Bellingham + Stanley RFM300+ Refractometer

RFM300+ series refractometers are considered by many leading companies as the ultimate instrument for installation in demanding factory environments as well as for use a a primary quality control tool.

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RFM300+ Refractometers

Since its original launch in 1992, over 7,500 models have been installed across the globe and following a complete re-design in 2008 and further developments to the hardware since then, the RFM300+ series of refractometers still offers all the original design attributes but with a wider refractive index range, Peltier temperature control and a more versatile software structure. A shallow, easy to clean prism dish houses a single sapphire prism optical system protected by a sample presser that may also be used to instigate a measurement without the need to press the read button. A large sampling area on the prism surface allows measurement of not only homogenous fluids like juices, sodas, sauces and edible oils but also difficult to read samples like fruit pulps and industrial resins.

Intelligent software

RFM300+ refractometer colour screen Intelligent software ensures rapid temperature response to change in prism temperature, whilst the SMART temperature stability check makes sure that the result is displayed only when the sample is stable. A Methods system allows rapid configuration of instrument setup and provides limit checks against stored data as well as product specific offsets and acid corrections. Over 4000 readings may be stored within the instrument memory and the on-screen menu may be displayed in a number of different languages.

The instrument is available in two formats, the most popular being the 2-decimal place RFM340+ refractometer, which following improvements to the thermodynamic control system, now has an increased measurement performance between 0-20°Brix and so reduces potential measurement error in the critical range covering finished products like the aforementioned juices and sodas. By improving the performance at the low end of the scale, users may now trim syrup dilution to the absolute minimum without the risk of breaching manufacturing specifications!

SG scales for sucrose are also common to the series. These scales may be used to express the relative density of pure sucrose solutions and when used in conjunction with a product offset from within the Methods system, can express finished beverages as an equivalent SG and by doing so, contract packers of beverage products may now use a refractometer in situations where density °Brix or SG is dictated as the method of analysis, whilst retaining all the measurement advantages held by a refractometer.

Additionally, all RFM300+ series refractometers have the ability to display the measured result in two scale formats such as a Brix value based on SG alongside the original refractive index measurement. Optional software is also available at point of order to allow use in an environment controlled by FDA regulation 21 CFR Part 11 as well as optional devices that allow use in wet and humid factory environments, offering ultimate protection under the worst of environmental conditions.

In June 2014, new 4" high definition full colour display were applied to RFM300+ refractometers with a new colour coded menu structure to help guide users through both the operation and configuration menus. Additionally latest technology USB & LAN connection is available allowing simple connection to networks and peripheral devices that provide new features such as Print to Secure PDF and back-up & clone making the RFM300+ series of refractometers one of the most versatile instruments in its field. New flowcell versions for rapid sample handing are also available

Specifications RFM330+ RFM340+
Scales
  Refractive Index
  Sugar (°Brix)
  User-defined (100 scales - configurable)

1.32 – 1.58
0-100
Yes

1.32 – 1.58
0-100
Yes
Resolution
  Refractive Index
  Sugar (°Brix)
0.0001
0.1
0.00001
0.01
Accuracy
  Refractive Index

  
  Sugar (°Brix)

±0.0001


±0.1

±0.00002 (1.32 – 1.36 RI)
±0.00004 (1.36 – 1.58 RI)

±0.01 (0 – 20 °Brix)
±0.03 (20 – 100 °Brix)
User Scale Library on-board 20+ preprogrammed scales including HFCS (3), wine (5), sugar (4), urine SG (3), Urea, sucrose SG (3), FSII, NaCl, Butyro etc.
Plus customer programmable scales by PC software.
Presser Type Polyacetal
Reading Time Minimum 4 seconds
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 ± 0.05 °C
Temperature Compensation
  Sucrose (°Brix)
  AG Fluids
  User-defined

5 – 70 °C
5 – 40 °C
Simple coefficient (units/ °C) or polynomial function
Temperature Stability Checks SMART, DELAY, NONE – independently selectable by Method
Ambient Humidity Range <90% RH

Physical Specification

Prism Artificial Sapphire (Single). 12mm sample area diameter
Prism Dish 316 Stainless Steel / PEEK
Prism Seal Silicon/Resin
Interfaces 3 x USB (A), 1 x USB (B), 1 x Ethernet, 1 x Serial (RS232)
Sample Illumination Light Emitting Diode (life 100,000hr +) 589nm
Temperature Control Peltier
Power Supply External 100-240V, 50-60Hz. Supplied with instrument

Order Code Description
22-30 RFM330+ Refractometer incl. standard power supply and instructions
22-40 RFM340+ Refractometerwith enhanced measurement performance incl. standard power supply and instructions
22-80 Enhanced Protection Pack
55-250 Waterproof Power Supply Unit (IP65)
26-155 Splash Cover
22-121 Optional on-board software and user license – 21 CFR Part 11 (factory option only at time of manufacture)
22-017 “Contact Presser” insert for jams and marmalades
Order Code Description
22-30 RFM330+ Refractometer incl. standard power supply and instructions
22-40 RFM340+ Refractometerwith enhanced measurement performance incl. standard power supply and instructions
22-80 Enhanced Protection Pack
55-250 Waterproof Power Supply Unit (IP65)
26-155 Splash Cover
22-121 Optional on-board software and user license – 21 CFR Part 11 (factory option only at time of manufacture)
22-017 “Contact Presser” insert for jams and marmalades