Access - Barometer Specification Missing

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If Access is replacing SmartHub, then I have to assume there is also a barometer inside the Access Hub. If so, what are the specifications for that new barometer?

Wouldn't it be worth posting those under the "Specifications" tab for the Access webpage? Without that, customers will not even know that their new access actually sends pressure. If it does not send pressure, then my follow up question is how will I get pressure to Weather underground for my 5-in-1 Pro after the Smarthub is phased out?

As a side note, there is also no support check box for 09155m Access in the Related Categories below, so you might want to add that to keep all Access issues together. Thanks.
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Jerry

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Posted 3 months ago

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John Z

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Jerry,


Yes, Access has a barometer inside. If you find AcuRites' sensor comparison chart, you will see that Atlas 7/8 , which must use Access, claims +/- .09 inHg for the barometer. That likely applies to both the barometer in the display as well as the one in Access. The manufacturer's spec for the device in Access is a little better yet, but it's AcuRite that is in charge of claiming specs.
(Edited)
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Jerry

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Thank you for pointing out the comparison chart John Z.

Something is still odd, as the comparison chart depicts that indoor pressure sensors show updates every 12min, 5min, 1 min depending on if you have the 5in1, Atlas, or Elite connected.  That really doesn't make much sense if the pressure sensor is built-into the Access, unless it is throttling down the update rate if a cheaper station is connecting to it.

The chart also fails to mention the resolution of the sensors such as Temp, Wind Speed, Pressure, which is somewhat independent of accuracy.
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John Z

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Jerry,


Here's the rub, I think.


Atlas Elite has a unique integrated display and hub. Baro data will come from inside that.


Atlas 7/8 must use Access to report baro data to the web. Baro data will come from a sensor within Access.


The 5n1 works with either Access or a smartHUB. Both have baro sensors inside. They are different components with different specs reporting via different architectures. What do you put on the chart then for the 5n1? Hub data or Access data?


Yeah, confusing.


The new barometer inside Access is a tiny sensor, physically smaller than the one in the smartHUB. It appears to be a part from TE Connectivity, formerly Tyco Electronics. The datasheet for it claims it is capable of reporting both pressure and temperature with a 24 bit sigma-delta analog to digital converter built in. It has both capabilities so as to be able to establish elevation. Awesome, though I think Access currently only uses the pressure data.


I have installed four Access, and am currently running three. Baro data has been uncannily tight between co-located devices, and in excellent agreement with a nearby airport station, all well inside the stated specs.


If you are keenly interested in the detailled capabilities of the sensor components used in weather instruments, learning their part numbers, and manufacturer, and digging into datasheets is informative.

For Atlas7/8 for example, information from FCC filings suggest that: -T&H sensor is SHT31.
- UV/Light sensor is from SILabs, SI1133
- wind position sensor is an integrated Hall device from Austria Micro Systems, AS5600.
- wind speed is still a magnet and reed switch based click rate system.
(Edited)
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John Z

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Jerry,

Also, the reporting time differences you mention are in a chart section labelled Indoor, so I think that refers to the display consoles, which are different for each sensor family.