Change that - it appears that a PRT (or RTD) might be the way forward, rather than a thermocouple.
On 27 October 2011 13:17, Phil White <[email protected]> wrote: > Hi Paul, > > Yes, I know of this product. I have emailed them for clarification on > a couple of points (it appears that you cannot adjust the hysteresis), > but essentially this is the sort of product I need... except that it > is a room temperature sensor, and I need to measure water temp. I > certainly intend to get 1 to play with. > > The DS1821 is, as Patryk says, is *almost* what I want - except that > it is either a temp sensor, *or* a thermostat, but never both at the > same time, due to the fact that the DQ pin is dual purpose, and it is > going to be a pain to flip it from one state to the other. > > Using a thermocouple is the approach I favour at the moment - but that > is only because I haven't come across many alternatives. > > Thanks for the help so far. > > > > On 27 October 2011 11:38, Paul Alfille <[email protected]> wrote: >> Embedded Data Systems has exactly that in their "Environmental Sensors" >> (which is tested and supported by owfs). >> >> http://owfs.org/index.php?page=eds-enviromental-sensors >> >> Different models also can sense humidity, pressure and light. >> >> 2011/10/27 Patryk <[email protected]> >>> >>> Dnia 27-10-2011 o 09:55:38 Phil White <[email protected]> >>> napisał(a): >>> >>> > What I need is for a relay to automatically trigger (or, even better, >>> > for 1 of 2 relays to trigger depending on Hi/Lo) *WITHOUT* any >>> > commands or communication over the 1-wire network. 1-wire would be >>> > used simply to program the device in the first place. >>> >>> There DS1821 it's almost what you want. >>> >>> http://www.maxim-ic.com/datasheet/index.mvp/id/2794 >>> >>> >>> -- >>> p4trykx >>> >>> >>> ------------------------------------------------------------------------------ >>> The demand for IT networking professionals continues to grow, and the >>> demand for specialized networking skills is growing even more rapidly. >>> Take a complimentary Learning@Cisco Self-Assessment and learn >>> about Cisco certifications, training, and career opportunities. >>> http://p.sf.net/sfu/cisco-dev2dev >>> _______________________________________________ >>> Owfs-developers mailing list >>> [email protected] >>> https://lists.sourceforge.net/lists/listinfo/owfs-developers >> >> >> ------------------------------------------------------------------------------ >> The demand for IT networking professionals continues to grow, and the >> demand for specialized networking skills is growing even more rapidly. >> Take a complimentary Learning@Cisco Self-Assessment and learn >> about Cisco certifications, training, and career opportunities. >> http://p.sf.net/sfu/cisco-dev2dev >> _______________________________________________ >> Owfs-developers mailing list >> [email protected] >> https://lists.sourceforge.net/lists/listinfo/owfs-developers >> >> > ------------------------------------------------------------------------------ The demand for IT networking professionals continues to grow, and the demand for specialized networking skills is growing even more rapidly. Take a complimentary Learning@Cisco Self-Assessment and learn about Cisco certifications, training, and career opportunities. http://p.sf.net/sfu/cisco-dev2dev _______________________________________________ Owfs-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/owfs-developers
