Aerosensor is the newest and they start limited sales tomorrow. You might wait and see if someone like DC Rainmaker has a review

There have been lots announced, but very few released. The Notio is out and relatively inexpensive at $599. The AeroLab sensor used by ERO seems to work well, but I don’t know if they are available to the general public (I think it is a subscription service) and the software and training seems to have been in the “coming soon” category for some time. Aerosensor is the newest and they start limited sales tomorrow. You might wait and see if someone like DC Rainmaker has a review

I have a Notio but now also own a Aerosensor since a few weeks as we were one of the early adopters. I have had some small start up things, like my Garmin took the BLT signal from the speed sensor instead of Ant+ that the sensor needs. You have to actually pair that one speedsensor twice and the second time Garmin picks the Ant+ signal, you can delete the found BLT signal and now it works like a charm.
And the people over at Aerosensor are very responsive and helpful.

Jeroen

I just ordered one of these Aerosensors. Perhaps we could take this to Aerosensor for dummy thread, but anyway . . . are you just using the Garmin speed sensor that wraps around a hub?

That owner of Aerolab died very unexpectedly last year, I think it was August last year, and since then the whole website looks like nothing happens there anymore. Just the support page with manuals etc is live.
Everything else is gone.
The accompanying app probably still work but further then that I have no clue. I emailed them a couple of times but got no response.
Jim Manton here might have more insight since he still uses the system.

I have a Notio but now also own a Aerosensor since a few weeks as we were one of the early adopters. I have had some small start up things, like my Garmin took the BLT signal from the speed sensor instead of Ant+ that the sensor needs. You have to actually pair that one speedsensor twice and the second time Garmin picks the Ant+ signal, you can delete the found BLT signal and now it works like a charm.
And the people over at Aerosensor are very responsive and helpful.

Jeroen

Hey Jeroen,
I checked the aerolab email accounts that I receive from (info@aerolab as well as my own personal one). I did not see any emails from you. Perhaps there was a server or spam filter that did not allow it to pass through. At AeroLab Web development is on hold, new feature releases are on hold, but the product still works fantastically well (and has for the last 2+ years), people are still buying sensors. In fact, recently all of our stock was purchased by one user. So we are trying to re-stock while making hardware + software upgrades and upgrades to the iOS application.

Yes, our CEO passed away last year. It was a devastating time for family, friends, the company, everyone around us. I am trying to keep AeroLab going as best as I can to keep the legacy alive. Several contract engineers (close friends) are supporting in the background.
Chris

Do you know if Notio are still in business? They do not answer my emails so I wonder if they stopped.

No problem.
The data is recorded to a fit file at 1Hz. To keep things simple this is just offloaded from your Garmin in the usual way. The device itself doesn't store any data.
Here are the channels recorded in the FIT file record data in our CIQ app (includes the "Aerobody" body position sensor data).

Wind yaw angle, in degrees
Wind speed, in kph
Barometric pressure
Air density
Rider power as used by Aerosesnor
Power expended through aerodynamic drag
Power expended through road slope
Power expended through rolling resistance
Head height from aerobody, in cm
Chest height from aerobody, in cm
30 second (or as set in ACS CIQ app) rolling average CdA
Cumulative average CdA over lap

Slope can be backed out from barometric pressure and air density (i.e. change in elevation from one datapoint to the next is just
delta elevation = - airdensity x gravity x change in barometric pressure
negative because as you rise the pressure falls.
You can then get grade by dividing by change in distance.

Hope that answers your question!

So I read the manual on the website and your post above and it occurs to me that your device is sufficiently accurate to use the “real time” estimates of CdA, where these “real time” estimates are the values taken from a 500 to 1000m out and back run.

The Notio would provide real time CdA values, but you really had to do the post-processing in Golden Cheetah to get useable results because the real time estimates could be all over the map. My guess on the differences in the two instruments is the Aerosensor’s measurement of elevation (I think Notio used slope, which made it very sensitive to how level you got the device during the install).