Q: Is the R-3W-DR-C6 compatible with R-3WMT-LMF?

A: The R-3W-DR-C6 is compatible with the R-3WMT-LMF. You will require 2 of the R-3W-DR-C6  since the R-3WMT-LMF is comprised of 2 devices, the flashing voltage indicator (R-3W) and the safe-test point (R-3MT). If you have further questions please reach out to sales@gracetechnologies.com