One of the questions I asked in the recent article Heart Rate Monitor Data Integrated into OLN Broadcasts was how is heart rate monitor data transmitted beyond the receiver on rider's bikes? The standard transmitters for most heart rate monitors have a range of about 2 meters (6 feet).

The other day Lennard Zinn of VeloNews answered this question for both SRM Training Systems and Polar Electro. Zinn was asked what Jens Voigt carried in his seat bag during Stage 9, and he responded:

That is the transmitter that sends telemetric data live from Voigt's SRM. And yes, some of the other Tour riders are doing the same thing. Voigt, Matthias Kessler (T-Mobile), Gerrit Glomser (Lampre) and Sebastian Lang (Gerolsteiner) all have been wired for live SRM data on various stages.

Zinn says that data from SRM power meters is being shown on the ARD television network in Germany and the T-Mobile Team website.

He goes on to say that the Polar auxiliary transmitter is smaller than those being used by SRM. Polar's transmitters relay their data for use on OLN.

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