Refractometric detectors

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FOR PREPARATIVE CHROMATOGRAPHY

The RI 2000 Differential Refractive Index Detector series offers the sensitivity, stability and reproducibility required for optimal RI detection. The thermal isolated optic with a counter current heat exchanger and with its programmable temperature control, results in an extremely stable baseline and an optimal Signal/Noise ratio. The RI 2000 series provide autopurge and autozero capabilities, as well as RS232 communication to acquire data directly without using any external signal interface.

  RI2000M/micro RI2000A/analytical RI2000P/semiprep
Detection Method Deflection
Refractive Index Range 1,00 to 1,75
Flow Rate 0,2 - 1,2 ml/min. 0,2 - 3,0 ml/min. 1,0 - 50 ml/min.
Flow Cell Volume 4 μl, 45° angle 9 μl, 45° angle 7 μl, 5° angle
Max. Flow Cell Pressure 6 kg/cm2
Dead Volume Into cell 6 μl Into cell 24 μl Into cell 88 or 353μl
Linearity Range 0-500 μl RIU 0-1000 μl RIU 0-20000 μl RIU
Noise Level 10 x 10-9 RIU 5 x 10-9 RIU 10 x 10-8 RIU
Autozero Range Full Range Full Range Full Range
Drift with 1ml H2O/min. < 1 mV/hour < 1 mV/hour < 1 mV/hour
Purge Valve yes yes Yes/No (depends on flow)
Integrator Output +/- 1 Volt
Recorder Output +/- 10 mV / 100 mV / 1Volt
Recorder Offset 0 mV/ 10 mV/ 100 mV
Recorder Range 8 steps (1:8) - (16:1)
Marker Yes / No
Digital Interface RS232 bidirectional, Purge, Autozero, Start, Stop
Digital Output TTL: Intensity Alarm
Digital Input TTL: Purge, Autozero, Start/Marker
Temperature Setting Ambient, 35°C to 55°C in 1°C steps, Thermal Fuse 75°C
Time Constant RAW (0,0 sec), Fast (0,4sec), Medium (0,8 sec), Slow (1,2 sec)
Power Source AC 100-120/220-240V, 50/60 Hz, 50VA
Dimensions in cm 220mm x 350mm x 155mm (W x D x H)
Weight 12 kg

RI 2000 detectors are available for: 

  • micro 
  • analytical 
  • semipreparative mode
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