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crwdns2933797:0Andrew Bookholtcrwdnd2933797:0crwdne2933797:0
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| + | [* black] The true innovation in the Smart Meter is its ability to relay power consumption statistics without direct contact from a meter reader. It accomplishes this by sending encrypted signals on the 900 MHz [link|http://en.wikipedia.org/wiki/ISM_band|ISM band]. The antenna can be seen on the rear side of the board near its bottom edge. |
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| + | [* icon_note] Elster designed the antenna pattern to force signals away from households. |
| + | [* black] Elster Watthour Meters only relay information when they are spoken to by other meters in the mesh. When they relay information the amount of RF radiation emitted is ~1/4 W, which is less than most cellular phones. |
| + | [* icon_note] Elster designed its meters to transmit data every six hours for 40 ms at a time. |
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