RFM900 Series RFM960-T Refractometer

Overview Specifications Industries & Applications Documentation & Tools ; Technology


Product Features
  • Easy clean prism
  • Wide Range – 1.30 to 1.70 RI
  • RI Resolution – 0.0001
  • Standard RI and Brix range
  • User Scale Library
  • Wide Temperature Range
  • Peltier Temperature Control
  • SMART temperature stability
  • Auto read function

New larger, quieter fan

A single large fan helps to regulate temperature as part of the Peltier control system. Operating at low speeds creates less noise whilst still offering the same excellent temperature control you’d expect to find in a Bellingham + Stanley refractometer. Positioned at the base of the unit, the RFM900-T’s fan is designed to be protected from harsh environments, whilst still being easily accessible for maintenance.

Touchscreen display & RFID technology

Inherent to the new design is the new high definition, capacitive touchscreen display that not only facilitates operation in factory environments, even when operated whilst wearing gloves, but also serves as the centrepiece for the new software. Combined, the touchscreen and GUI help the operator quickly manoeuvre through the user and configuration menus. On-screen graphical prompts support simple operation such as method loading, calibration and routine maintenance.

RFID swipe technology comes as standard, providing clearance and a log of operator and configuration functions – especially useful when being used in FDA-regulated environments operating in accordance with 21 CFR Part 11, or where good practice is adopted, e.g. as part of HACCP.   



Refractive Index
Sugar (°Brix)
Refractive Index
Sugar (°Brix)
Refractive Index
Sugar (°Brix)
Refractive Index
± 0.00005
Sugar (°Brix)
± 0.05
Temperature Compensation
Sucrose (°Brix)
5 – 80 °C
AG Fluid
5 – 40 °C
User Defined
Simple coefficient (units/°C) or polynomial function
General Specifications
User Scale Library
20+ pre-programmed scales including HFCS (3), sugar (4), sucrose SG (3), ASTM D 2140, PHR-MEAN, Urea and more; plus customer programmable user scales via PC.
Reading Time
Minimum 4 seconds (dependant on precision required)
Measuring Temperature Range
0°C or 10°C below ambient whichever is greater to 80°C
Temperature Sensor Accuracy
± 0.03°C
Sample Temperature Stability
± 0.02°C
Temperature Stability Checks
None/delay time/repeatability/ Smart (independently selectable by Method)
Sample Illumination
Light Emitting Diode 589nm (100,000+ hours)
Prism / Dish
Artificial Sapphire / Stainless Steel 316 / PEEK (spill barrier)
Prism Seal
3 x USB (A), 1 x USB (B), 1 x Ethernet, 1 x Serial (RS232)
Instrument: 24 V DC, ±5%, <2A External PSU: 100-240V, 50-60Hz (supplied)
Humidity Range
<90% RH (non condensing)
Industries & Applications

Industries & Applications

Recommended Industries and Applications

Documentation & Tools

Documentation & Tools




Measurements with the RFM900-T are made through a familiar measuring mode or by way of a simple Methods system with one-touch configuration of scale, temperature and data storage, with up to 4000 results being saved alongside pre-set limits that can be used as an audit tool. Methods may be user-defined or selected from the on-board library, such as the PHR-MEAN method that allows a number of individual readings from a single batch of pharmaceutical product to be measured with the resultant mean being displayed and recorded in accordance.

Methods for petrochemical applications include ASTM D 1218, D 1747 and D 5006. Additionally, a method is included for ASTM D 2140 that requests external data input of viscosity, density and relative density so that calculation of carbon-type composition of electrical insulating oil used to cool high-power transformers may easily be calculated without the need to visually interpret difficult correlation charts.

RFM900-T Series refractometers are supplied with free software for your PC so that when connected to a network via Ethernet connection, the instrument can be remotely handed by an external service or support centre for diagnostics or even be used for training or installation qualification.

USB ports are standard and facilitate connections to peripherals including an external keyboards, barcode readers or memory sticks. Memory sticks can be used to transfer secure files or as part of a “Back-up & Clone” process that allows rapid configuration interchange across a number of instruments at a customer site or for setting up hire equipment on loan for a short period of time.