Accurate refractive index measurement for laboratories and industry

Designed for professional use in laboratory and industrial environments, this model combines technical accuracy, ease of use and long-term durability in a maintenance-free handheld instrument.

Part of the trusted KERN ORA-F series, this universal manual refractometer is engineered to deliver fast and consistent measurements in daily operation. Its practical and durable construction ensures simple and efficient handling, while the selectable scales eliminate manual conversion work and significantly reduce the risk of interpretation errors.

The high-quality optical system and prism cover made from special materials enable measurements with very tight tolerances. The scales are specially developed, precisely calculated and thoroughly tested, and they stand out for their fine, sharp and easy-to-read lines. In addition, the device features automatic temperature compensation (ATC), ensuring accurate readings at ambient temperatures between 10 °C and 30 °C.

As an added advantage, newer models now include an engraved serial number for better traceability. All models are equipped with an eyepiece with scale and a smooth, simple adjustment option, allowing comfortable use for different eyesight levels.

Key benefits

• Fast and dependable analog reading for laboratory and field control tasks
• Integrated dedicated scales that avoid manual conversions and reduce operator error
• Automatic temperature compensation (ATC) for greater accuracy in varying ambient conditions
• Durable and robust construction for demanding professional use
• High-quality optics with fine, sharp lines for easier reading
• Maintenance-free operation, helping reduce downtime and operating costs

Recommended applications

The KERN ORA 4FA is particularly suitable for professionals who need to accurately assess the condition of technical fluids and anti-freeze protection in a wide range of systems. It is especially designed for measuring and determining glycol concentrations, battery liquids and cleaning water freezing points, while also being suitable for temperature checks in exchange systems.

• Automotive industry
• Chemical industry
• Photovoltaic industry
• Frost protection monitoring
• Inspection of technical liquids and industrial fluids

Included in delivery

• Storage case
• Calibration solution
• Pipette
• Screwdriver
• Cleaning cloth

Optional accessories are also available, allowing the instrument to be adapted to specific technical and operational requirements.

Technical specifications