<html> <body> At 07:16 PM 4/25/07, Marcel wrote: <blockquote type=cite class=cite cite="">Hello, I've not used this one but have heard good reports about it. The price is right Check their website at:  <a href="http://www.microdaq.com/lascar/el-usb-2.php" eudora="autourl"> http://www.microdaq.com/lascar/el-usb-2.php</a></blockquote> I have one (it's a Measurement Computing USB-502) and use it a fair amount, mostly in churches and the concert hall I look after, but I've left it in homes as well occasionally. Find it at:  <a href="http://www.measurementcomputing.com/cbicatalog/USB-502.asp?dept_id=414&pf_id=1759" eudora="autourl"> http://www.measurementcomputing.com/cbicatalog/USB-502.asp?dept_id=414&pf_id=1759 </a>It seems to work well, but it gives me dramatically different readings from those taken with my digital psychrometer, a Cooper SRH122. While the USB-502 can give me stored readings lately of  around 20% RH the Cooper has told me it's more like 10%-12%. One church with a C7 I look after read in the high teens on the USB, but the Cooper said it was 3.8% (+-4%) at the piano! The Cooper can be found at: <a href="http://www.tempsensor.net/modules.php?op=modload&name=News&file=article&sid=406" eudora="autourl"> http://www.tempsensor.net/modules.php?op=modload&name=News&file=article&sid=406 </a>A Dampp-Chaser with two tanks is being installed on that C7 next week. <x-tab>        </x-tab><x-tab>         </x-tab>John <x-sigsep></x-sigsep> <div align="center">------------------------------- John Musselwhite, RPT  -  Registered Piano Technician Musselwhite Piano Services - Calgary, Alberta Canada Office/cel (403) 246-7717 Fax (403) 255-5268 Outside of Calgary call Toll Free:  1-866-95-PIANO (1-866-957-4266) "Three Generations of Experience" </div> </body> </html>