Cigarette smoke detection

Not sure what sub to post this in so if anyone has a better sub for this please let me know.

Someone in my household smokes in the house and I hate it! They stick to one room with the door closed when people are around but when they are on their own it's obvious they don't stick to this as the whole house stinks of cigarette smoke. They think I'm lying when I say I can smell cigarettes when I'm lying in bed.

So I'm looking for a device that can detect cigarette smoke but not an alarm. Just something that collects readings to show the level of cigarette smoke around the house?

Anyone have any suggestions? I'm just finding alarms when I Google it