From Lab to Field: The Only Handheld Refractometer with True Temperature Control

Discover the first handheld refractometer with true Peltier temperature control and four-decimal-place accuracy.

The Rudolph J27 Portable Refractometer, a groundbreaking tool that combines portability, advanced temperature control, and laboratory-level accuracy to redefine handheld refractometers. With over two decades of benchtop refractometer expertise, Rudolph has introduced a handheld device that delivers lab-quality precision wherever you need it. Enjoy untethered portability—take the J27 from the lab to the field or any on-site location without compromising performance.

The J27’s Peltier temperature control system ensures precise heating and cooling, stabilizing sample temperature at 20°C or 25°C for unparalleled accuracy. Unlike traditional handheld refractometers that rely on temperature corrections, the J27 controls the actual sample temperature, delivering the most precise measurements, even for challenging samples like industrial fluids and glycol. Built for rigorous use, the J27 features a synthetic sapphire prism, nearly as hard as diamond.

This ultra-flat, scratch-resistant surface is easy to clean and ensures consistent, reliable performance in any environment. The low-volume sample dish minimizes waste and reduces cross-contamination, making it ideal for high-throughput testing and working with precious samples. The bright LED touchscreen is highly visible in any lighting—from bright laboratories to dim warehouses—and its intuitive graphic user interface makes operation simple for users of all skill levels. Achieve four-decimal-place accuracy even in the field, thanks to true Peltier temperature control.

The J27 Portable Refractometer eliminates the need to double-check results back in the lab, saving time and ensuring trusted data on-site. From food and beverage to chemicals and pharmaceuticals, the J27 is preconfigured with over 20 measurement methods, including Brix, refractive index, and urine specific gravity. You can also customize methods to fit your unique application needs.

Powered by a rechargeable lithium-ion battery, the J27 fully charges in about two hours and provides 2 to 4 hours of operation, depending on usage. Each unit includes a charging station and two batteries, so you can keep one in use while the other charges.

The Rudolph J27 Refractometer delivers laboratory-grade accuracy wherever you need it—whether in the lab, the field, or on the production floor. Built for modern industries, it combines precision, portability, and durability in one powerful instrument.

Visit rudolphresearch.com today to learn more, request a demo, or place your order. The future of refractometry is in your hands—the Rudolph J27 Portable Refractometer: precision you can trust, wherever you need it.

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