HERO TECH Auto-Darkening Welding Helmet WH4000
| Light State | DIN4 |
| Dark State | DIN9 - 13 (Stepless Adjustment) |
| Switching Time | <1/10,000s at Room Temperature |
| Delay Time | Fast/Slow 0.25S/0.70S |
| Sensitivity | Low/ High |
| Battery | Li-Mi & Solar Combination (Min. Lifetime : 5,000 Welding Hours) |
| Operation Temperature | -5°C (23°F) - +55°C (131°F) |
| Viewing Area | 92 x 42mm |
| Catridge Size | 110 x 90 x 9mm |
| UV Transmittance | 313nm ≤0.00006% 365nm ≤0.00006% |
| IR Transmittance | 780 ~ 1300 nm ≤0.003% 1300 ~ 2000nm ≤0.009% |
| Weight | 400g |
| Material | PP |
| Colour | Red |
| CE Approved No. | C1532.1 WWH |
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