Nothing wrong with that! I wish the data sheet <https://cdn-shop.adafruit.com/datasheets/1893_datasheet.pdf> gave more information --- it's hard to determine its repeatable accuracy. It claims 1.5 Pascal resolution, but doesn't give any clues as to linearity or drift.
My application was offshore sailboat racing, where you need absolute accuracy with little drift. It helps you determine where you are relative to a high pressure cell. The Dracal's form factor is also perfect for plugging into the navigational computer. -tk On Fri, Dec 27, 2019 at 5:04 PM p q <[email protected]> wrote: > I was thinking more on the opposite end of the spectrum - cheap and do it > yourself https://www.adafruit.com/product/1893 > > But either will work. > > On Fri, Dec 27, 2019 at 2:56 PM Thomas Keffer <[email protected]> wrote: > >> This is an option. It's pretty expensive, but it is super accurate >> <https://davidburchnavigation.blogspot.com/2019/08/exciting-new-barometer-for-navigators.html>: >> 0.2 >> mbar across 990 to 1040 mbar. I have one and like it a lot. >> >> I've written a weewx service for reading XDR pressure data >> <https://github.com/tkeffer/weewx-nmea-xdr>. >> >> https://www.dracal.com/store/products/usb_bar20_n/index.php >> [image: image.png] >> >> On Fri, Dec 27, 2019 at 2:01 PM p q <[email protected]> wrote: >> >>> Or buy a pressure sensor and hook it up to your computer directly. >>> >>> On Fri, Dec 27, 2019 at 12:36 PM galfert <[email protected]> wrote: >>> >>>> Correct. There is no console that broadcasts barometric pressure via >>>> RF. There wouldn't be a need. Any console that has built in barometric >>>> pressure has not need to broadcast that via RF as it is already built in, >>>> and therefore the console has the data that it needs from the barometric >>>> sensor to then upload to the supported online services. A station only >>>> needs one barometric sensor. That is the purpose of the WH32B for use on >>>> the HP2551-C which does not have a built in barometric sensor. The reason >>>> the HP2551-C doesn't have this sensor built in was probably a function >>>> first of the temperature/humidity sensor so that it would not cause >>>> erroneous indoor temperatures as having those inside the display console >>>> would cause those sensors to overheat and report a too high of a >>>> temperature. Different display technology like the one in the WH2910C are >>>> not prone to temperature increase due to display technology (it is LED vs >>>> LCD). The LCD displays overheat, which is why the HP2551-C has the >>>> temperature/humidity sensor external via the WH32B. So while we are at it >>>> the WH32B also incorporated the barometric sensor on that device. This >>>> allows you to have multiple displays at a lower cost all sharing the one >>>> indoor WH32B sensor. Ecowitt does not list the WH32B on their websites but >>>> if you contact them and tell them that you need the sensor with barometric >>>> sensor that would normally be paired with the HP2551-C they will know what >>>> you are referring to. I'm calling it a WH32B because that is what Ambient >>>> Weather Calls it. I don't really know for sure what Ecowitt calls it >>>> officially. There is different regular WH32 that is for outdoor use and >>>> that one does not have the barometric sensor....so you don't want that one. >>>> >>>> On Friday, December 27, 2019 at 1:02:22 PM UTC-5, Gert Andersen wrote: >>>>> >>>>> Hi >>>>> >>>>> So there are no display consoles that transmit a barometric signal >>>>> that can be intercepted by SDR? >>>>> >>>>> Gert >>>>> >>>>> On Friday, December 27, 2019 at 3:08:30 PM UTC+1, galfert wrote: >>>>>> >>>>>> Yet another solution to keep using SDR is to get a WH32B from Ecowitt >>>>>> that includes barometric pressure. This would be the same sensor that you >>>>>> would need for the HP2551-C display console as it doesn't have a built in >>>>>> barometric sensor. >>>>> >>>>> -- >>>> You received this message because you are subscribed to the Google >>>> Groups "weewx-user" group. >>>> To unsubscribe from this group and stop receiving emails from it, send >>>> an email to [email protected]. >>>> To view this discussion on the web visit >>>> https://groups.google.com/d/msgid/weewx-user/fa1f883b-0b6d-4719-a5a8-f462eaf469ee%40googlegroups.com >>>> <https://groups.google.com/d/msgid/weewx-user/fa1f883b-0b6d-4719-a5a8-f462eaf469ee%40googlegroups.com?utm_medium=email&utm_source=footer> >>>> . >>>> >>> >>> >>> -- >>> Peter Quinn >>> (415)794-2264 >>> >>> -- >>> You received this message because you are subscribed to the Google >>> Groups "weewx-user" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to [email protected]. >>> To view this discussion on the web visit >>> https://groups.google.com/d/msgid/weewx-user/CAA1SM21%2B%2BH59NMW1uxKgFOtNE1yq9MV_O7YucPNXB0TTwKgxNw%40mail.gmail.com >>> <https://groups.google.com/d/msgid/weewx-user/CAA1SM21%2B%2BH59NMW1uxKgFOtNE1yq9MV_O7YucPNXB0TTwKgxNw%40mail.gmail.com?utm_medium=email&utm_source=footer> >>> . >>> >> -- >> You received this message because you are subscribed to the Google Groups >> "weewx-user" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/weewx-user/CAPq0zEA3kJgpQr%3DfySSvcH%3DWTYXaemRbd3zTADsOKBtpxT_FUg%40mail.gmail.com >> <https://groups.google.com/d/msgid/weewx-user/CAPq0zEA3kJgpQr%3DfySSvcH%3DWTYXaemRbd3zTADsOKBtpxT_FUg%40mail.gmail.com?utm_medium=email&utm_source=footer> >> . >> > > > -- > Peter Quinn > (415)794-2264 > > -- > You received this message because you are subscribed to the Google Groups > "weewx-user" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/weewx-user/CAA1SM21tWgX-eWiydMnhrwy_5cHpvXn7yZffm-C_k2EQHbtGtA%40mail.gmail.com > <https://groups.google.com/d/msgid/weewx-user/CAA1SM21tWgX-eWiydMnhrwy_5cHpvXn7yZffm-C_k2EQHbtGtA%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "weewx-user" group. 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