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Check the listing for details. 20A Range Current Sensor Module ACS712 ACS712ELCTR-20A For Arduino Module. Condition: New. Listed at 2.58 USD. ACS712(20A) Module x1. Internal Conductor Resistance: 1.2mΩ. Sensor: ACS712ELCTR-20A. Working Current: 10mA. We will leave it for everyone that leaves it for us.