Hello.  I have recently become aware of the relatively inexpensive option of
purchasing RH and temp. sensors (known as data loggers) that record
environmental data continuously and store it internally in a microchip (ex,
ONSET brand).  This data is downloaded into a computer at a later time in
order for it to be read.  The sensors are tiny, and very affordable compared
to the recording hygrothermographs that are larger and use graph paper.

I believe the data loggers were originally designed for biological studies,
field use, and the like.  I was wondering if anyone has experience with these
loggers in museums.  If so,  are they worthwhile for museum
applications?  How do they compare with the "standard" recording
hygrothermographs I/we are more familiar with?  How is the accuracy of these
small units?  We are considering them as a cost effective option for a small
museum.  Any comments are greatly appreciated!

Thank you,

Rebecca Patchett
Lilah C. Holden Elephant Museum
Portland, OR
e-mail:  [log in to unmask]