Excellence Refractometers

Developed for a broad range of industries, METTLER TOLEDO’s Excellence Refractometers can measure almost any sample with a very high accuracy.

With measurements of up to five decimal places, intuitive operation, and a modular workflow, you can easily terminate inaccuracy and generate repeatable, accurate results.


Keep It Simple
Refractometry has never been so easy! With simple operating routines and an intuitive touch screen user interface, you can perform measurements quickly and efficiently. Shared across different METTLER TOLEDO analytical solutions, the One Click™ user interface provides easy access to all the tasks you need, simplifying your daily work and making you feel right at home.
Simplify Your Quality Control
Minimize training and operator influence with one click for fully automatic quality control analysis. Simply press on the product shortcut: measured products are automatically verified, and the color of the result indicates if specifications have been met.
Automate Your Analysis
Save time, reduce costs and improve operational safety by minimizing the need for operator interaction. Increase the quality of your measurement data by automating your analysis: ensure that all steps are performed the same way each time. With fully automatic determination, you can take results repeatability and reliability to a whole new level.
Go Digital with LabX®
Future-proof your lab. Much more than just an instrument management software, LabX® PC software manages data, instruments, and users while bringing your tasks directly to the instrument’s touch screen. With bi-directional integration into your ELN, LIMS, or SAP system, you can save paper, avoid transcription errors and ensure data integrity.
Save Time with Multiparameter Measurements
Make the most of your time while increasing data quality. Multiparameter analyses combining refractive index, density, pH, titration, and more prevent the alteration of samples between individual analyses. Results can be displayed directly on the instrument screen, ensuring that all of your data is at your fingertips.
Enhance Your Workflow
Log in with your biometric fingerprint, enter a product ID with the barcode scanner, start the measurement with the wave of a hand, and export your results to a USB printer, USB stick, PC software, LIMS, ERP or SAP. Ensure consistently high performance of your instrument with regular calibration using certified traceable standards.
Model R4 R5
Accuracy nD (±) 0.0001 0.00004
Measurement Range nD 1.3200 … 1.7000 (nD) 1.32000 – 1.58000 [nD]
Temperature control range 0-100°C 5 °C – 95 °C
Temperature control accuracy (±) 0.1°C 0.03 °C
Brix measurement range 0.00 – 100.00% w/w
Accuracy Brix 0.05% ; 0.005% w/w 0.014 %; 0.0001 % w/w
Display / User interface 7″display with color touchscreen
Minimum sample volume 0.5 mL
Measurement scales Refractive Index, Sugar (Brix and more), Acid/Base, Chemical, Freezing Point, Salt, Others; Up to 30 user-defined concentration tables (can be entered as tables or formulas).
Languages English, Chinese, German, Spanish, French, Italian, Portuguese, Russian, Polish
Connectivity 3 × USB host (printer, memory stick, barcode reader, hub, keyboard, mouse), CAN (Multiple LevelSens), Ethernet (Network and PC Software), HDMI (Terminal), RS232 (Automation units), USB client (PC Software)
Dimensions (DxHxW) 226 x 193 x 208 mm
Weight 4.8 kg