Laser Diagnostic Instruments AS | 500 followers on LinkedIn. Remote Oil Spill Detection & Spectral Fluorescence Signatures | Laser Diagnostic Instruments (LDI) manufactures autonomous non-contact sensors that detect oil on water and Spectral Fluorescence Signatures Analyzers to detect and analyze fingerprints of compounds . Highly accurate and easy to maintain, Remote Optical Watcher (ROW) finds oil spills early so you can respond before things get out of hand. Fluo-Imager, Spectral Fluorescence Signatures Analyzer, offers express detection and identification of organic compounds in liquid samples.