LEL1-1REC4-28434-5701 is a Sensata LEL (Lower Explosive Limit) sensing/control module. It is a flame detection and alarm system that provides early warning of potential gas/vapor gas hazard levels, as well as monitoring and controlling gas/vapor levels in commercial, industrial, and residential applications. The module consists of a base module and three optional sensors which can be used together or individually, allowing for easy customization based on the user's specific needs and/or environmental conditions. The system can be interfaced with a variety of digital and analog sensors including flame, smoke, toxic and combustible gas, infrared, carbon monoxide, and combustible dust detectors. It features a 4-20 mA current loop output for connection to fire control systems and an optional battery backup for 24 hour protection. It is certified for SIL2 & SIL3 safety levels, and is FM approved for use in hazardous areas.