Who makes the least expensive ohmmeter or DMM with a 4-wire (or “Kelvin”) resistance measurement?
If you’re wondering, a 4-wire resistance measurement uses 2 wires to pass a current through the resistance and 2 other wires to measure the voltage drop across it. This completely ignores the resistance in the test leads, so they can have a million or more times the resistance of the device under test and not interfere. This is most important for measuring low resistances of, say, less than an ohm, or certainly less than a 10th or 100th.