Does a multi-conductor DC clamp meter exist? Possibly using hall effect sensors in a specific orientation?
I typically work with 24-28V DC solenoids valves & pressure transducers with 2 and 4-conductor configurations, respectively. The solenoid valves can have 50'+ of insulated 2-conductor SJOOW cable from where they are actuated using solid state relays to the valves themselves. Accessing the solid state relays can be a pain and actually fitting a clamp meter around the + excitation line is difficult. I'm trying to figure out a tool to easily measure if a DC circuit is powered or not. Ideally, this tool would be in a clamp meter configuration, where I can wrap it around any 2-conductor DC cable and be given some sort of audible confirmation that a load is present and even a rough current draw estimate (does not need to be accurate).
I know what I'm asking for seems impossible but I've referenced this previous forum several times now in regards to AC circuits and it gives me hope. Can single clamp measure total current from 3 wires?
An even more ideal feature would be if this clamp meter could also work on a 4-wire pressure transducer (+ Excitation, - Excitation, + Analog, - Analog). However I don't know how the hall sensors could be aligned for this application. Especially if the cable is shielded twisted 2-pair which we typically use (sounds even more impossible).
Any input is appreciated!