The t200 has an emissivity table. It does not have a dew point alarm.
Send me a private on the cost, if you would like my opinion as to the value of a used T200.
The good thing about a T200 is that you can have it upgraded to a 240x320 detector - which turns it into a T360 w/ the exception that it will still have a 9hz refresh rate instead of a 30hz refresh.
V/R
Mark