ESL/Sentrol (now Interlogix)

ESL and Sentrol are legacy security-product brands associated with Interlogix. ESL was known for fire and life-safety detection, while Sentrol was known for intrusion sensors. Interlogix’s broader historical portfolio included security and detection equipment. Carrier announced in 2019 that it would exit the residential and commercial security business and discontinue Interlogix product lines, so buyers should verify current product availability and support before procurement.