SLV-E ( J )
Hochiki SLV-E ( J ) Photo-Electric Smoke Detector 24VDC (PACK OF 4 PCS)
You will find that the 6GK7343-1EX30-0XE0 model handles industrial communication with solid reliability.
Hochiki SLV-E ( J ) Photo-Electric Smoke Detector 24VDC 0.04A (PACK OF 2 PCS)
You will find that the Honeywell INNCOM E528 model works well in a busy hotel setting.