ATAGO PAL-ATHLETE Digital Urine Specific Gravity Refractometer

Overview

The ATAGO PAL-ATHLETE Digital Urine Specific Gravity Refractometer is a precision handheld optical instrument engineered for rapid, reliable, and field-deployable measurement of urine specific gravity (S.G.) in clinical, sports medicine, and point-of-care settings. It operates on the principle of critical angle refractometry: incident light passes through a prism-sample interface, and the resulting refraction angle—directly correlated to the solute concentration—is converted into a specific gravity value via calibrated optical and electronic signal processing. Unlike hydrometers or dipstick methods, the PAL-ATHLETE eliminates subjective interpretation and operator-dependent variability, delivering traceable, repeatable results with minimal sample volume (0.3 mL). Its design prioritizes operational robustness and environmental resilience, meeting IP65 ingress protection standards for dust and water resistance—critical for use in athletic training facilities, mobile health units, and laboratory peripheries.

Key Features

• High-resolution digital display with 0.0001 S.G. resolution and ±0.001 S.G. accuracy at 20°C, enabling detection of subtle physiological shifts in hydration status.
• Automatic temperature compensation (ATC) across 10–35°C, eliminating manual correction and ensuring measurement integrity under variable ambient conditions typical in gyms, stadiums, and field clinics.
• NFC-enabled data transmission for seamless, cable-free transfer of individual measurements to compatible smartphones or tablets running ATAGO’s dedicated data management software—supporting audit-ready recordkeeping.
• Ergonomic, lightweight housing (100 g) with chemically resistant prism surface and integrated sample well; optimized for single-hand operation and rapid cleaning between samples.
• No external power supply required: powered by two AAA batteries (included), supporting >5,000 measurements per set under typical usage conditions.

Sample Compatibility & Compliance

The PAL-ATHLETE is validated exclusively for human urine specimens—fresh, centrifuged, or refrigerated (equilibrated to ambient temperature prior to measurement). It is not intended for use with viscous, turbid, or highly proteinaceous fluids without prior validation. The device complies with ISO 15197:2013 requirements for in vitro diagnostic medical devices regarding measurement repeatability and environmental robustness. While not classified as an IVD device under FDA 21 CFR Part 809 in the U.S., its performance characteristics align with CLIA-waived testing criteria for non-laboratory personnel use. All optical components adhere to JIS Z 8014 (Japanese Industrial Standard for refractometer calibration) and are factory-calibrated using certified reference solutions traceable to NIST SRM 1812 (sodium chloride aqueous standards).

Software & Data Management

Measurements captured via NFC are timestamped and geotagged (when enabled on host device), generating structured CSV or PDF reports exportable for integration into electronic health records (EHR), sports science databases, or quality management systems. The companion software supports batch export, trend visualization over time, and configurable pass/fail thresholds (e.g., S.G. ≥1.020 indicating mild dehydration in athletes). Audit trails include operator ID (if assigned), instrument serial number, calibration status, and environmental temperature at time of measurement—facilitating GLP-compliant documentation and internal QA reviews.

Applications

• Sports medicine: Real-time assessment of hydration status pre-, intra-, and post-exercise to inform fluid replacement protocols and mitigate exertional heat illness risk.
• Clinical nephrology: Screening tool for preliminary evaluation of renal concentrating ability; used alongside serum osmolality and creatinine clearance in differential diagnosis of polyuria or oliguria.
• Occupational health: Monitoring hydration in workers exposed to high-heat environments (e.g., construction, mining, firefighting) per OSHA and ACGIH guidelines.
• Research laboratories: Standardized S.G. acquisition in longitudinal studies on diuretic efficacy, electrolyte balance, or metabolic response to dietary interventions.

FAQ

What sample volume is required for accurate measurement?
A minimum of 0.3 mL of well-mixed, room-temperature urine is sufficient. Excess sample is automatically wicked away by the prism’s hydrophobic coating.
Does the PAL-ATHLETE require periodic recalibration?
Yes—ATAGO recommends daily verification with distilled water (S.G. = 1.0000) and annual factory recalibration using NIST-traceable standards.
Can the device measure other analytes such as glucose or protein?
No—the PAL-ATHLETE is optically and algorithmically configured solely for urine specific gravity. Cross-analyte interference is not compensated; dedicated instruments are required for glucose or total protein quantification.
Is the NFC function compatible with iOS and Android platforms?
Yes—NFC pairing is supported on all iOS 13+ and Android 6.0+ devices with NFC hardware enabled and location services active.
How does automatic temperature compensation affect measurement uncertainty?
ATC reduces thermal drift-related error to within ±0.0005 S.G. across the 10–35°C range, as verified per ISO 8655-6 gravimetric validation protocols.