Portable Clinical Refractometer

PTRP100-C is a portable digital clinical refractometer developed for rapid measurement of Urine Specific Gravity (USG) and Serum Protein (SP). It uses the same optical and hardware platform as PTRP100, with dedicated clinical software providing application-specific measurement scales and results.

The instrument uses Total Internal Reflection and critical-angle detection with a 589 nm LED, Sapphire prism and 2500-pixel linear CCD. Refractive-index information is processed internally and converted into the clinical parameters displayed to the user.

Urine Specific Gravity is measured across a range from 1.0000 to 1.0600 with an accuracy of ±0.0004 and resolution of 0.0004. Serum Protein is displayed from 0.0 to 12.0 g/dL with ±0.1 g/dL accuracy and 0.1 g/dL resolution.

Each measurement is completed in less than five seconds and requires only approximately 0.4 mL of sample. Automatic temperature compensation operates from 5 to 80 °C, while samples up to 80 °C can be accepted by the instrument.

The sample well and sample-contact components are manufactured from Stainless Steel 316L. A 99.997% Al₂O₃ Sapphire prism and PTFE sealing form the optical sample interface.

PTRP100-C is powered by a rechargeable 4000 mAh Li-ion battery and uses USB Type-C for charging and data transfer. Up to 6,000 measurement results can be stored internally and exported in CSV format for laboratory record keeping and further analysis.

A 2.42-inch OLED display and local keypad provide direct portable operation. PTRP100-C is intended as a refractometric measurement instrument for clinical and laboratory workflows requiring rapid USG and Serum Protein results.