There's nothing special about the probes for the DM meters. Use any probes that you want.
It's really not that great a dmm, but it is integrated nicely with the delay sweep measurment. Other than verifying that it works, I've never used the DM40 on my 465 to measure anything other than delay time. I do like the look of those scopes though.
If you're talking about the temperature probe, you'll have to check the Tek documentation to see if it says anything. My manual says it's only good for +/-2 C.