max339

That's right. No housing at all.

Does anyone know where I can get good info on block cameras? I know that Sony makes some models, but who else makes them? What are they used for? I'm just doing some research and am not sure where to begin. Thanks for any info.

panasonic makes pressurized housings good for dusty environments like that. check those out.

xxxx xxxx

The fears that iris scanners are invasive or harmful, or even spread germs are all myths. I work for a major manufacturer of the iris scanners and the reality is that there is no harm at all. Some people think there are lasers that go into your eye. Totally not true. Also, you don't touch the equipment at all, not even with your forehead, so there is no contamination or germ spread. That's one of the advantages of it! It's completely safe. Now just to make people understand that!!