Description
Analogue refractometer KERN ORA 4FA is a universal, maintenance-free handheld instrument for refractive index measurement in laboratory and industrial practice. As part of the KERN ORA-F series, it offers a compact, robust build for simple, efficient long-term use. Multiple selectable scales remove the need for manual conversion and help avoid application errors; the scales are specially developed, precisely calculated and verified, with very thin, clear lines. The optical system and prism cover are manufactured from materials that support low-tolerance measuring. Automatic temperature compensation (ATC) provides accurate readings at ambient temperatures from 10 °C to 30 °C, and the eyepiece adjusts smoothly to different visual acuities. This model is particularly suited to measuring glycol concentrations, battery fluid (BF) and the freezing point of windscreen washer fluid (CW), as well as temperature-exchange systems. Main application areas include the automotive, chemical and solar industries (antifreeze control). Supplied by manufacturer Kern with storage box, calibration solution, pipette, screwdriver and cleaning cloth; further accessories are optional. Pack size is 1 pc.
This article is part of Refractometers & polarimeters, in Spectroscopy & photometry.
Key features
- Pack size: 1 pc
- Product type: Analogue handheld refractometer
- Series: KERN ORA-F
- Temperature compensation: Automatic (ATC), 10 °C – 30 °C
- EAN: 4045761483132
- Technical Information Sheet:
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Questions about Analogue Refractometer KERN ORA 4FA
What is this article?
Analogue Refractometer KERN ORA 4FA is the article on this page. Luminix Health distributes KERN for laboratory use. It sits in Refractometers & polarimeters, inside Spectroscopy & photometry, in Instruments de laboratoire.
A refractometer reads the refractive index of a liquid, often expressed as Brix for sugar. A polarimeter reads the rotation of polarised light. Both depend on temperature. A handheld refractometer and a thermostated benchtop instrument are different accuracies.
A photometer or spectrophotometer sends light through a sample and reads how much was absorbed. In the range where the Beer–Lambert relation holds, absorbance tracks concentration. A refractometer reads how a liquid bends light, which tracks dissolved solids. A polarimeter reads the rotation of polarised light, the classical measurement for sugars. The lamp, the wavelength and the cuvette path length are the three things that have to be right before the number means anything. The optical quantities trace to NIST and the BIPM.
Which category should I open next?
The category is Spectroscopy & photometry. The sub-category is Refractometers & polarimeters. The catalogue is Instruments de laboratoire.
Shelves beside this one are Photometers & spectrophotometers and Lamps, cuvette holders & accessories.
What should I check before I order?
When this page shows a safety data sheet, use that manufacturer file. Hazard text does not belong in the sales description. For a pack size, a grade or a certificate that is not on the page, send a quote request or contact the team.
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Luminix Health distributes this article from the heart of Europe. Articles in stock ship within 2–5 business days. Standard delivery is free from €250 excl. VAT. Cold-chain goods and dangerous goods under ADR are never included in that free delivery. The terms are in the Shipping Policy. The full brand index is on shop by brand. Who we are is on about us.
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The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.