Table 1.
Specification of the watch-type sweat rate sensors.
| Specification | Measured performance | |
|---|---|---|
| Sweat rate detection | Range | 3.67~137.68 g/m2h |
| Sensitivity | 0.0039 (pF/s)/(g/m2h) | |
| Linearity | 97.9% | |
| Measurement period | 2 min | |
| Humidity chamber movement | 0.86 ( ± 0.13) mm | |
| Input voltage | 6 V | |
| Average consuming power per measurement period (2 min) | 0.4 W | |
| Size | Overall diameter × total thickness: (35 ± 0.5) mm × (25 ± 0.5) mm (including batteries*) | |
| Weight | 30 ( ± 1.0) g (including two batteries*) | |
| Wind-resistant range | ~1.5 m/s (human walking speed**) | |
*CR2032, lithium coin, 3 V, 240mAh.
**A. Pepin, et al. Spinal Cord (2003).