Atago DR-M2 Refractometer: Multi-wavelength accuracy for liquids and solids
The Atago DR-M2 model is a laboratory refractometer designed to measure the refractive index (nD) and Abbe number (νd) over a wide wavelength range, from 450 to 1,100 nm. It is specifically designed to meet the measurement requirements of various materials, such as liquids, plastics, optical glasses and films, while providing direct, digital readings of the results. This model is particularly recommended for research laboratories, the optical industry and composite material manufacturers.
The measurement method is based on aligning the separation line observed through an eyepiece, directly crossed with reticles, ensuring reliable and reproducible value acquisition. The result is then displayed on a clear LCD screen, allowing quick access to measurements, whether for the refractive index or for calculating the Abbe number. The DR-M2 is also compatible with an optional digital printer (model DP-63B) for immediate archiving of results.
Its measurement system covers several wavelengths: 450 nm, 589 nm, 680 nm and 1,100 nm. At 589 nm (standard wavelength for refractometry measurements), it offers a refractive index measurement range from 1.3000 to 1.7100. At 450 nm, this range extends from 1.3278 to 1.7379, offering great flexibility for characterising optical materials with variable dispersion. The capabilities of the DR-M2 can also be extended with an optional infrared viewing accessory for the range from 681 to 1,100 nm.
The DR-M2 operates between 5 and 50°C, with precise temperature control via an external thermostatic bath (not included). The measurement accuracy is ±0.0002 for the refractive index, making it particularly suitable for materials requiring high metrological rigour. A 589 nm interference filter ensures measurement accuracy.
The device is powered by an AC100-240V (50/60Hz) AC adapter, ensuring global compatibility. With dimensions of 13 × 29 × 31 cm and a weight of 6.0 kg (excluding external power supply), it fits easily on a laboratory bench while offering the mechanical robustness required for regular operations.
The DR-M2 is a great choice for any organisation that needs to accurately measure the optical properties of solid and liquid materials at different wavelengths, in a wide range of sectors from fundamental research to industrial applications. Practical features such as digital display, printer connectivity and compatibility with an optional infrared viewer make it a comprehensive, reliable and easy-to-integrate instrument for demanding laboratory workflows.
