nD (0 °Brix to 50 °Brix) |
Accuracy | ±0.20 °Brix | ±0.15 °Brix |
Repeatability | ±0.10 °Brix | ±0.075 °Brix |
Housing material | Stainless steel 1.4305 and plastic material | |
Material of the wetted parts | Sapphire (Al2O3 – 99.997 %), stainless steel 1.4305, VICTREX FG 200 | Sapphire (Al2O3 – 99.997 %), stainless steel 1.4404, VICTREX FG 200 |
Ambient temperature | Repeatability | |
Process temperature and pressure | 0 °C to 60 °C, 0 bar to 10 bar | |
Process connections | G1“ Male, according to DIN/ISO 228 | |
Protection class | IP65; IP67 | |
Output | °Brix and temp | |
Communication | Analog, IO-LINK | |
PLC Connection | M12 sealed connector with single cable for power supply and 2x analog output | |
Apparent ohmic resistance | 240 Ohm to 500 Ohm | |
Power supply | DC 24 V (range 20 ... 30) SELV/PELV (Class 2 circuits) | |
Cleaning (using AP adapter with cleaning connection) | Water or approved cleaning agents – up to 60 °C, 5 bar max. | |
Storage conditions: ambient temperature and relative humidity | -40 °C to +70°C; 10 % to 100 % | |
Certification | FCC, CE, UL | FCC, CE, UL, 3A* |
*When used with VARIVENT® adapter
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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Chemistry | Emulsions | Aqueous polymer quenchants monitoring with L-Rix 2100 Application Reports
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Chemistry | Emulsions | Wire drawing emulsion monitoring with L-Rix 2100 Application Reports
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EU Declaration of Conformity | L-Rix 2100/3100 Certificates
Consumables & Accessories
Consumables & 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.

L-RIX 2x00 PROCESS CONNECTION O-RING
L-Rix 2100
- COG Material: Si 971, FL
- Base Elastomer: Fluorosilicone Rubber (FVMQ)
- Inner Diameter (d₁): 25 mm
- Cross-Section (d₂): 2 mm
- Operating Temperature (Air): -60 °C to 200 °C
- Hardness: Shore A
- Color: Blue

L-RIX 3x00 PROCESS CONNECTION O-RING
L-Rix 3100
- Material: EPDM
- Compound Code: EPDM 70.503-00
- Inner Diameter (d₁): 25 mm
- Cross-Section (d₂): 2 mm
- Operating Temperature (Air): -57 °C to 150 °C
- Hardness: Shore A
- Compliance: 3-A Sanitary Standard No. 18-03 Class II; FDA CFR 21 - 177.2600 "Rubber articles intended for repeated use"
- Color: Black

L-RIX 2100 TRANSMITTER SET INLINE REFRACTOMETER SET
L-Rix 2100
- Accuracy: ±0.0003 nD (equivalent to ± 0.2 % mass)
- Repeatability: ±0.00015 nD (equivalent to ± 0.1 % mass)
- Refractive index range: 1.3268 to 1.3830 nD
- Sugar range: 0 to 30 %
- Process temperature: 0 °C to 60 °C
- Process pressure: 100 mbara to 10 bara
- Ambient temperature: -5 °C to 55 °C
- Wetted parts: Stainless steel 1.4305, PEEK, Sapphire
- Protection rating: IP65; IP67
- Output Signal: Dual-channel analog (4–20 mA) or IO-Link
- Process connection Sensor: G1" Male, according to DIN/ISO 228
- Sensor connection Adapter: G1" Female, according to DIN/ISO 228
- Process connect

L-RIX 3100 TRANSMITTER SET INLINE REFRACTOMETER SET
L-Rix 3100
- Accuracy: ±0.00025 nD (equivalent to ± 0.15 % mass)
- Repeatability: ±0.000125 nD (equivalent to ± 0.075 % mass)
- Refractive index range: 1.3268 to 1.4215 nD
- Sugar range: 0 to 50 %
- Process temperature: 0 °C to 60 °C
- Process pressure: 100 mbara to 10 bara
- Ambient temperature: -5 °C to 55 °C
- Wetted parts: Stainless steel 1.4404, PEEK, Sapphire
- Protection rating: IP65; IP67
- Output Signal: Dual-channel analog (4–20 mA) or IO-Link
- Process connection Sensor: G1" Male, according to DIN/ISO 228\