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Solid State Relay 4-20mA Input Professional 120A Fast Switch Solid State Voltage Regulator Easy Installation with Insulated Housing for Induction Coil : Amazon.ca: Industrial & Scientific
Dc24v 4-20ma Current Signal Detection Control Relay Switch Set Upper And Lower Limit Alarm Module Rs485 Communication - Personal Care Appliance Parts - AliExpress
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DC 0-1000V Input 4-20mA/RS485 Output Din Type Voltage Transmitter DC V – ComWinTop