JS-420ISG-V2 4-20mA Current Loop Signal Generator,4-20mA 0-10V Signal Generator,Adjustable Voltage Current Simulator,for PLC Debugging, 0-22mA Sink Source for Transmitter,Built-in Rechargeable Battery: Amazon.com: Industrial & Scientific,Digital 4-20mA / 0-10V Voltage Signal Generator 0-20mA Current Transmitter USA | eBay,E8267C PSG Vector Signal Generator, up to 20 GHz [Obsolete] | Keysight,DC 0-10V 0/4-20mA Current Voltage Signal Generator USB Power Supply Interface Analog Simulator for PLC and Panel Debugging - AliExpress