The PMD-1024LS Personal Measurement Device provides 24 bits of digital I/O plus a 32-bit counter. The compact (70.4 by 81.1 by 12.7 mm) unit draws power from the USB connection. Interfaces for Excel, Windows, and Linux are available. The PMD-1024LS is priced at $99.
Measurement Computing Corp.www.measurementcomputing.com