The Honeywell Searchline Excel Open Path Infrared Gas Detector Transmitter & Receiver is a proven solution which aids in high-speed detection of flammable gases. The Searchline Excel short, medium or long-range line-of-sight gas detection system comes with approved certification for ATEX/IECEx, DNV, UL, FM/CSA, INMETRO & CU-TR Ex versions. If you need the transmitter, receiver, alignment kits or the handheld interrogator, we can supply.