Yes, the 3.5x1.5, 12mm is exactly what I had to order. Pain was I had to order in the quantity of 50 and I only needed one. All the shorter plugs came loose without falling out, so I had to keep pushing them back in. The 12mm stays in, but I agree that I had to program the voltage each time, which was a pain. But the Agilent linear bench supply can provide much cleaner power to the unit than any wall warts, if that matters.