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F7 pressure laboratory compare just for fun

honza_81
over 1 year ago

EDIT: Added TEMP test too.

Today I tried to compare F7 standard barometer with calibrated proffesional pressure monitor. I also compared the watch of colleagues - Amazfit GTR4 and older Honor watch GS Pro.

Measured "right" value was 960.8hPa

1st. place for Amazfit GTR4 with 961hPa (doesn´t show decimals)

2nd. place Honor watch GS Pro with 960hPa (doesn´t show decimals)

3rd. place F7 with 958.9hPa

When I owned F7Pro solar for two weeks, it shows 1hPa higher than my F7. So it was closer to the reference. In the end it doesn´t matter, because the trend is more important than real value, but if there was a possibility to add offset in some menu, it could be able to show perfectly accurate value :-).

I´m going to do some next temperature measurent tests in temperature chamber. Will post later :-).

 

  • 0 over 1 year ago

    Just for update. I got F7Pro and it´s better, not perfect, but much better for ambient pressure.

    F7 is off by -2hPa, F7Pro is off by -0.5hPa. We'll see how the Fenix 8 holds up :-). If I´m counting right, F8 will show +1hPa higher value Smiley.

  • 0 over 1 year ago in reply to honza_81

    Interesting, thank you for posting this comparison.

    So maybe I should get a 7 Pro for more accurate ambient pressure (that is a totally valid business reason to upgrade, of course..)

  • 0 over 1 year ago in reply to Data
    Data said:

    Interesting, thank you for posting this comparison.

    So maybe I should get a 7 Pro for more accurate ambient pressure (that is a totally valid business reason to upgrade, of course..)

    I also thank for his interesting data, but we should be careful what conclusions we infer from that data.

    For example, with the comparison posted of the F7 vs. the F7 Pro, it is not possible to say one is better/worse than the other.  We don't know if what we are seeing in the data is a truly better calibration of the pressure sensor in the F7 Pro, or just a perfectly normal unit-to-unit variation. If we had the data for 8 or 10 examples of each watch, maybe we could see a real difference; but with the data at hand, no such conclusion is possible.

    In all fairness, it is important to state that is not seriously implying that the difference between watches is significant.

    HTH

  • 0 over 1 year ago in reply to gaijin
    gaijin said:
    In all fairness, it is important to state that is not seriously implying that the difference between watches is significant

    Thank you for pointing that out. I was not serious but that was not too obvious.

     It is not a good idea to base a decision on 1 datapoint. If we have data from 100 F7 Pros and 100 F7s and the datasheets for the sensors in both types of watches, that might influence my next purchase if I find ambient pressure ultra important.

    Ibet there will be a fair bit of variation between the same type of watches. I have a bunch of the same temperature sensors here and they are all slightly different but within the manuafacturer's specificafions.

  • 0 over 1 year ago in reply to Data

    As I already wrote, the ambient pressure is worthless for normal use. It was just a comparison. Be happy with your watch ;-).