air pressure

[nickd]

hpa = hectopascal
mb = millibar
1mb = 1hpa
so as a rule of thumb I would multiply mb by 1 to get hpa and vice versa!

 

[cagey]

whats the difference between mb and hpa and is there an easy rule of thumb for quick conversion.
Keith

 

[Skylark]

1 bar or 1,000mbar is 100,000 Pascal or 100 kPa or 1,000 hPa. Same.

 

[cagey]

Thanks that was my understanding, but all bbc weather reports and my old baro quote mb. new digi baro chrissy pressie reads hPa and no matter how many times I calibrate to local pressure the new baro resets 15 hPa lower.
Obviously faulty

 

[VicS]

Faulty if you cannot set it to read what you want it to but you don't live up a hill somewhere and getting in a muddle with the differences due to that.

My good baro .. a proper scientific instrument ...is set to read actual pressure so indicates 13mb lower, due to our height above sealevel, than the one on the living room wall which is set to the met-office reported pressure

 

[cagey]

Faulty if you cannot set it to read what you want it to but you don't live up a hill somewhere and getting in a muddle with the differences due to that.

My good baro .. a proper scientific instrument ...is set to read actual pressure so indicates 13mb lower, due to our height above sealevel, than the one on the living room wall which is set to the met-office reported pressure

'Hadn't thought of that'
thanks

 

[sarabande]

Cagey

how was the railway trip ?