Does anyone know what this duct detector is?

[Alex_Robbins]

Does anyone know the model of this duct detector? I couldn’t find any information on it on Google.

[TheCarson116]

Looks like a Simplex 2098-9648 duct detector to me: https://nriparts.com.imgeng.in/0fe4ee52-a8be-4910-a618-3ced6f7c00a7.jpg?imgeng=/w_1280/cmpr_30