Reading Aesthetic Device Parameters: The Numbers Game in Procurement
Five Core Parameters, Real Meanings
| Parameter | Physics | Inflation trick | Verification |
|---|---|---|---|
| Power (W) | Energy per time (sustained diode output) | Peak quoted as sustained | Measure output after 30 min continuous |
| Fluence (J/cm²) | Energy per area | Max on smallest spot, cooling off | Demand a spot-fluence matrix |
| Pulse width (ms) | Pulse duration | Wide range, coarse steps | Check minimum step size |
| Frequency (Hz) | Shots per second | Peak rate with collapsing energy | Measure decay at high rate |
| Cooling temp | Contact-surface temperature | No-load temp quoted | Skin-surface reading during treatment |
Three Signals of Systemic Inflation
- No test conditions: any number without “at X spot / X cooling / after X minutes” is suspect.
- Refuses third-party testing: suppliers who reject energy-meter verification are out.
- Demo unit ≠ shipping unit: lock serial numbers and acceptance conditions in contract.
Acceptance Test Template
- Energy-meter measurement across all settings.
- Stability: 30-60 minute power-drift curve.
- Cooling: skin-simulant temperature log.
- Safety: alarms, interlocks, emergency stop.
LEIJEX ships calibration reports with every unit and welcomes on-site acceptance testing — specifications on each product page.
FAQ
Are higher numbers better?
No. Usability, stability and granularity beat extremes; high-spec-unstable is unusable and dangerous.
Why do similar devices differ so much?
Different measurement conditions and honesty. One shared test template across suppliers is the only reliable comparison.