RI8800 Refractive Index Detector

In refractive index detector, the light beam undergoes a deflection in proportion to a difference in refractive index between sample side liquid and reference side liquid as it passes through the flow cell.

The deflection of the light beam is taken as a displacement on the light-receiving element (photo sensor) and is displayed as a difference of the refractive index.

Most of refractive index detector out in the market employ reference stop valve so called that suspends reference side liquid delivery to the cell during a measurement. A state of reference side liquid trapped in the cell should change over time and may affect a precision of measurement.

To be faithful to the theory, RI8800 maintains dual flow (sample side and reference side) in parallel always.

RI8800 示差屈折率検出器


Measuring Method Brice, Deflection Type
Flow Path Dual Flow
Refractive Index Range 1.00~1.8
Measuring Range 0.25, 0.50, 1.00, 2.00, 4.00, 8.00, 16.00, 32.00, 64.00, 128.00,
256.00, 512.00, S(×10-6 RIU/FS) *1
Flow Cell Internal Volume : 2.5 μL (option; 8 or 10 μL)
Pressure Rating : 5 kgf/cm, 0.5MPa
Noise 2.5×10-9 RIU(THF, Response: 3.00 sec) *2
Drift 8×10-7 RIU/h
(THF, Flow Rate 1.0 mL/min, Ambient temperature change within +/-1℃)
Response 0.05, 1.00, 3.00 sec
Temperature Control 30, 35, 40, 45, OFF
Auto Zero Measuring Range
Signal Input Marker: TTL level or Contact Closure *3
Auto Zero: TTL level or Contact Closure
Signal Output Recorder: 10 mV/FS
Integrator: 1V/256×10-6 RIU、1V/64×10-6 RIU
Marker: Recorder+1mV or Contact Closure
Leak: Contact Closure
Dimensions 240(W)×150(H)×440(D) mm
Weight 12 kg
Power AC100V +/-10%, 50/60 Hz, 100 VA
Tubing (Accessory) Inlet: 316SST, 0.2 mm (ID) × 800mm (L)
Outlet: 316SST, 0.6 mm (ID) × 800mm (L)

*1 Refractive Index Unit
*2 Tetrahydrofuran (THF)
*3 Transistor-Transistor Logic