Digital refractometers measure the refractive index of a gel, liquid or solid sample to in order to determine the sample’s concentration. Since more concentrated samples bend light at a larger angle, digital refractometers operate by illuminating the sample against a prism and digitally measuring the angle of refracted light with photodiode detectors. Digital refractometers are used to measure a variety of substances, from the concentration of sugar in grape juice to the purity of solvents, and are widely employed in production and quality control applications in the food, chemicals and pharmaceutical industries. Digital refractometers may be designed for manual, semi-automatic or fully automatic sample reading. Compared to an analog instrument, a digital refractometer offers quick and extensive selection between measurement units and easily exports results. The upper and lower reading limits vary significantly between digital refractometer models. Temperature-controlled digital refractometers, for ranges up to 10 to 120°C, provide better accuracy by compensating for the changes in a sample’s refractive index caused by heat or cold. Handheld digital refractometers offer convenience but may be less accurate and require larger sample sizes compared to desktop instruments. Some digital refractometer models are designed for specific applications with more limited capabilities but optimized performance.
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| Company | Mettler-Toledo GmbH | Mettler-Toledo GmbH | Mettler-Toledo GmbH |
| Item | Excellence Refractometers | Refracto 30GS Extended RI Measuring Range Refractometer | Refracto 30PX Portable Refractometer |
| Reviews | | | |
| Catalog Number | Excellence Refractometer Series | Inquire | Inquire |
| Price | | | |
| Description | Performance Meets Simplicity
Developed for a wide range of applications, the intuitive Excellence Refractometers will measure almost any sample. The instruments feature a high accuracy and repeatability and can be further enhanced with the following solutions:
- Wide range of measurement scales,
Performance Meets Simplicity
Developed for a wide range of applications, the intuitive Excellence Refractometers will measure almost any sample. The instruments feature a high accuracy and repeatability and can be further enhanced with the following solutions:
- Wide range of measurement scales, including nD, Sugar (Brix / other), Chemical, Freezing point and more
- Powerful autosamplers for viscous and difficult samples
- Simultaneous determination of refractive index, density, pH/conductivity and color
- LabX PC software for compliance with 21 CFR Part 11
- Wide range of accessories
... Read More | Refracto is a hand-held and a benchtop refractometer in one.You either place the instrument on a flat surface and add a drop of sample onto the measurement cell or immerse the cell directly into the sample.
Features
Sapphire prism
Refracto determines refractive index using the total reflection Refracto is a hand-held and a benchtop refractometer in one.You either place the instrument on a flat surface and add a drop of sample onto the measurement cell or immerse the cell directly into the sample.
Features
Sapphire prism
Refracto determines refractive index using the total reflection method. The prism of the Refracto 30GS is made of sapphire and held by a ring of hard gold plated brass. Sapphire has a higher refractive index and a better thermal conductivity than glass. For this reason the Refracto 30GS has an extended measuring range and registers the sample temperature more quickly.
Refracto even measures dark samples correctly. You no longer need to rely on error-prone readings of dark/bright transitions as with optical instruments.
Temperature compensation
The refractive index of a sample depends on temperature. During measurement, Refracto determines the temperature and then corrects the refractive index to a standard temperature of 20 °C or any other temperature the user defines. To make quick measurements of different types of samples, you can easily switch between up to 10 user defined correction coefficients.
Plain language interface
The backlit LC-Display of Refracto shows your results and settings in plain language. The simple and intuitive menu structure allows you to change the settings within seconds. You hardly need an instruction manual.
Ease-of-use
The clearly labelled keyboard makes operation easy and efficient. As soon as you press the measurement key, the result is displayed in the desired units on the backlit LC-Display.
Comprehensive result storage
Refracto stores up to 1100 results including sample identification, measurement unit, temperature compensation coefficient, date and time.
Transfer your data whenever you want
You can transfer the data (together with an instrument identification) to a PC or printer any time using the infrared interface of the instrument. For this purpose an infrared / RS232 converter (51325006) is required. Appropriate PC software comes with the instrument.... Read More | Refracto is a hand-held and a benchtop refractometer in one.You either place the instrument on a flat surface and add a drop of sample onto the measurement cell or immerse the cell directly into the sample.
Features
Glass prism
Refracto determines refractive index using the total reflection method. Refracto is a hand-held and a benchtop refractometer in one.You either place the instrument on a flat surface and add a drop of sample onto the measurement cell or immerse the cell directly into the sample.
Features
Glass prism
Refracto determines refractive index using the total reflection method. The glass prism of the measurement cell is held by a stainless steel ring.Refracto even measures dark samples correctly. You no longer need to rely on error-prone readings of dark/bright transitions as with optical instruments.
Temperature compensation
The refractive index of a sample depends on temperature. During measurement, Refracto determines the temperature and then corrects the refractive index to a standard temperature of 20 °C or any other temperature the user defines. To make quick measurements of different types of samples, you can easily switch between up to 10 user defined correction coefficients.
Plain language interface
The backlit LC-Display of Refracto shows your results and settings in plain language. The simple and intuitive menu structure allows you to change the settings within seconds. You hardly need an instruction manual.
Ease-of-use
The clearly labelled keyboard makes operation easy and efficient. As soon as you press the measurement key, the result is displayed in the desired units on the backlit LC-Display.
Comprehensive result storage
Refracto stores up to 1100 results including sample identification, measurement unit, temperature compensation coefficient, date and time.
Transfer your data whenever you want
You are free to transfer the data (together with an instrument identification) to a PC or printer any time using the IR interface. For this purpose an infrared / RS232 converter (51325006) is required. Appropriate PC software comes with the instrument.... Read More |
| Refractive Index Range | Inquire | 1.32 to 1.65 | 1.32 to 1.50 |
| Brix Range | 0 to 100 %w/w | 0 to 85% | 0 to 85% |
| Resolution | Inquire | 0.1% (Brix), 0.0001 (RI) | 0.1% (Brix), 0.0001 (RI) |
| Temperature Range | 5 to 75°C (32 to 203°F) | 10 °C to 40 °C | 10 °C to 40 °C |
| Optical Wavelength | Inquire | Inquire | Inquire |
| Measuring Time | Inquire | Inquire | Inquire |
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