KERN analog refractometer ORA 1GG (gemology/gemstones)
This analog handheld refractometer is the ideal solution for professionals who need precise measurements of the refractive index of jewelry and gemstones. Thanks to its robust design and intuitive operation, it is ideal for everyday use in the jewelry industry and in education. Similar application scenarios to the [KERN handheld refractometer ORA 3BB] show that these measuring instruments are particularly effective in workshops, laboratories and training centers. Anyone looking for a reliable and versatile refractometer will find what they are looking for with this product from Kern & Sohn, as it guarantees high measurement accuracy and durability thanks to its high-quality materials.
Versatile areas of application and functionality
The device is specially designed for the analysis of gemstones and jewelry and covers a refractive index range of 1.30 to 1.81 nD. This makes it possible to determine a wide range of materials used in the jewelry trade and in research. The greatest advantage lies in the clearly legible scales with a measuring system that allows uncomplicated assignment of the measurement results. In addition, the universally applicable scale minimizes conversion errors by largely eliminating the need for manual calculations.
The following product features offer decisive advantages for everyday use:
- Easy adjustment: Thanks to the integrated eyepiece, the display can be quickly and precisely adjusted to different visual acuities.
- Solidity: The optical system and the prism cover are made of high-quality materials that ensure accurate measurement of the refractive index.
- Robustness: The design is such that the refractometer can easily withstand repeated use in workshops or laboratories.
- Maintenance-free: The manual design and the absence of electronic components make the device particularly durable and easy to maintain.
- Accuracy: A graduation of 0.010 nD enables a sufficiently fine resolution for common applications in gemmology.
In addition to these advantages, the device is supplied with practical accessories, including calibration solution, pipette, screwdriver and cleaning cloth. This means that immediate maintenance work, such as recalibrating before a measurement, can be carried out quickly and easily.
An overview of the key technical data
- Measuring range: 1.30 to 1.81 nD
- Graduation: 0.010 nD
- Scale: Refractive index (nD)
- Dimensions (WxDxH): 130 x 70 x 30 mm
- Gross weight: 810 g
- Net weight: 718.160 g
- Scope of delivery: Storage box, calibration solution, calibration block (if required), pipette, screwdriver, cleaning cloth
The product meets common industry standards in terms of precision and reliability. For most jewelers and jewelry manufacturers, it is also advantageous that the most important certifications in the refractometer segment are taken into account. These generally include technical standards for safety and accuracy, which ensures high quality in daily use.
Concrete application possibilities
- Material identification: Precise determination of the refractive index of gemstones such as diamonds, rubies or sapphires.
- Quality control: Analysis of various gemstones in workshops and laboratories to reliably assess their optical properties.
- Production: Support in production processes to check the suitability of rough stones.
- Training: Use in training programs, for example in jewellery or goldsmith academies, where an understanding of gemstone measurements is taught.
In many cases, substances such as cleaning fluids, oils for contact measurement or special polishing agents are used. Thanks to its compact form factor, the device can be easily integrated into learning settings and can also be demonstrated at trade fairs and specialist events.
Frequently asked questions (FAQ)
How is the device calibrated?
Calibration is carried out using the calibration solution (or calibration block) supplied. Simply apply a few drops to the prism, close the device and align the scale with the zero point using a screwdriver and eyepiece.
How often should you recalibrate?
In order to always obtain precise values, regular checks are recommended - especially before each new series of measurements or after a change in the working environment (changes in temperature and humidity).
Do I need special accessories for liquid measurements?
Not usually for jewelry analysis. The device is primarily intended for solid materials, although a suitable contact liquid can be advantageous for unambiguous refractive index determination. This is available as an option.
Is the device waterproof?
As it is an analog, maintenance-free refractometer, it is splash-proof and robust. However, it should not be submerged under water to protect the optical components.
How can I compensate for different visual acuities?
The eyepiece has a smooth adjustment option. This allows users to make their individual focus correction without having to use additional glasses.
Summary
This handheld refractometer from Kern & Sohn is a versatile measurement solution for gemstones and jewelry. From jewelry schools to jewelry manufacturers to laboratories, it is a reliable aid for qualitative and quantitative refractive index analysis. Thanks to robust materials, simple calibration and a comprehensive range of accessories, long-term, carefree use is guaranteed. Anyone looking for a precise and user-friendly method of testing the optical properties of gemstones will be well equipped with this device in their day-to-day work.
