REFRACTOMETERS

All refractometers are made and tested to the highest standards using Bellingham + Stanley’s 100 years of experience in the field of refractometry; so whether you require a high-end digital touchscreen refractometer for measuring chemicals in a lab, or a handheld refractometer for measuring honey at a beehive you can feel confident you have the right instrument for the job. 

RFM-x2

Laboratory Refractometers

For accurate measurement of concentration. High quality digital benchtop refractometer for use in your laboratory or factory.

handheld

Handheld Refractometers

Fast concentration measurement in the palm of your hand. Refractometers that can be used in almost any environment.

Bellingham + Stanley Digital Refractometer RFM340-M with Peltier Temperature Control and Keypad

BaS-1945-RFM340M-lab_refrac-front

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 & 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 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 combined with our latest GUI, help the operator quickly manoeuvre through the menus. On-screen prompts support simple operation such as Method loading, calibration and routine maintenance guiding even the newest member of your staff.

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. 

Measurements with the RFM300-M 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 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. As an 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.

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  • SpecificationsRFM330-MRFM340-M
    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 Library20+ 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 TimeMinimum 4 seconds (dependant on precision required)
    Measuring Temperature Range0°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 ChecksNone/delay time/repeatability/ Smart (independently selectable by Method)
    Sample IlluminationLight Emitting Diode 589nm (100,000+ hours)
    Prism / DishArtificial Sapphire / Stainless Steel 316 / PEEK (spill barrier)
    Prism SealSilicon/Resin
    Interfaces3 x USB (A), 1 x USB (B), 1 x Ethernet, RS232 via USB adaptor (optional accessory)
    PowerInstrument: 24 V DC, ±5%, <2A 
    External PSU: 100-240V, 50-60Hz (supplied)
    Humidity Range<90% RH (non-condensing)

Digital Refractometer, Peltier, Touch, RFM340-T, Bellingham + Stanley

BaS-1940-RFM340T-lab_refrac-front

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

  • 7” High definition touchscreen display.

  • Flat prism surface for easy-cleaning.

  • Wide beam scan for non-homogenous samples.

  • Three decimal place Brix precision* (6 d.p. RI).

RFM300-T Series refractometers are designed specifically for use in harsh environments and builds upon Bellingham + Stanley’s 100 year legacy of quality instrumentation. Incorporating wide beam optics, RFM300-T 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 instrument’s 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.

Inherent to the design is the high definition, capacitive touch-screen display that not only facilitates operation in factory environments, even when operated whilst wearing gloves, but also serves as the centrepiece for the 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. 

Measurements with the RFM300-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 8000 results being saved alongside pre-set limits that can be used as an audit tool.

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  • SpecificationsRFM330-TRFM340-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 Library20+ 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 TimeMinimum 4 seconds (dependant on precision required)
    Measuring Temperature Range0°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 ChecksNone/delay time/repeatability/ Smart (independently selectable by Method)
    Sample IlluminationLight Emitting Diode 589nm (100,000+ hours)
    Prism / DishArtificial Sapphire / Stainless Steel 316 / PEEK (spill barrier)
    Prism SealSilicon/Resin
    Interfaces3 x USB (A), 1 x USB (B), 1 x Ethernet, RS232 via USB adaptor (optional accessory)
    PowerInstrument: 24 V DC, ±5%, <2A 
    External PSU: 100-240V, 50-60Hz (supplied)
    Humidity Range<90% RH (non-condensing)

Bellingham + Stanley Digital Refractometer RFM960-T and RFM970-T with Peltier Temperature Control and Touchscreen

BaS-1970-RFM970T-lab_refrac-front
  • High precision Peltier temperature controlled benchtop refractometer, featuring a wide measuring range (1.30-1.70 RI) and 7” touchscreen user interface. Ideally suited for use in applications within the chemical, petrochemical, pharmaceutical, flavours and fragrance industries as well as in academic research.

    • Easy clean prism.
    • Wide Range – 1.30 to 1.70 RI.
    • Up to 6 decimal places RI.
    • Wide Temperature Range.
    • Peltier Temperature Control.
    • 7” High definition touchscreen.
    • Temperature Stability Checks.
    • RFID user clearance.
    •  

    The RFM900-T Series refractometers are high precision instruments for use within petrochemical, pharmaceutical, flavours and fragrance industries. The ergonomically designed cases deal with any spills by the sloping shape of the case or by the PEEK spill barrier that surrounds the shallow, easy-clean stainless steel prism dish. The prism dish is shaped to hold sufficient sample for measurement whilst regaining a large enough surface area for rapid temperature stabilisation to occur. A Kalrez® gasket has been chosen as the prism seal due to its almost impermeable nature to most chemicals. The sample cover forms a seal to prevent evaporation, particularly important when working with volatile solutions such as aromatic oils, and is interchangeable so that a presser type can be fitted for more viscous samples.

    Inherent to the design is the 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.  

    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.

  •  
  • Specifications
    Measurement Specifications
     RFM960-TRFM970-T
    Scales
    Refractive Index
    Sugar (°Brix)
    User-defined

    1.30 – 1.70
    0-100
    100

    1.30 – 1.70
    0-100
    100
    Resolution
    Refractive Index
    Sugar (°Brix)

    0.0001
    0.1

    0.000001 (selectable up to 6 d.p.)
    0.01/0.001
    Accuracy
    Refractive Index
    Sugar (°Brix)

    ±0.0001
    ±0.1

    ±0.00002
    ±0.02 
    Precision
    Refractive Index
    Sugar (°Brix)

    ± 0.00005
    ± 0.05

    ± 0.000005 (6 d.p.)
    ± 0.005
    User Scale Library20+ 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 TimeMinimum 4 seconds (dependant on precision required)
    Measuring Temperature Range0°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 Compensation
    Sucrose (°Brix)
    AG Fluid
    User Defined

    5 – 80 °C
    5 – 40 °C
    Simple coefficient (units/°C) or polynomial function
    Temperature Stability ChecksNone/delay time/repeatability/ Smart (independently selectable by Method)
    Sample IlluminationLight Emitting Diode 589nm (100,000+ hours)
    Prism / DishArtificial Sapphire / Stainless Steel 316 / PEEK (spill barrier)
    Prism SealKalrez®
    Interfaces3 x USB (A), 1 x USB (B), 1 x Ethernet, RS232 via USB adaptor (optional accessory)
    PowerInstrument: 24 V DC, ±5%, <2A 
    External PSU: 100-240V, 50-60Hz (supplied)
    Humidity Range<90% RH (non condensing)

Bellingham + Stanley Digital Refractometer RFM732-M with ATC and Keypad

BaS-1919-RFM732M-lab_refrac-front

Robust 0-100 Brix refractometer. Designed with simplicity in mind, RFM700-M Series refractometers with Brix, RI scales as standard offer digital automatic technology at a low cost.

  • Alpha-numeric keypad for easy data entry.
  • Flat sapphire prism surface for easy-cleaning.
  • Simple operation for factory environments.
  • Selectable read type: Continual, single, intelligent auto-sense.
  •  

Robust 0-100 Brix refractometer. Designed with simplicity in mind, RFM700-M Series refractometers with Brix, RI scales as standard offer digital automatic technology at a low cost.

RFM700-M Series refractometers are robust, low cost, fully automatic instruments that are ideally suited to the food, sugar and beverage industries but can also be used in many other non-food applications where temperature control is not required, for example measuring sugar (°Brix) concentrations in the food processing industry.

The RFM712-M Series features robust construction, a sapphire prism mounted in an easy clean stainless steel dish and an outer casing that is sealed and shaped to withstand sample spillage and moisture ingress. This together with the external power supply makes the RFM700-M ideal for use in a harsh factory environment or busy laboratory.

Commonly, the RFM700-M series refractometers are supplied to operate in the °Brix scale with results temperature compensated to 20°C in accordance with ICUMSA. Additional user scales provide measurement in different formats such as various wine, Refractive Index (RI) & FSII as well as allowing custom scales to be loaded in accordance with product data.

The RFM700-M facilitates Span calibration at any value using a variety of media types, as temperature compensation may be adjusted to suit the product being used. Additionally, the instruments are fitted with AG temperature compensation, allowing the use of AG Fluids without the need to use conversion table.

  •  
  • SpecificationsRFM712-MRFM732-MRFM742-M
    Scales
      Refractive Index
      Sugar (°Brix)
      User-defined 

    1.32 – 1.42
    0-50
    100

    1.32 – 1.54
    0-100
    100
    1.32 – 1.54
    0-100
    100
    Resolution
      Refractive Index
      Sugar (°Brix)
    0.0001
    0.1
    0.0001
    0.1
    0.00001
    0.01
    Accuracy
      Refractive Index
      Sugar (°Brix)
    ±0.0001
    ±0.1
    ±0.0001
    ±0.1
    ±0.00005
    ±0.04
    Precision (Reproducibility)
    Refractive Index
    Sugar (°Brix)
    ± 0.00005
    ± 0.05
    ± 0.00005
    ± 0.05
    ± 0.00001
    ± 0.01
    User Scale Library20+ pre-programmed scales including HFCS (3), Sugar (4), Honey, NaCl, Wine Must (5), Urine SG (3), Glycol (2), Urea, FSII and more; plus customer programmable user scales via PC.
    Reading TimeMinimum 4 seconds (optional time delay)
    Temperature ControlNone – Automatic Temperature Compensation (ATC)
    Temperature CompensationICUMSA, AG, User, none
    Sample Temperature Range0-100 °C
    Measuring Temperature Range5-40 °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 ChecksDelay in seconds or none
    Sample IlluminationLight Emitting Diode 589nm (100,000+ hours)
    Prism / DishArtificial Sapphire / Stainless Steel 316 / PEEK (spill barrier)
    Prism SealSilicon/Resin
    Interfaces1 x USB (A), 1 x USB (B), RS232 via USB adaptor (optional accessory)
    PowerInstrument: 24 V DC, ±5%, <1A 
    External PSU: 100-240V, 50-60Hz (supplied)
    Humidity Range<90% RH (non-condensing)

Optical Refractometer, Abbe 5, Bellingham + Stanley

BaS-44501-ABBE5-lab_refrac-front

General purpose optical refractometer for RI & dispersion measurement. 

Our Abbe 5 refractometer offers affordable direct measurement of refractive index & Brix and is ideal for academia as well as within use in industry. 

The Abbe Refractometer derives its name from the 19th Century physicist Ernst Abbe (1840-1905). Abbe designed an instrument for measuring the dispersion of light and this became the precursor for the so-called ‘Abbe Refractometer’.

Specification

Abbe 5

Scale
Refractive Index
Sugar (°Brix)


1,30 – 1,70
0 – 95

Resolution
Refractive Index
Sugar (°Brix)


0,0005
0,1

Operating temperature

5–70 °C

Temperatue resolution

0.1°C

Ambient temperature

5-40°C

Power supply (temperature)

Battery (1 x 1.5V AA alkaline). Approx. life 12 months continual use. 

Digital Handheld Refractometer, OPTi® Brix 54, Bellingham + Stanley

BaS-38XX-OPTi-hand_refrac-front_hand

OPTi Refractometers – Compact digital Brix refractometers for measurements on-the-go.

Our OPTi® digital handheld refractometers are high quality, UK made, simple-to-use, accurate, pocket sized refractometers offering measurement between 0-95 Brix depending on which instrument you choose.

OPTi refractometers are constructed using the latest manufacturing techniques. Stainless steel injection moulding to form the easy clean prism dish and ultrasonic welding to bond the housing. Each OPTi displays information to the user via and easy-to-read LCD display, helping to make readings even easier than using a standard optical handheld refractometer.

The OPTi 54 is our most popular digital handheld refractometer, offering a range of 0-54 Brix. This scales is ideal for use within food and beverage applications, allowing testing and quality control over sauces, soft drinks, fruit ripeness and more.

Digital Handheld Refractometer, OPTi® Brix/NaCl, Bellingham + Stanley

BaS-38XX-OPTi-hand_refrac-front
  •  

    OPTi Refractometers – Compact digital Brix refractometers for measurements on-the-go.

    Our OPTi® digital handheld refractometers are high quality, UK made, simple-to-use, accurate, pocket sized refractometers offering measurement between Brix and NaCI.

    OPTi refractometers are constructed using the latest manufacturing techniques. Stainless steel injection moulding to form the easy clean prism dish and ultrasonic welding to bond the housing. Each OPTi displays information to the user via and easy-to-read LCD display, helping to make readings even easier than using a standard optical handheld refractometer.

Digital Handheld Refractometer, OPTi® Saline 28, Bellingham + Stanley

OPTi_saline

Compact digital Saline refractometers for measurements on-the-go. Our OPTi® digital handheld refractometers are high quality, UK made, simple-to-use, accurate, pocket sized refractometers.

OPTi refractometers are constructed using the latest manufacturing techniques. Stainless steel injection moulding to form the easy clean prism dish and ultrasonic welding to bond the housing. Each OPTi displays information to the user via and easy-to-read LCD display, helping to make readings even easier than using a standard optical handheld refractometer.

The OPTi Saline 28 is a single scale digital refractometer calibrated in saline percent (%concentration) using NaCl data from the CRC handbook of Chemistry and Physics. This durable, digital instrument can be used for testing pure saline solutions – particularly useful within food processing such as canning vegetables, spraying meat, etc.

Digital Refractometer, Peltier, Touch, RFM990-AUS, Bellingham + Stanley

BaS-1970-RFM970T-lab_refrac-front

The RFM990-AUS32 is an extremely high accuracy refractometer specifically designed to meet the stringent needs of the chemical manufacturing industry. Of particular interest is its compliance with the strictest of ISO procedures in relation to the manufacture of urea-based NOx reduction agents used as Diesel Exhaust Fluids, also known as DEF, AUS32 and AdBlue®.

  • Widest RI range.
  • Highest precision (±0.000005 RI).
  • MEAN Method (USP/EP/BP).
  • All RFM900s conform to ASTM D 1218, 1747, 2140 & 5006.
  • Petrochemical model.
  • Premium performance.
  • Conforms to ISO 22241.
  • AUS32 Method (input criteria).
  •  

ISO 22241 dictates the highest level of measurement must be achieved under the tightest limits of temperature control. In addition to the compliance with this norm, the RFM990-AUS32 is fitted with specific Urea scales and temperature compensation as well as an AUS32 Method that allows input of both the F factor and biuret content of the solution that is included in the analysis.

Being part of the RFM900 series of refractometers, users of the RFM990-AUS32 also benefit from common features such as RFID user identity/clearance, on-board data storage, limit checking and audit trails.

No matter how good the instrument performance, without good verification it is not possible to confirm the instrument meets the specification laid down in ISO 22241. Bellingham + Stanley offer a UKAS Certified Reference Material for this purpose at the equivalent RI value of Urea stated in the norm.

 
  • Measurement Specifications
     RFM990-AUS32

    Scales
    Refractive Index (RI)
    % Urea mass/mass (AUS32)

    1.33 – 1.70
    0-40

    Resolution 
    Refractive Index
    % Urea mass/mass (AUS32)

    0.000001
    0.01

    Accuracy 
    Refractive Index
    % Urea mass/mass (AUS32)

    ±0.00002
    ±0.02

    Precision 
    Refractive Index 
    % Urea mass/mass (AUS32) 
    ±0.000005 
    ±0.005 
    Other ScalesUser defined – Urea % (AUS32), DEF, FSII  etc. or custom scales, loaded by PC software
    Automatic Temperature CompensationUrea, ICUMSA (sugar), AG, None or User Defined
    Temperature ControlInternal Peltier Device
    Temperature Accuracy ±0.02 °C (at 20 °C)
    Temperature Stability±0.01 °C (at 20 °C)
    Working Temperature Range

    0 °C or 10°C below ambient which ever is the greater to 80°C
    (for AUS32 performance – 20°C is mandatory)

    Temperature Stability Checks

    None/delay time/repeatability/Smart
    (independently set by Method)

    Sample Temperature Range20 to 30 °C
    Reading Time (seconds)15
    Ambient Humidity Range< 90% RH
    Physical Specifications
    PrismArtificial Sapphire
    Prism Dish316 Stainless Steel 
    Interfaces3 x USB (A), 1 x USB (B), 1 x Ethernet, RS232 via USB adaptor (optional accessory)
    Sample IlluminationLight Emitting Diode (life 100,000hr +) 589nm
    Case MaterialABS
    Prism GasketKalrez®

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