toys

[Ron Nossaman]

>I use the wet/dry bulb device, not having found an electronic I wanted to
>trust.  How accurate does this Whatman seem to be?  Can you suggest a
>source?
>
>thanks,
>
>sb


Dimensions in millimeters are 145l x 30t x 22w. 
Range 0°C - 50°C (32°F - 122°F),    2%-98%RH +/- 2%.
Cost was about $50 six years ago.

From:
Whatman Lab Sales 
5285 NE Elam Young Pkwy, Suite A400 
PO Box 1359 Hillsboro, OR  97224 
USA Phone : 503-648-0762 / Toll Free : 800-942-8626 / Fax : 503-648  

As to how accurate it actually is through what ranges, I don't know yet.
That's why I've been wishing I had a sling psychrometer for so long. Now I
can compare readings under different conditions and see how close the
digital really is. Meanwhile, for tuning, the absolute RH% isn't nearly as
important as the relative readings from tuning to tuning - if the error
remains "relatively" constant.

Ron N