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Food & Beverage Quality Control Digital Refractometer RFM340-T

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Digital Refractometer RFM340-T with Peltier Temperature Control and Touchscreen Input

RFM340-M digital refractometer with 3-decimal / 0-100 Brix (1.58 RI) scales and Peltier control. Perfect for measurement and control in demanding food, beverage, chemical, and industrial applications.

  • Tactile and robust keypad
  • Flat prism surface for easy cleaning
  • Wide beam scan for non-homogenous samples
  • Three decimal place Brix precision* (6 d.p. RI)

RFM300-M Series refractometers are capable of measuring non-homogenous samples such as fruit juice with pulp, opaque chemical compounds and emulsions that are normally difficult to read with optical refractometers or those digital refractometers that do not address the need to measure “difficult samples.”

The Ease of the RFM340-M’s Design

The instrument’s new case is ergonomically designed so that any spills are dealt with by the sloping shape of the case or by the PEEK spill barrier that surrounds the shallow, easy-clean stainless steel prism dish.

With a durable membrane made from chemical and scratch-resistant polyester, the RFM300-M offers a more tactile approach, allowing users to navigate menus at the touch of a button.

The large, clear buttons and 4” high-resolution screen help facilitate operation in factory environments, and combines Bellingham + Stanley’s latest GUI, to help the operator(s) quickly manoeuvre through the menus. On-screen prompts support simple operations such as method loading, calibration, and routine maintenance.

RFID swipe technology comes as standard, providing:

  • clearance
  • a log of operator(s)
  • configuration functions

This is 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.

How It Works

Measurements with the RFM300-M are made through a familiar measuring mode or by way of a simple Methods system with the one-touch configuration of scale, temperature, and data storage, with up to 8000 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. For example, the ‘Coffee Solids’ Method allows for coffee type and daily offsets to be inputted, so that the %TS achieved using the refractometer in the factory match the results of the laboratory tests used to configure the freeze-drying process, producing instant coffee powder.

Specifications

Digital Refractometer RFM340-T

Specifications RFM330-T RFM340-T
Scales
Refractive Index
Sugar (°Brix)
User-defined
1.32 – 1.58
0-100
100
1.32 – 1.58
0-100
100
Resolution
Refractive Index
Sugar (°Brix)
0.0001 / 0.00001 (selectable)
0.1 / 0.01 (selectable)
0.000001 (selectable up to 6 d.p.)
0.01/0.001 (selectable up to 3 d.p.)
Accuracy
Refractive Index
Sugar (°Brix)
±0.00005

±0.04

±0.00002 (1.32 – 1.38 RI)
±0.00004 (1.38 – 1.58 RI)

±0.010 (0 – 30 °Brix)
±0.030 (30 – 100 °Brix)

Precision (Reproducibility)
Refractive Index
Sugar (°Brix)
± 0.00001
± 0.01
± 0.000005 (6 d.p.)
± 0.005 (3 d.p.)
User Scale Library 20+ pre-programmed scales including HFCS (3), sugar (4), sucrose SG (3), NaCl, Butyro, Wine Must (5), Urine SG (3), PHR-MEAN 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 70°C
Temperature Sensor Accuracy ± 0.03 °C
Sample Temperature Stability ± 0.05 °C
Temperature Compensation
Sucrose (°Brix)
AG Fluids
User-defined
5 – 80 °C
5 – 40 °C
Simple coefficient (units/ °C) or polynomial function
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 Silicon/Resin
Interfaces 3 x USB (A), 1 x USB (B), 1 x Ethernet, RS232 via USB adaptor (optional accessory)
Power Instrument: 24 V DC, ±5%, <2A
External PSU: 100-240V, 50-60Hz (supplied)
Humidity Range <90% RH (non-condensing)

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