Physiology & Biophysics


Optilab rEX (RI detector)

Manager: Yinghua Chen, PhD
Contact Email:
Contact Phone: 216-368-8962
Availablility: By Availability

Major Applications:

Refractive-index detector measures the change of refractive index with distinctive interferometric design and the ability to cool samples to below ambient temperature.

Major Specifications:

Differential Refractive Index Range & Sensitivity:Range (RIU) -0.0047 — + 0.0047, Peak-to-peak noise (RIU)* ± 7.5 x 10-10

High Concentration Option T-rEX: Range (RIU) -0.0026 — + 0.034, Peak-to-peak noise (RIU)* ±1.5 x 10-9

Fluid Volumes: Flow cell 7.4 μL, Inlet tubing (0.010” ID) 44 μL, Outlet tubing (0.030” ID) 370 μL

Dynamic Range: 22+ bits only via digital communication

Response Time: 0.1 - 5 seconds, user selectable

Absolute Refractive Index Range and Sensitivity: 1.2 - 1.8 RIU (sensitivity of ± 0.002 RIU)

Light Source: 660 nm standard; Other wavelengths available S

Sample Temperature Control Range: 4°C - 50°C, temperature regulated

Temperature Regulation: ± 0.005°C

Maximum System Pressure: 30 psi (2 bar)

Maximum Cell Pressure: 100 psi (7 bar)

Safety Sensors: Vapor and liquid (leak)

Inputs and Outputs: Analog In 16 bit ± 10V A/D for auxiliary user data, Analog Out 18 bit D/A for dRI data, ± 10V or ± 1V output

Inputs: Zero, Purge, Recycle, Autoinject, Alarm In

Output: Autoinject Retransmit, Alarm Out, External Solenoid, Recycle Valve. 12VDC solenoid valve (sold separately, or user supplied) to switch automatically between waste and recycle


Manual: Optilab rEX Users Guide M1500
Manufacturer: Wyatt
Location: E549
Required Training: Basic Training
Training Fee: 0.00

Usage Fees:
Optilab rEX (RI detector):$8.00 Per hour

Consumable Fees:
Director: Walter F. Boron, MD, PhD
Owner: Walter F. Boron, MD, PhD
Responsible PI: Matthias Buck, MA, DPhil
Class: Core Equipment -- PEPCMBC