Description
Product Overview
The Puyi DEF Refractometer is a precision optical instrument designed for measuring the concentration of AdBlue AUS32 diesel exhaust fluid. Constructed from durable aluminum alloy, this portable tool features automatic temperature compensation (ATC) for accurate readings between 10–30°C. Key specifications include product dimensions of 7.87 x 3.15 x 2.17 inches, weighing 8.47 ounces, with model number KR0015A. It operates on optical principles where light bending through liquid samples determines concentration levels, requiring no batteries for operation.

Usage
This refractometer is ideal for industrial laboratories, automotive service centers, and transportation maintenance facilities where regular monitoring of DEF quality is essential. Technicians and quality control personnel use it to ensure diesel exhaust fluid meets required concentration standards before vehicle application. The tool is particularly valuable for fleet maintenance operations, agricultural equipment servicing, and environmental compliance testing where accurate urea concentration measurements prevent engine damage and emissions system failures.
Why Choose Us
Puyi refractometers stand out through their combination of precision engineering and practical design. The automatic temperature compensation system ensures reliable readings across varying environmental conditions, while the aluminum alloy construction provides durability without excessive weight. Unlike electronic measuring devices, this optical instrument requires no power source, making it dependable in field applications. The included carrying case offers additional protection, and the straightforward three-step operation minimizes training requirements while delivering professional-grade results.
Key Features
- Automatic temperature compensation (10–30°C range) for accurate measurements
- Durable aluminum alloy construction ensures long-term reliability
- Portable design with carrying case for easy transport and storage
- Battery-free operation using optical measurement principles
- Simple three-step process for quick concentration testing
FAQ
How do I calibrate the DEF refractometer?
Calibration is performed by setting the instrument to zero using distilled water before taking measurements. Ensure the prism is clean and dry, then apply 2-3 drops of distilled water, close the light plate, and adjust the calibration screw until the scale reads zero.
What concentration range does this refractometer measure?
This instrument is specifically calibrated for diesel exhaust fluid (DEF) concentration measurement, typically covering the standard 32.5% urea concentration range used in automotive applications. The scale is optimized for AdBlue AUS32 specifications.
Is special training required to use this equipment?
No specialized training is necessary. The three-step operation process – calibrate, apply sample, read results – is straightforward. The included instructions provide clear guidance, and most users can become proficient after 2-3 measurements.
How does temperature compensation affect accuracy?
The automatic temperature compensation system adjusts readings based on ambient temperature variations between 10–30°C. This eliminates the need for manual temperature corrections and ensures consistent accuracy across different working environments.
What maintenance does the refractometer require?
Regular cleaning of the prism with a soft cloth and distilled water after each use maintains accuracy. Store in the provided case when not in use. The instrument requires no battery replacement or electrical maintenance due to its optical design.




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