Accelerometer
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| Brand | ActiGraph |
|---|---|
| Origin | USA |
| Model | LEAP |
| Accelerometer Type | Triaxial MEMS |
| IMU | Integrated 6-DOF (3-axis accelerometer + 3-axis gyroscope) |
| Sampling Rate | 32–256 Hz |
| Primary Accelerometer Range | ±8 g |
| Secondary IMU Accelerometer Ranges | ±2 g / ±16 g |
| Gyroscope Range | ±2000 dps |
| PPG Wavelengths | 530 nm (green), 655 nm (red), 940 nm (IR) |
| Barometer Range | 300–1100 hPa |
| Skin Temperature Range | −20 °C to +50 °C |
| Microphone Bandwidth | 100 Hz–10 kHz |
| Battery Life | 32 days |
| Onboard Storage | 1 GB (79 days at default sampling) |
| Dimensions | 3.85 × 3.9 × 1.225 cm |
| Weight | 24 g |
| Water Resistance | IPX7 (1 m, 30 min) |
| Connectivity | USB-C, Bluetooth® Low Energy 5.0 |
| Wear Position | Wrist, waist, ankle, or chest |
| Brand | ActiGraph |
|---|---|
| Origin | USA |
| Model | wGT3X-BT |
| Acceleration Range | ±8 g |
| Dimensions | 4.6 × 3.3 × 1.5 cm |
| Weight | 19 g |
| Memory Capacity | 2 GB (up to 120 days at 30 Hz) |
| Battery Life | Up to 25 days (fully charged) |
| Interface | USB 2.0 & Bluetooth® Smart |
| Sampling Rate | 30–100 Hz |
| Calibration | Factory-calibrated, no user calibration required |
| Water Resistance | IP27 (submersion up to 1 m for 30 min) |
| Measured Parameters | Raw triaxial acceleration (x/y/z), steps, activity intensity (METs), energy expenditure (kcal), heart rate (with compatible chest strap), ambient light level, total sleep time, sleep efficiency, sleep onset latency, wake after sleep onset (WASO), periodic limb movements (PLM) |
| Brand | TML (Tokyo Measuring Instruments Laboratory) |
|---|---|
| Origin | Japan |
| Model Range | ARF-A, ARF-A-T, ARH-A, ARJ-A, ARJ-A-D, ARJ-A-T, ARE-A, ARE-A-T, ARS-A, ARM-A-T, ARK-A |
| Measurement Principle | Piezoresistive Sensing |
| Axis Configuration | Single-, Dual-, and Triaxial Options |
| Environmental Rating | IP68 (ARH-A), General Purpose (ARF/ARJ/ARE), High-Frequency Optimized (ARK-A) |
| Sensitivity Range | 0.1–100 mV/g |
| Full-Scale Acceleration Range | 10–10,000 m/s² |
| Operating Temperature | –20 °C to +85 °C |
| Output | DC-coupled voltage (±5 V or 0–10 V), IEPE-compatible variants available |
| Mounting | Stud, adhesive, or embedded (concrete-compatible for ARH-A) |