tech-userlevel archive

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Old Index]

Re: Pressure sensors



On Wed, 2 Jan 2019, at 18:38:21 +0000, David Holland wrote:
> On Tue, Jan 01, 2019 at 12:03:31PM -0500, Greg Troxel wrote:
>  > > my sensor does fill ->value_cur with mPa, so pressure does fit into the
>  > > "everything else"-else{} with ->cur_value / 1000000.0 for printout in kPa.
>  > 
>  > Until very recently I had never seen pressure in kPa.  For atmospheric
>  > pressure, the standard unit seems to be hPa.  I realize that's a
>  > less-normal SI prefix, but it happens to match mbar.  But, I am seeing
>  > kPa more tha last 6 months.
> 
> Environment Canada was reporting pressure in kPa when I was a kid. Did
> they stop?

As a piece of Canadian trivia, yes, they still report pressure using
kPa. E.g. https://weather.gc.ca/city/pages/on-143_metric_e.html. (I
always assumed that was the norm.)

Dave




Home | Main Index | Thread Index | Old Index