Click to expand Tap to zoom Apollo | SL-DA4R-P Duct Detector Photoelectric Analog Addr w/Relay SKU AP-F1D3-9511 Save Liquid error (snippets/product-badge line 32): Computation results in '-Infinity'% $224.99 | / Availability: Out of stock call for lead time 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart Data Sheet