Portable 3-phase Watthour Meter Tester
MT-1/NT9 - Probewell Lab Inc. (Probewell)
Improving on the technology developed by Probewell, the MT‑1/NT9 is the first all‑around Wh meter tester able to test both single‑phase and 3‑phase self‑contained and CT rated meters. All this at a weight of only 6.4 lbs!