GemRed Orthopedic Digital Goniometer Device

The GemRed Orthopedic Digital Goniometer is engineered for orthopedic surgeons, physical therapists, and rehab professionals demanding precision and reliability in joint angle assessment. Designed to meet clinical-grade standards, the device achieves ±1° accuracy and 0.1° resolution, with Bluetooth connectivity, memory recall, and ergonomic one-handed operation.

Clinical validation studies show that digital goniometers like HALO deliver superior inter- and intra-rater agreement compared to universal models, with mean differences typically under 2° across lower-limb joints.

In knee ROM testing, the HALO device demonstrated a minimum significant difference of 6°, outperforming long-arm goniometers (10°), smartphone apps (12°), and visual estimation (14°) in error margin and test-retest reliability.

Modern digital electrogoniometers (e.g. J-Tech, NK devices) consistently maintain error under 5° in thumb and wrist ROM, even for clinicians of varying experience levels. Meanwhile, studies comparing smartphone apps and manual tools show variability of 5–10° among inexperienced users; digital hardware removes much of this inconsistency.

Key Features:

• ±1° precision, 0.1° resolution—suitable for orthopedic diagnostics and surgical ROM tracking

• Bluetooth-enabled export for patient record systems

• Memory recall, ergonomic single-hand operation

• Minimal inter-/intra-rater variability with ICC > 0.90