TSP9309 is an auto-darkening welding helmet produced by the “TOTAL” tools brand. Here’s a summary of its key features: Auto-Darkening Function: It automatically switches from a light state to a dark state when it detects an arc. The switching time is very fast, around 1/5000s. Protection: Provides UV/IR protection (DIN 16). Specifications: Viewing area: 90×35mm. Dark state: fixed shade 11. Light state: DIN 4. Arc sensor: 2. Power supply: Solar cells, with re-chargeable battery. Shade and Sensitivity: Shade control: unadjustable. Sensitivity control: unadjustable, auto. Availability: It is sold in varying locations, and online retailers. Key points to understand about this helmet, is that it is a fixed shade helmet, meaning the darkness of the lens when it darkens, is not able to be adjusted by the user.
