Fully Portable Refractometer with Unmatched Capabilities
Rudolph brings decades of leadership with High Accuracy, Bench top Refractometers to Portable Refractometer Instrumentation
With the experience and innovation gained from over 2 decades of leadership in Refractometer design and manufacturing, Rudolph introduces the new benchmark for Portable Refractometers. The J27 Refractometer is entirely untethered yet refuses to accept the compromises in performance and accuracy of typical Handheld instruments. Now measure everything anywhere still with laboratory level accuracy
Temperature Controlled Measurements at 20 and 25°C from a Handheld Refractometer
The weakness of most portable refractometers is they do not control temperature. Refractometer measurements are often highly sensitive to drifting results because mathematically correcting for temperature alone does not work well when the ambient temperature is changing. Only precise temperature control will result in the measurement accuracy many users require.
The Rudolph Portable Refractometer J27 Peltier Temperature Control at the prism surface allows for improved accuracy and greater stability. Precise heating and cooling ensures stable and accurate measurements at either 20 or 25°C. Select the J27 series with temperature control for precise measurements when working with samples that are very hot, very cold or are not Sucrose, Glucose or sugar based.
For example, a glycol sample must be measured with precise temperature control for an accurate measurement – temperature correction for sugar cannot be applied to non-sucrose based samples. A sample coming from a hot kettle on a production line must also be temperature controlled as temperature correction will not be accurate for a sample far from room temperature.
High Durability Industrial Sapphire Prism
Synthetic sapphire prisms have similar hardness to diamond and can be cleaned with a paper towel. This makes sample cleaning fast and easy.
Regardless of an portable refractometer’s specified accuracy, a refractometer’s real-world performance depends on how well the instrument is cleaned between samples.
User friendly GUI and Bright LED, Touch Screen Display
Extremely easy to use Graphic User Interface (GUI) and the availability of 10 different Languages on a brightly lit 7 inch (178mm) touch screen makes this the most user friendly portable refractometer on the market today.
The interface is a bright, LED touchscreen, with an easy to navigate GUI. No more difficulties reading measurements in very bright or dark environments in the warehouse or field. Benchtop Features in handheld refractometer
Portable Refractometer with Handheld Flexibility
The J27 handheld refractometer is powered by a Lithium-Ion battery that is easily recharged, your J27 is ready to go everywhere you need to make measurements. This might be at the loading dock when receiving incoming raw goods or out on a distillery floor. The Lithium Ion battery can be charged in
approximately 2 hours providing up to 4 hours of
constant measurements under heavy usage or 8 hours of normal usage. Included is a Charging Station for convenient stationary charging.
Portable Refractometer Laboratory Accuracy – Everywhere You Need to Measure
Most refractometers only provide for 2 or 3 decimal place accuracy and results are prone to drift. By combining laboratory level measurement module design, and true Peltier Temperature Control, Rudolph provides accuracy to the 4th decimal place. Laboratory accuracy in the field eliminates rechecking of materials in the Lab allowing users to test right in the field, on the receiving dock, or in a formulations area. Materials are measured for a reason, so why settle for just 2 or 3 decimal place accuracy when you can have steady and reliable 4 decimal place accuracy?
Flexible Method Management
Factory installed measurement methods and scales cover a wide group of industries and applications. The J27 portable refractometer is factory configured with over 20 Methods and Concentration Scales which include RI, Brix, Urine SG, and more. Users can create measurement methods and store any scale they wish.
Food and Beverage Applications
•Seed Oils
•Edible Oils
•Candy
•Syrups
•Soups
•Milk
•Teas
•Juices
•HFCS
•Soft Drinks
•Sauces
•Confections
•Jellies
•Fruit products
•Soybean Oil
•Sodas
•Jams
•Starch
•Coffee Extracts
•Juice concentrates
•Vegetable Products
Market Specific Scales Available
- Urine Specific Gravity
- Fuel System Icing Inhibitor
- Ethylene Glycol / Coolant
- Alcohol
- Nitric Acid
- Coffee
- UAN Fertilizer
- Ethanol
- Formaldehyde
- Glycerol
- Methanol
- Potassium Chloride
- H2O2
- Propylene Glycol
- Propanol
- Baume
- Calcium Chloride
- Urea
- Sodium Chloride
J27 Refractometer Data Capacity Validation
Validated for High-Volume Measurement Data
The J27 Refractometer is designed to support busy laboratories, production teams, and quality control environments that generate large volumes of measurement data. To confirm reliable performance in demanding operating conditions, the J27 has been validated with a 50,000-record measurement dataset across core data-management functions.
Testing confirmed dependable operation across measurement storage, record retrieval, filtering, exporting, printing, and report generation. For customers who need confidence in long-term data handling, the J27 provides a practical, validated solution for managing high-volume measurement workflows.
Why Data Capacity Matters
In regulated and high-throughput environments, measurement data must remain accessible, organized, and reliable. As testing volume increases, users need an instrument that can do more than simply capture results. They need a system that supports efficient review, export, reporting, and record retention.
The J27 Refractometer helps teams maintain confidence in their data by supporting high-volume record management while preserving data completeness and output integrity.
Validated J27 Data-Management Capabilities
The J27 Refractometer was validated using 50,000 measurement records. Key data-management functions were tested and confirmed to operate successfully, including:
- Measurement record storage
- Historical data retrieval
- Record filtering
- Data export
- Print output
- Report generation
This validation gives customers confidence that the J27 can support demanding workflows where large numbers of measurements are created, reviewed, and archived over time.
Built for Demanding Quality and Production Workflows
The J27 is well suited for teams that rely on frequent refractometer testing as part of daily quality checks, production monitoring, incoming material inspection, formulation review, or laboratory analysis.
By validating performance with a large measurement dataset, the J27 demonstrates its ability to support environments where data volume grows quickly and where historical measurement access remains important.
Reliable Export and Archiving Support
For high-volume users, routine data export and archiving are important parts of good data-management practice. The J27 supports practical export workflows through WiFi Share and USB options, helping users transfer records for external storage, documentation, and audit support.
These export options make it easier for teams to keep measurement records organized while supporting internal quality systems and long-term record retention practices.
FAQ’s
How many measurement records has the J27 Refractometer been validated with?
The J27 Refractometer has been validated with a 50,000-record measurement dataset across key data-management functions.
What data-management functions were validated?
Validation testing included measurement storage, historical data retrieval, filtering, export, print output, and report generation.
Does the J27 support exporting measurement records?
Yes. The J27 supports practical export workflows through WiFi Share and USB options, helping users transfer records for external storage, documentation, and archiving.
Why is data capacity important for a refractometer?
High-volume laboratories and production teams often generate thousands of measurement results over time. Validated data capacity helps ensure users can continue to access, manage, export, and report on historical measurement data efficiently.
Who benefits from high-volume refractometer data handling?
Quality control teams, production facilities, laboratories, and regulated environments benefit from reliable access to measurement history, export tools, and organized record-retention workflows.
Learn More
Contact Rudolph Research Analytical to learn how the J27 Refractometer can support your quality-control, production, and laboratory data-management needs.
Technical Specifications J27 Portable Refractometer
| 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 or 25 °C |
| Measurement Scales | Refractive Index (nD), Brix (% Sucrose)(% RDS) |
| % Concentration Scales | Unlimited |
| Ambient Temperature Limit | 10 to 35°C |
| Sample Dish | Easy Clean, Small Volume, Sample Dish |
| EP Cover | Standard |
| Prism | Synthetic Sapphire |
| Operating System | Android OS |
| Measurement Time | User Configurable – can be less than 5 seconds |
| Display | Bright, Backlit – 7” touch screen. Standard 10 different Language options |
| Communication Interfaces | USB-C, WiFi, Manual Entry, RFID, and Barcode Reader for entering sample IDs |
| Printing | Wireless |
| Remote Support | Troubleshooting, Diagnostics Tools, Software and Updates available via the Internet |
| Internal Memory | Up to 6,000 Measurements |
| Operating Dimensions | 7.28” (L) x 4.83” (W) x 13.59” (H) 18.49 cm (L) x 12.27 cm (W) x 34.52 cm (H) |
| Shipping Dimensions | 18” (L) x 18” (W) x 12” (H) |
| Operating Weight | 3 lbs 6oz |
| Charging /Power Consumption | 6 – 8 hours battery life on a full charge |
| Country of Manufacture and Design / Warranty | 1 Year Domestic and international warranty |
