2995BB HPLC Wyatt Optilab Rex RI Detector

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Item: 2995BB_HPLC

  • Fully tested
  • Thoroughly cleaned
  • Ships from Haverhill, MA

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Call 978-521-2221
to request information & pricing for item 2995BB_HPLC

90-Day Warranty

American Instrument Exchange
Contact us for all your used lab equipment needs

1023 Western Ave.
Haverhill, MA 01832

Phone: 978-521-2221
Fax: 978-521-8822

Email: info@americaninstrument.com

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Wyatt Optilab REX RI Detector

  • Model TREX-02
  • Universal detection for chromatography and FFF separations.
  • dRI measurement range, -0.0047 to +0.0047RIU
  • High resolution, touch-screen front panel display

The Optilab T-rEX (refractometer with extended range) is a unique dRI detector for standard HPLC/GPC with 256 times the detection power and 50 times the dynamic range of other RI detectors for chromatography in existence today, making it a valuable addition to any MALS setup.  The Wyatt Optilab REX detector can measure the absolute refractive index of a solution as well as the dn/dc of a solvent at the same wavelength of light as the light scattering instrument. The light source in the T-rEX can be replaced for other wavelengths (e.g., 690, 633, 488, etc.) in just minutes.

All of our equipment is used and reconditioned. Our technicians test all equipment to confirm that it operates properly. While we can’t test for a specific analytical application, we will do our best to simulate the conditions under which the equipment will be run. If you have particular testing requirements or requests please let us know and we’ll work with you to make sure these requirements are addressed during testing.

Differential Refractive Index


Standard T-rEX



-0.0047 – +0.0047 RIU

   Peak-to-peak noise

± 7.5 x 10-10 RIU

High Concentration Option T-rEX



-0.0026 – +0.034 RIU

   Peak-to-peak noise

± 1.5 x 10-9 RIU

Absolute Refractive Index



1.2 – 1.8 RIU


0.002 RIU



   Band Broadening

< 20 µL

   Flow cell

7.4 µL

   Inlet tubing (0.010" ID)

44 µL

   Outlet tubing (0.030" ID)

370 µL

   Back pressure created at inlet port

<50 psi (3.5 bar) @ 0.5 mL/min of pure water, 20°C

   Maximum permissible back pressure at outlet port

30 psi (2 bar)

   Wetted Materials

316 stainless steel, PTFE, fused silica

Dynamic Range

22+ bits only via digital communication

Data Acquisition Period

0.2 - 10 samples/second

Light Source

660 nm standard; other wavelengths available

Sample Temperature


   Control Range

4°C – 65°C, temperature regulated

   Temperature Regulation

± 0.005°C