The ZDC-622A is an STS (StandardTransfer Specification) compliant, RFID Card type, electronic valve controlledprepayment water meter. It adopts Philips Mifare S70 Card to realize PrepaymentFunction and bi-directional communication between water meter and vendingcenter system for data tranfer. The brass body base meter has been supplied andproven by millions of service connections for reliable and cost-effectiveconsumption measurement. Prepayment function and excellent anti-tamper featurelike Magnetic field protection to help utilities for Revenue water protectionand consumer management.