KERN analog refractometers ORA-E (expert applications)
The KERN ORA-E analog refractometers offer a generous measuring range and are specially designed for professionals who need accurate and reliable results. Thanks to their robust design and the ability to read several scales simultaneously, these instruments impress with their high efficiency and measuring accuracy. In comparison to digitized versions, similar devices such as the [KERN Digital Refractometer DRB Series] convincingly demonstrate that different temperature environments can be compensated for via automatic compensation. With the analog series presented here, you benefit from maintenance-free mechanics and a clear reading, making it a reliable solution in the laboratory or production environment.
Description
This series of analog handheld refractometers covers a wide range of Brix values and refractive index measurement ranges. Thanks to their specially developed and extremely fine measuring scales, they are able to capture large value ranges quickly and accurately without the risk of misinterpretation. The convenient rotary mechanism for adjusting the eyepiece can be easily adapted to different visual acuities. Series such as ORA 80BE and ORA 90BE focus primarily on Brix measurements, while variants such as ORA 1RE and ORA 4RR are tailored to the refractive index.
The optional "ATC" (Automatic Temperature Compensation) feature on individual models, which reduces dependence on ambient temperatures and guarantees consistently high measurement accuracy, is particularly noteworthy. The practical application includes a storage container, a calibration solution, a pipette, a screwdriver and a cleaning cloth. This provides everything you need to use the device easily and reliably.
Important technical features at a glance:
- Large display for Brix or refractive index, as required
- Finely scaled graduation (down to 0.2 % Brix or 0.001 nD)
- Various measuring ranges (0-50 % Brix, 50-80 % Brix, 0-42 % Brix, 42-71 % Brix, 71-90 % Brix, 1.333-1.405 nD, 1.405-1.468 nD, 1.468-1.517 nD, 1.440-1.520 nD)
- Stable mechanics and durable designs for frequent use
- Measuring surface focused on the essentials and easy to clean
- Manual or, on some models, automatic temperature compensation
- Maintenance-free optics with adjustable eyepiece
The graduated measuring ranges offer a wide range of application options - from measuring solutions containing sugar to checking various media in the laboratory. Precise processes are particularly important for substances with a high solids content (e.g. fructose solutions) or when determining the alcohol content via Brix derivations. With these refractometers, users also appreciate the fact that errors caused by manual conversions can be avoided. A clear scale division supports error-free evaluation.
Certifications and standards
The analog refractometers in this series are designed for high precision in laboratory and industrial applications and comply with the current standards for measurement technology. Compliance with operational quality assurance guidelines ensures that accurate results can be achieved continuously. They are often part of QA systems in accordance with DIN ISO, making them a reliable solution in a wide range of industries.
Examples of applications
- Checking concentrations in fruit juice and sugar production: Brix values precisely indicate the sugar content.
- Measurement of cooling lubricants in metalworking: The exact concentration ensures process stability.
- Determination of refractive indices in chemical laboratories: From organic solvents to resins.
- Quality control in the food industry: Determining the density and purity of various liquids.
FAQs
How often does the device need to be calibrated?
Calibration should be carried out at regular intervals or before each critical measurement. The calibration solution supplied makes this process much easier.
Is the refractometer suitable for very viscous samples?
Yes, as long as the medium is optically clear. It is generally advisable to apply a thin layer to the prism to avoid air bubbles.
Can I also use the device in environments with strongly fluctuating temperatures?
If you use a model with ATC function, the measurement accuracy is maintained even with changing temperatures, as the integrated temperature compensation compensates for deviations.
How does the refractometer react to acids or aggressive chemicals?
The specially coated prism cover and the robust housing ensure a high resistance to chemicals. Nevertheless, careful cleaning is recommended after each use.
Conclusion
The range of handheld refractometers presented here impresses with its finely graduated scales, robust design and uncomplicated handling - ideal prerequisites for long-term, reliable use in laboratories, food production, chemistry and many other specialist areas. Thanks to different models, both Brix values and the refractive index can be measured precisely. Thanks to the wide range of available accessories, fast calibration and generous measuring ranges, the system also impresses with changing measurement requirements. Anyone looking for a maintenance-free, analog device will find this refractometer to be an easy-to-use solution with a high level of reliability.
