Provided it's not in a very dynamic temperature enviroment, a clip on heat sink should provide a thermal sink large enough to keep self heating from being much of an issue, while remaining close to ambient temp.
Watch for solar heating, though, if your temp sensor is ever in direct sunlight. Some people build their own shields.. Here's an article talking about the effects: http://hortsci.ashspublications.org/content/42/6/1372.full.pdf [In a message on Tue, 20 Mar 2012 13:23:43 EDT, "Paul Alfille" wrote:] >--===============8949809253152688374== >Content-Type: multipart/alternative; boundary=0016e6d45a1d48583404bbaff26b > >--0016e6d45a1d48583404bbaff26b >Content-Type: text/plain; charset=ISO-8859-1 > >I put one in a plastic drinking straw with silicone sealant at the ends. It >adds a little thermal lag, but self-heating shouldn't be a problem for >relatively infrequent readings. > >(You can experiment -- see if a sequence of measurements at fixed interval >increases, then lengthen the time gap until the temperature stays steady). > >Paul Alfille > >On Tue, Mar 20, 2012 at 10:43 AM, Todd Turner <[email protected]> wrote: > >> Hi All, >> >> I've got my OpenWRT and owfs set up working, thanks for the advice. What >> are people doing for outside temp sensors? I can't seem to figure out a >> way to keep it out of the rain, but not trap heat (using an upside down >> plastic container right now, right up against the house). >> >> Thanks! >> >> Todd >> >> >> >> >> >> >> >> >> ---------------------------------------------------------------------------- >-- >> This SF email is sponsosred by: >> Try Windows Azure free for 90 days Click Here >> http://p.sf.net/sfu/sfd2d-msazure >> _______________________________________________ >> Owfs-developers mailing list >> [email protected] >> https://lists.sourceforge.net/lists/listinfo/owfs-developers >> >> > >--0016e6d45a1d48583404bbaff26b >Content-Type: text/html; charset=ISO-8859-1 >Content-Transfer-Encoding: quoted-printable > >I put one in a plastic drinking straw with silicone sealant at the ends. It= > adds a little thermal lag, but self-heating shouldn't be a problem for= > relatively infrequent readings.<div><br></div><div>(You can experiment -- = >see if a sequence of measurements at fixed interval increases, then lengthe= >n the time gap until the temperature stays steady).</div> > ><div><br></div><div>Paul Alfille<br><br><div class=3D"gmail_quote">On Tue, = >Mar 20, 2012 at 10:43 AM, Todd Turner <span dir=3D"ltr"><<a href=3D"mail= >to:[email protected]">[email protected]</a>></span> wrote:<br><blockqu= >ote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc s= >olid;padding-left:1ex"> > >Hi All,<br><br>I've got my OpenWRT and owfs set up working, thanks for = >the advice.=A0=A0 What are people doing for outside temp sensors?=A0=A0 I c= >an't seem to figure out a way to keep it out of the rain, but not trap = >heat=A0 (using an upside down plastic container right now, right up against= > the house).<br> > > ><br>Thanks!<br><font color=3D"#888888"><br>Todd<br><br><br><br><br><br><br> ></font><br>----------------------------------------------------------------= >--------------<br> >This SF email is sponsosred by:<br> >Try Windows Azure free for 90 days Click Here<br> ><a href=3D"http://p.sf.net/sfu/sfd2d-msazure"; target=3D"_blank">http://p.sf= >.net/sfu/sfd2d-msazure</a><br>_____________________________________________= >__<br> >Owfs-developers mailing list<br> ><a href=3D"mailto:[email protected]";>Owfs-developers@li= >sts.sourceforge.net</a><br> ><a href=3D"https://lists.sourceforge.net/lists/listinfo/owfs-developers"; ta= >rget=3D"_blank">https://lists.sourceforge.net/lists/listinfo/owfs-developer= >s</a><br> ><br></blockquote></div><br></div> > >--0016e6d45a1d48583404bbaff26b-- > > >--===============8949809253152688374== >Content-Type: text/plain; charset="us-ascii" >MIME-Version: 1.0 >Content-Transfer-Encoding: 7bit >Content-Disposition: inline > >------------------------------------------------------------------------------ >This SF email is sponsosred by: >Try Windows Azure free for 90 days Click Here >http://p.sf.net/sfu/sfd2d-msazure >--===============8949809253152688374== >Content-Type: text/plain; charset="us-ascii" >MIME-Version: 1.0 >Content-Transfer-Encoding: 7bit >Content-Disposition: inline > >_______________________________________________ >Owfs-developers mailing list >[email protected] >https://lists.sourceforge.net/lists/listinfo/owfs-developers > >--===============8949809253152688374==-- > Steve ------------------------------------------------------------------------------ This SF email is sponsosred by: Try Windows Azure free for 90 days Click Here http://p.sf.net/sfu/sfd2d-msazure _______________________________________________ Owfs-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/owfs-developers
