I personally postponed the purchase, so I have not yet hands on experience.
But I happen to be about to (tomorrow, actually!) buy an AKCP Sensor Probe 8 (
http://www.akcp.com/products/sensorprobe-series/sensorprobe8/) .
In fact, I found out that a friend I trust, working in another organization, is using them since years ago, and they seem to just work.
Those products look comparable in scope to the two IT Watchdogs units we have and perhaps even a bit more "industrial" and maybe better fit and finish.
They also have a chainable sensor probe for temp inputs so I am guessing that makes fewer ports go farther.
One thing we got for our primary Watchdog is a combined temp/humidity/airflow sensor for the discharge of our main AC unit. That's nice. One feature I don't see in the AKCP line is a light sensor. Our Watchdog has one built in and we've found that a much more reliable sensor for room entry than a simple contact closure. We like that a lot. Lights turn on. Phone rings.