Electric meters SDM120, SDM220. Part 1. Introduction
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Manufacturer's website: http://www.eastrongroup.com/
Product links:
1) Eastron SDM120-MODBUS Electricity Meter: https://www.aliexpress.com/item/32503...
2) Eastron SDM220-MODBUS Electricity Meter: https://www.aliexpress.com/item/32442...
SDM230-MODBUS: https://www.aliexpress.com/item/32698...