The ESL that’s rebranded as Simplex was also made as a 120VAC model - the 706 series. It came in a wired-in (706-2) and a line-cord version (706-1). I have the wired-in version in my collection, it was in my aunt’s house.
Photo Storage 
Here’s the alarm.
Photo Storage 
Removing the side ring (below) reveals this test switch and the filters for the photo chamber.
Photo Storage 
Detector, front cover and side ring.
Photo Storage 
Main unit. Notice the area that would accommodate the heat sensor.
Photo Storage 
Here’s the label on the back of the front cover.
ESL also made the 331, which is the battery powered version of the 320 series. I had seen the listing for the 331 in an older Eveready battery catalog and inquired about it on ESL’s site. Not sure if it was a standaloe model or a wireless one like the 353.
ESL also made the 206 which was also rebranded by Gillette, and there was a Gillette version of the above 706.