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DC 24V Current Signal Isolator Transmitter 4-20mA PLC Detect Signal Conditioner(One in and Two Out 4-20mA to 4-20mA): Amazon.com: Industrial & Scientific
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Adjustable 4-20mA Signal Generator Current Voltage Analog Simulator 0-10V/0-22mA Signal Sources for Value Adjusting PLC Controller Panel LED Testing Calibration: Amazon.com: Industrial & Scientific
Adjustable 4-20mA Signal Generator Current Voltage Analog Simulator 0-10V/0-22mA Signal Sources for Value Adjusting PLC Controller Panel LED Testing Calibration: Amazon.com: Industrial & Scientific