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emonBase - web-connected base-station http://shop.openenergymonitor.com/emonbase-web-connected-base-station/
emonTx Arduino Shield SMT http://shop.openenergymonitor.com/emontx-arduino-shield-smt/
100A max clip-on current sensor CT http://shop.openenergymonitor.com/100a-max-clip-on-current-sensor-ct/