J27 – Handheld Refractometer

The J27 from Rudolph Research Analytical is a fully portable, temperature-controlled handheld refractometer designed to deliver lab-grade accuracy in any environment. Combining Peltier-controlled measurement, industrial sapphire prism, and a bright 7-inch touchscreen, the J27 sets new standards for field refractometry.

Rudolph Research Analytical - Handheld refractometer - J27

Key Features

Laboratory accuracy to the 4th decimal place
Peltier temperature control at 20°C and 25°C
7” touchscreen with intuitive GUI and 10 languages
Synthetic sapphire prism for durability and easy cleaning
Measurement time < 5 seconds (configurable)
Rechargeable lithium-ion battery: 4–8 hours runtime
Easy clean, low volume sample dish
Factory preloaded and customizable measurement methods

Applications

Brix, RI and custom % concentration measurements
Beverage industry: juice, tea, coffee, alcohol
Automotive and coolants: glycol, urea, DEF, fuels
Pharmaceuticals: alcohols, formaldehyde, acids
Veterinary and urine SG analysis
UAN fertilizers, emulsions, oils, surfactants, and more

Technical Specifications

Measurement Range: RI 1.3–1.7 | Brix 0–100%
Accuracy: RI ±0.0001 | Brix ±0.05%
Repeatability: RI ±0.0001 | Brix ±0.05%
Resolution: RI 0.0001 | Brix 0.01%
Temperature control: 20°C and 25°C via Peltier
Ambient Temp: 0°C to 35°C
OS: Android-based
Display: 7” LED touchscreen
Data Storage: up to 3,000 results
Interfaces: USB-C, Wi-Fi, Bluetooth, RFID, Barcode
Dimensions: 18.49 × 12.27 × 34.52 cm | 1.6 kg approx.

Ideal For

Users who need laboratory-grade refractive index or Brix measurements on the go – in production, QC labs, warehouses, or remote locations. Ideal for beverage, automotive, chemical, and agricultural applications.

Contact Us

Have a question or interested in a product? Feel free to reach out via the form, send us an email, or call us at +41 44 986 29 29 during business hours.

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