This enclosure is built to accommodate either a VESDA-E VEU, VESDA-E VEP, VESDA-E VES or VESDA VLF detector. The enclosure has a hinged door for easy access for installation and maintenance which includes a glass window to view the onboard display. It includes predrilled holes for inlet and exhaust ports and cable entries so that installation of a detector is a simple process requiring minimum tools. Moreover the enclosure is supplied with pipe fitting to ensure that the IP66 integrity of the enclosure is maintained.