"The PVmet™- 200US ultra sonic commercial model features all the same high quality sensors as our best selling PVmet™-200, upgraded with a precision Ultra Sonic anemometer. The Ultra Sonic anemometer offers a superior quality sensor with no moving parts greatly increasing it's durability and practically eliminating maintenance. As with every model in the PVmet™ line of weather stations, this high performing station is economical, durable, compact, simple to install, and easy to deploy."