Urine Detection Device

I saw this sign in a lift yesterday. OMG! What the heck is a urine detection device? So if you piss in the lift, out comes a camera and snaps your picture. That's my first guess. And the best part was, it was found in a lift that was over 20 years old.

But firstly, how do you detect urine or when someone is pissing. Detection by smell? hmmmm. I don't think that the machine is that advanced yet. Moreover in a 20 year old lift. Or maybe if it detects water on the floor. Don't think so. If someone is washing the floor or on a rainy day, then the camera would snap like mad.

I actually looked and investigated thoroughly the internal of the lift. Not a single camera to be found. It could have been a hidden, hidden camera. One that is so hidden, you cannot see it. But once urine is detected, it jumps out and snaps your picture.

To be honest, instead of using such a high-tech device, a small camera in the lift would be more than sufficient and it would deter crimes from happening in the lifts as well. If you really need a urine detection device, I think the most efficient one would be to hire a person and hide him in a compartment in the lift. When he smells or hears someone pissing, then he sticks his head out and snaps the picture. Definitely more efficient and cheaper.