Product review (2 stars): Not reliable
As another reviewer commented, this doesn't work with Windows 7.  I bought two of them originally, and of the two only one could be programmed.  The bad one was replaced.  I placed both in my test environment in November, with an hourly sample rate for a total of 2000 samples.  This took us through February 2.  One of the two downloaded its data, but the other refuses to communicate with my Windows 7 computer.  Two months of sampling for nothing.  Time to find another brand to try.

On the Extech website there is a software upgrade from late 2011, but this is only the PC software, not the software in the datalogger itself.  I downloaded and installed the upgrade, but the logger still will not download its data to the PC.

There is a similar product available from Dataq (EL-USB-1), which I am going to try.
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