Here is a handy and free metering plugin that offers RMS, EBUR128, VU and PPM measurement.
mvMeter offers the following;
- behavior of classic analog VU and PPM meters
- multiple measurement modes: PEAK, RMS, EBU R128, VU and PPM
- multi-channel metering: stereo, left, right, mid, side channel
- large and accurate live meters
- adjustable pre-gain, automatic gain staging
- 64-bit internal processing
- 3 different meter themes
- GUI resizing up 400%, ready for 4k displays
It works with Windows XP or newer Mac OS X 10.5 or newer and has been tested with Pro Tools 10 and 12.
Click here for more information and to download mvMeter for free