How long does it take the heart rate sensor to detect heartbeat?

[KOH]

It takes mines about a good 18-20 seconds to get my heart rate from glances.
Seems a bit slow no?

 

[susan12369]

When I go to see it in glances, it takes about 2 seconds before it starts saying "measuring..." and then it takes about 15 seconds before it's displayed. Since it is measuring beats per minute, I assume it needs some time to calculate the current HR.

 

[maricc]

It takes mines about a good 18-20 seconds to get my heart rate from glances.
Seems a bit slow no?

Yes agreed. Longer than I would have guessed.

 

[AtheistP3ace]

Yes about 15 secs or so for me. I thought it would be faster.

 

[mrboba1]

How long does a CNA take to check your pulse?

(I'll tell you - it's a minimum of 15 seconds, but usually 30, and they multiply by 2 (or 4))

 

[zlin9596]

i feel like auto checking heart rate is kind of off to the normal open glance and check. how are your measurements?

 

[greytmom]

About 15 seconds sounds about right... you need at least that long to get a heart rate that makes sense.

 

[bjdraw]

When using the workout app, it samples the HR every 5 seconds. My Mio LINK optical wrist HR monitor samples every second. If I have my Mio Link paired with my Watch the HR glance updates instantly.

 

[andrewj]

Agreed, it takes longer than it I would expect.

 

[tivoboy]

yes

yeah, its between about 18-20 seconds, and I think it's probably trying to hit 20 seconds since that would be an easier BPM cal to do..HR recorded X 3..

Probably gives a better reading than one that does it faster.

 

[maliu]

As a nurse, I usually count for 15 seconds, but if it's irregular I go a full minute. It takes time. Relax.

 

[lchlch]

I think they are going for accuracy.

 

[Lloydbm41]

It takes mines about a good 18-20 seconds to get my heart rate from glances.
Seems a bit slow no?

I have just done 7 back to back samples of my Moto 360 heart rate via Google Fit and compared it to my very accurate Reebok chest strap HR monitor.

All 7 samples averaged out to between 20 and 27 seconds. All 7 samples were within 1-2 beats of my chest strap monitor. While I do not have an Apple Watch to do this with, I would say that 15-20 seconds on the Apple Watch is actually slightly quicker than the competitors.