The PME logger is designed to interface with PME’s temperature chain as part of the T-Chain U/W Logger System. The logger and chain are completely submersible and the 'birdcage' is designed to connect to a customer-supplied buoy and cable system. The logger must be brought to the surface to refresh the batteries and obtain measurements.

The logger's capacity and endurance depend upon the number of nodes on the chain, the sampling interval, and the capacity of the compact flash card. With a 128 Meg flash and sampling 41 nodes each minute the logger capacity is approximately 1 year.

The heart of the logger is a Persistor CF2 single board computer. PME supplies source code for PME's simple logging program. Customers can adapt this source code for their own purposes. Adaptation is relatively easy, but requires the purchase of inexpensive 3rd party software.