You will find that the unbranded design things basic, which makes troubleshooting quick and stress-free for most setups.
Signal Isolator 4-20mA 1 In 1 Out Converter 0-10V DC Isolation Galvanic
What stands out about the unbranded brand is the lack of logos, keeping the look consistent with other anonymous hardware.
A nice touch is the gentle tension in the terminals on this unbranded relay, which grips wires without crimping them hard.