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Digital refractometer, RFM990

Supplier: Bellingham + Stanley
The RFM990 is a wide range Peltier temperature controlled refractometer, that has been adapted for use with samples under flow conditions, ensuring that the sample is presented to the prism without entrapped air.

  • Navigate applications with two point calibration
  • Wide range with choice of four or five decimal place accuracy
  • Radio frequency identification (RFID) operator identification and protection

Micro-flowcells are used to transfer volatile or limited volume low viscosity liquids as part of a single or multiple instrument analysis, incorporating an autosampler and pump within the beverage, brewing, flavours, fragrance or essential oil industries.

Macro flowcells are used where sample viscosity limits the use of micro-flowcells or for connection to a pilot plant or smallbatch process line, where a normal process refractometer may not be suitable.

Funnel flowcells may be used where larger volumes of sample are available. These cells negate the need to clean the instrument prism between sample measurements, providing a rapid sample turnaround, such as in Tare Houses of grape growers co-operatives and sugar mill receiving stations.

Delivery information: The flow cells must be ordered separately.



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Description Model Range Refractive index Pk VWR Catalog Number Quantity
Digital refractometer, UK plug RFM990 0 − 100 °Bx 1,30 − 1,70 nD 1 BELL22-90-61-191
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Reading time 4 s
Temperature sensor ±0,03 °C
ATC Simple coefficient or polynomial function
Temperature stability ±0,05 °C
Temperature measurement 5 − 80 °C
Memory 700 values
Interfaces 2× RS232 and parallel printer
Light source LED 589 nm for over 100 000 hours
Electrical 100 - 240 V/50 - 60 Hz
W×D×H 210×300×160 mm
Weight 4,7 kg


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Description Pk VWR Catalog Number Quantity
RFID tags – pack of 3 3 635-0493
RFID tags – pack of 10 10 635-0494
Replacement filters (standard) 20 635-0444
Replacement filters, EPP (enhanced protection pack) type 20 635-0443
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