Kern ORA 1SA Analogue Refractometer Salinity

The Kern ORA 1SA refractometer measures the concentration of salt solutions by measuring their ref...

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Product Information

Full details

The Kern ORA 1SA is an analogue manual refractometer designed for precisely measuring the salt concentration in various solutions, particularly in food production and preparation. Its key benefit is providing accurate, maintenance-free salinity measurements without complex calculations, thanks to its built-in, specially calculated scale and automatic temperature compensation. A caveat for users is that it requires manual operation and does not offer digital readouts or data logging capabilities.

All features

Model Part NumberORA 1SA
BrandKern

Extended Product Information

FAQs

What is the measurement range of the Kern ORA 1SA?

The Kern ORA 1SA measures salt concentration with a minimum of 0% and a maximum of 100%.

Does the ORA 1SA require batteries?

No, the Kern ORA 1SA is an analogue manual refractometer and does not require batteries.

How do I calibrate the refractometer?

Calibration involves placing a drop of the supplied calibration liquid on the prism, closing the cover, and reading the value. Adjustments are made using the small screwdriver provided, aligning the reading with the calibration liquid's known value on the scale.

Can I use this refractometer for sugar solutions?

No, the Kern ORA 1SA is specifically designed for salt concentration (salinity) measurements. For sugar solutions, a model with a Brix scale, such as the Kern ORA 32BA, would be appropriate.

What is included with the Kern ORA 1SA?

The refractometer is supplied with calibration liquid, a calibration block, a storage box, a pipette, a small screwdriver, and a cleaning tissue.

How does the automatic temperature compensation work?

ATC automatically adjusts the reading based on the ambient temperature, ensuring accuracy even if the temperature of the sample or the surrounding environment changes during measurement.

Is this refractometer waterproof?

The refractometer is not designed to be waterproof. It should be protected from immersion in liquids, and only the prism surface should come into contact with the sample.

Troubleshooting

Blurry or unreadable scale

Adjust the eyepiece focus until the scale is sharp. Ensure the prism and cover plate are clean.

Inconsistent readings

Ensure the prism and cover plate are completely clean and dry before applying the sample. Verify that the ambient temperature is within the operating range for ATC. Recalibrate if necessary.

Reading is significantly off the expected value

Recalibrate the instrument using the provided calibration liquid and block. Check if the correct scale is being used for salt concentration.

Unable to obtain a clear separation line

Make sure enough sample liquid is applied to cover the entire prism surface. Clean the prism and cover plate thoroughly.

Pros and Cons

Pros

  • Provides accurate salt concentration measurements.
  • Eliminates user calculation errors with a built-in calibrated scale.
  • Automatic Temperature Compensation ensures reliable readings in varying conditions.
  • Durable and robust construction suitable for demanding environments.
  • Simple, intuitive operation requiring no complex setup.

Cons

  • Analogue display requires manual reading and interpretation.
  • Does not offer digital output or data logging capabilities.
  • Requires careful handling to maintain accuracy.
  • Calibration requires a calibration liquid and block, which are supplied but need to be managed.

Setup, Compatibility & Care

Setup:

  1. Ensure the refractometer is clean. If not, use a soft, damp cloth to wipe the prism and eyepiece.
  2. For initial use or after storage, perform a calibration check using the supplied calibration liquid and block. Place a drop of calibration liquid on the prism, close the cover, and read the value against the scale. Adjust using the provided screwdriver if necessary.

Compatibility:

The Kern ORA 1SA is specifically designed for measuring salt concentrations (salinity). It is compatible with aqueous salt solutions. It is not designed for measuring viscous liquids or substances with high solid content.

Care:

  • After each use, clean the prism surface gently with a soft, damp cloth or the provided cleaning tissue. Dry thoroughly.
  • Avoid immersing the refractometer in water or other liquids.
  • Store the refractometer in its protective box in a cool, dry place.
  • Protect the prism from scratches; do not use abrasive materials for cleaning.
  • Ensure the eyepiece is clean for optimal viewing.

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