The Optilab T-rEX (Extended Range Refractometer) is a refractive index detector with 256 times the detection power and 50 times the dynamic range of any currently existing RID. By combining state-of-the-art semiconductor photodiode technology and proprietary computer algorithms, the T-rEX achieves an unprecedented combination of sensitivity and range. For example, there are no range or profit settings. The full range of instrument detection is always present and full sensitivity exists across the entire range. The rEX also features a flow cell with a total volume of just 7.4uL - that's 25% less than the leading refractometers available today. This leads to minimization of band broadening and better temperature stability. The Optilab rEX can also do something no other online refractive index detector can: it can measure the absolute refractive index of a solution. It can also measure the dn/dc of a solvent at the same wavelength of light as the light scattering instrument. And just to make sure it can't be surpassed, you can replace the light source in the T-rEX with other wavelengths (e.g. 690, 633, 488, etc. ). The new Optilab T-rEX shares the ability of its predecessor (the Optilab rEX) to operate below ambient temperatures as easily as above. Hassle-free temperature control can be programmed to 4°C or up to 50°C. Compatible with all HPLC systems. Features: Range: -0.0047 to +0.0047 RIU (range and sensitivity of differential refractive index), 1.2 - 1.8 RIU (range and sensitivity of absolute refractive index). Wavelength range: 488 to 690 nm Labprocure is responsible for this device.