The Sellstrom SUW-S27740 Premium Series auto-darkening filter pairs Blue Lens Technology with an extra-large viewing area and internally controlled shade settings. Designed for product S26400, it provides shade 4 in the light state and variable dark-state ranges of 5–9 and 9–13. Four sensors, adjustable sensitivity and a memory function support filter operation, while a grinding function, grinding warning and low-battery indicator provide additional operating features.

• Filter dimensions: 133.34 mm × 114.30 mm; imperial dimensions: 5-1/4" × 4-1/2".
• Viewing area: 83.31 mm × 100.07 mm; imperial dimensions: 3.28" × 3.94". Optical clarity rating: 1/1/1/2.
• Switching time of 0.08 ms, with an adjustable dark-to-light delay from 0.1 s to 0.9 s.
• Automatic power control with a solar/lithium power supply and low-battery indication.
• Internal shade control, adjustable sensitivity, memory function and four sensors; grinding mode includes a warning.
• Certifications: CE, CSA and ANSI. Warranty: 2 years.