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Subject: Dataloggers


From: Scott Ellis <scott_ellis<-a>
Date: Friday, October 21, 2005
Howard B. Wellman <wellman [at] dhcd__state__md__us> writes

>Can anyone recommend a sensor and/or data logger that will record
>visible and UV light levels in museum exhibits and historic house

Scott here from Onset Computer, we make the HOBOs. As most know
unfortunately we do not offer a UV sensor, just a general light
level sensor/logger that outputs in footcandles.

I have 2 immediate suggestions/recommendations. One is to take a
look at our competitor ACR in Canada as Will Jeffers described. I
believe its the Conservation logger found at
<URL:> may meet
your needs.

The second is to use an existing UV light sensor which has an analog
output. You'll need to check the manufacturer's specs to see if
there is or what the output is. The standard HOBOs, H8s or U12s
which have built in temperature and RH sensors also have an external
input. The models are the H08-004-02 or U12-012. The external input
can accept a 0 to 2.5 Volt or 4 to 20 mA input. The U12s can scale
the analog output from raw reading back into UV measurements.

Its not the typical plug and play solution that we offer however it
may be an opportunity to use your existing HOBOs.

Also, if anyone is in Boston for the Museum Expo in May, please stop
by and say hi and check out so of our new products (sorry, nothing
to solve the UV problem).

Scott Ellis
Senior Product Application Specialist
Onset Computer Corporation
Toll Free: 800-564-4377 x3153
Fax: 508-759-9100

                  Conservation DistList Instance 19:23
                 Distributed: Friday, October 28, 2005
                       Message Id: cdl-19-23-008
Received on Friday, 21 October, 2005

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