A radiation monitor arrived on Saipan in the Northern Marianas over the weekend.
A U.S. Environmental Protection Agency expert to set up the device was expected to be on island last night.
The administration in the Commonwealth of the Northern Mariana's is also asking the federal government to send more monitoring devices to the islands to better monitor not only the air for radiation but also incoming fresh seafood and other food products from Japan.
Increased surveillance is being taken only as precautionary measure following the radioactive leaks from Japan's quake damaged nuclear plants, not because of imminent danger.
Officials said on Saturday and Sunday that food in the CNMI is safe for consumption.