The Hobo U series dataloggers are great and they have a shuttle so you can download without moving the logger. They are easy to add more to, and are very easy to customize, etc. The initial set-up seems pricey, but then you are just adding in future. You can get the software, the shuttle, and several loggers for the cost of 2-3 hydrothermographs. 

My only complaint is that the software does not allow you to save defaults for how the charts look for printing (having to adjust the vertical axis to 0-100 and change the colors of the lines for it to really make sense). The data saving and naming the loggers and setting them up is super easy, the information is everything you can want. 



-----Original Message-----
>From: Mark Jensen <[log in to unmask]>
>Sent: May 30, 2008 11:07 AM
>To: [log in to unmask]
>Subject: datalogger advice requested
>
>All:
>
>I'm a newbie manager of an historic home with several outbuildings,  
>and need to purchase/set-up dataloggers in various buildings.
>
>I'm eyeing a product made by Davis Instruments, the "Extech 42270"  
>that is a small sensor that can be moved to a docking station to  
>download the data to a computer. The docking station can be used with  
>multiple sensors. The price seems good, and I'm wondering if any of  
>you have experience with this product or this company that might help  
>me feel good (or bad?) about this decision. Here's a link:
>
>http://www.davis.com/catalog/product_view.asp?sku=2684290&pfx=DO&dsku=EH42275
>
>Of course, general datalogger-selection advice and/or product  
>recommendations are very appreciated.
>
>Thanks,
>
>Mark Jensen
>Dangberg Home Ranch Historic Park
>Minden, NV
>
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