Mettler Toledo RE40D Digital Refractometer with Peltier Temperature Control and RS-P42 Printer

The Mettler Toledo RE40D Digital Refractometer is engineered for accurate determination of refractive index (nD 1.32–1.70) and Brix concentration (0–100%) in aqueous solutions, including glycerol, propylene glycol, and acetone. Utilizing a total reflection measurement method, it delivers reliable results even with turbid or dark samples, essential for biotechnology and molecular diagnostics workflows.

Key features include a compact built-in Peltier thermostat maintaining a stable temperature range of 15–70°C (59–158°F), eliminating the need for external water baths. The instrument requires a minimal sample volume of 0.2 mL, facilitating rapid analysis with a typical measuring time of 15 seconds. Calibration is straightforward using water or certified standards, ensuring reproducibility and precision.

Performance specifications:

The unit is supplied with the RS-P42 printer, enabling seamless data output for documentation in bioprocessing, synthetic biology, and biomanufacturing quality control. The RE40D is widely adopted in biomedical engineering, live-cell imaging preparatory analysis, and molecular biology labs, where precise concentration measurements are critical for experimental reproducibility.

This digital refractometer is a vital instrument for researchers requiring reliable and fast refractive index and concentration measurements, supporting essential applications such as molecular cloning workflows and molecular diagnostics.