supply of explosive gas detection and alarm system. , supply, fitment and successful proving of working of explosive gas detection and alarm system. one set of gas detection system, which consists of lel gas sensors (for explosive gases such as lpg/acetylene), smps, combine d hoor and flasher, 3 core x 1.5 sq. mm armoured cable etc. and other materials required for successful detection of ex plosive gases and one portable diffusion type multi-gas detector to detect explosive gases and oxygen level concentrati on and other toxic gases. specification as per annexure-i. [ warranty period: 30 months after the date of delivery ] ]