The alarm device introduced here has the advantages of simple structure, small components and easy installation. It uses the principle of bridge balance, the main components are four resistors and a small electromagnetic relay. Control relay is a classification of Signal Relay, is commonly used in automatic control system devices, generally used to connect and disconnect the circuit, is an important component of automatic control and remote control circuit. Control Relay,Control Latching Relay,Industrial Control Relays,Control Equipment Relay Ningbo Xingchuangzhi Electric Appliance Co.,Ltd. , https://www.xingchuangzhi.com
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