Bellingham + Stanley RFM900-T Refractometers

The RFM900-T Series of Peltier temperature controlled refractometers combine latest opto-electronic principles with durability and ease of use via a touchscreen user interface.  Offering a wide refractive index range and high precision measurement to six decimals RI, the RFM970-T version is ideal for use in pharmaceutical applications operating in accordance with Pharmacopeia and FDA regulation 21 CFR Part 11; as well as in petrochemical, chemical, and aroma applications.

  • Features
  • Specifications
  • Documents

RFM900 refractometers feature RFID (radio frequency identification) that allows users to identify themselves by simply swiping a tag across the top of the instrument to enable measurement and in certain cases, access to the configuration menu.

A new low profile sample dish and non-contact presser makes sample application and cleaning much easier than with its predecessor. Readings can be taken automatically on the replacement of the presser and up to 8000 stored results can be easily viewed in tabular form on the instrument display. Peltier temperature control and intelligent temperature management ensures readings are only taken when the sample and refractometer temperatures are both stable.

The instruments conform to a number of industry measurement standards and offer operational features that allow use in an environment controlled by FDA regulation 21 CFR Part 11. The use of a Kalrez® gasket and sapphire prism facilitates placement in the harshest measurement environments including those in the pharmaceutical, petrochemical, aroma, flavour, fragrance and other high RI sectors.

Flowcell versions are available.

Measurement Specifications
RFM960-T RFM970-T

Scales Refractive Index Sugar (°Brix) User-defined

1.30 – 1.70 0-100 Yes – 100 1.30 – 1.70 0-100 Yes – 100

Resolution Refractive Index Sugar (°Brix)

0.0001 / 0.1 0.000001 / 0.001
Accuracy Refractive / Index Sugar (°Brix) ±0.0001 / ±0.1 ±0.00002 / ±0.02
Presser Type Polyacetal Polyacetal
Temperature Compensation Sucrose (°Brix) AG Fluids User-defined 5 – 80 °C Simple coefficient (units/ °C) or polynomial function
Reading Time(s) Minimum 4 seconds
Temperature Stability Checks None/delay time/repeatability/Smart (independently selectable by Method)
Measuring Temperature Range 0 °C or 10 °C below ambient whichever is the greater to 80 °C
Temperature Sensor Accuracy ±0.03 °C
Sample Temperature Stability ±0.02 °C
Power Supply External 100-240V, 50-60Hz. Supplied with instrument
Physical Specifications
Prism Artificial Sapphire
Prism Dish 316 Stainless Steel / PEEK
Prism Seal Kalrez®
Interfaces 3 x USB (A), 1 x USB (B), ! x Ethernet, 1 x RS232
Sample Illumination Light Emitting Diode 589nm
Temperature Control Peltier
Order Codes
19-60 RFM960-T Refractometer including power supply and instructions
19-70 RFM970-T Refractometer including power supply and instructions
55-250 Waterproof Power Supply Unit
22-071 RFID Tags – pack of 3
22-072 RFID Tags – pack of 10