Det-Tronics009862-001 Flame gas detectors
Det-TronicsSmokeWatch™ Explosion-Proof Smoke Detector It should operate with 24 VDC and be a type that provides either a relay output or a 4–20 mA output.
Det-TronicsDuct Watch Methane Gas Detector /monitor
Det-Tronics for Gas Detector Model PIRECL, Detronics
Det-Tronics