Click to expand Tap to zoom Siemens (Pyro) | FDO421 Detector Optical Smoke SKU PR-F1D2-9166 Save Liquid error (snippets/product-badge line 32): Computation results in '-Infinity'% $86.99 | / Availability: Only 13 left! 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart