日本語(Japanese) 
English 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.
Specifications
| 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