8in Pyramidal Polyurethane Foam Anechoic Chamber Absorber Tile Composition: carbon and fire retardant chemical loaded polyurethane foamWorking Temperature: -85°F to 176°F (-50°C to +80°C)Environment: Indoor UseFire Retardancy: Certified Independent Lab Test Data to NRL 8093 Tests 1, 2 & 3Optional Test Data For UL94 and DIN 4102-B2Power Typical Power Handling: 1kW/m² Dimensions A B C D E/F Total Height Pyramid Base Pyramid Height Base Height Base Size # Pyramids 8in 203.2mm 2.67in 68mm 6.9in 175mm 1.57in 40mm 20x20in 49 per Absorber Reflectivities Reflectivity Normal frequency (GHz) 0.1 Ghz 0.2 Ghz 0.3 Ghz 0.5 Ghz 1 Ghz 3 Ghz 5 Ghz 10 Ghz 15 Ghz 40 Ghz Reflectivity (-dB) at normal incidence - - - 25 30 40 46 52 56 60 Frequently Asked Questions What frequency range does the 8in absorber cover? The 8in absorber provides effective absorption from 500 MHz (0.5 GHz), with -25 dB reflectivity at 500 MHz improving to -60 dB at 40 GHz. What are the dimensions of the 8in absorber tile? Each 8in tile has a 20x20 inch base with 8 inches total height (6.9 inch pyramids on a 1.57 inch base). Each tile contains 49 pyramids. Sold in 10-packs. How quickly does the 8in absorber ship? The 8in absorber is in stock and ships within 1-2 business days from our California warehouse. What are dB Absorber pyramidal absorbers made of? Our absorbers are made of carbon and fire retardant chemical loaded polyurethane foam, volumetrically loaded for consistent electromagnetic properties throughout the material. Are your absorbers fire rated? Yes, all our absorbers are certified to NRL 8093 Tests 1, 2 & 3 fire safety standards. Optional test data is available for UL94 and DIN 4102-B2 compliance. What is the operating temperature range? Our absorbers operate from -85°F to 176°F (-50°C to +80°C), suitable for standard indoor testing environments. .faq-section details { margin-bottom: 0.75em; border: 1px solid #e5e5e5; border-radius: 4px; padding: 0; } .faq-section summary { padding: 1em; cursor: pointer; font-weight: 600; list-style: none; } .faq-section summary::-webkit-details-marker { display: none; } .faq-section summary::before { content: "+"; margin-right: 0.75em; font-weight: bold; } .faq-section details[open] summary::before { content: "−"; } .faq-section details p { padding: 0 1em 1em 1em; margin: 0; color: #666; line-height: 1.6; }
