18in Pyramidal Polyurethane Foam Anechoic Chamber Absorber Tile Composition: carbon and fire retardant chemical loaded polyurethane foam Working Temperature: -85°F to 176°F (-50°C to +80°C) Environment: Indoor Use Fire Retardancy: Certified Independent Lab Test Data to NRL 8093 Tests 1, 2 & 3 Optional Test Data For UL94 and DIN 4102-B2 Power Typical Power Handling: 1kW/m² *Special Order: 8-10 Weeks Dimensions A B C D E/F Total Height Pyramid Base Pyramid Height Base Height Base Size #Pyramids 18in/457.2mm standard standard standard 24x24in/ 610x610mm 16 per Absorber 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 - - 20 28 35 45 50 60 60 60 Frequently Asked Questions What frequency range does the 18in absorber cover? The 18in absorber provides effective absorption from 200 MHz, extending coverage into lower VHF frequencies with excellent broadband performance. Is the 18in absorber in stock? The 18in absorber is a special order item. Contact us for lead times and availability. 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; }
