They only tell you've found a sat, not identify. The only meters that will correctly identify satellites are the Birdog and the Superbuddy. These have their limitations as well though.
The Birdog cannot identify the 110, nor can it accept signals from the ka sats. Of the sats directv offers, it can identify the 72.5, 95, 101, and 119.
I'm not entirely certain as I haven't used one but I believe the Superbuddy has similar limitations.
Now, both of them can be used to identify a lot of other satellites as well, but unless you're doing other types of satellite installations I would assume Directv's sats to be the only ones of interest here.
The Birdog cannot identify the 110, nor can it accept signals from the ka sats. Of the sats directv offers, it can identify the 72.5, 95, 101, and 119.
I'm not entirely certain as I haven't used one but I believe the Superbuddy has similar limitations.
Now, both of them can be used to identify a lot of other satellites as well, but unless you're doing other types of satellite installations I would assume Directv's sats to be the only ones of interest here.