Dropping this here in case others are looking for this in the future as I had to work it out myself I have been looking for a water meter that will allow me to do some sub-metering and leak detection. I investigated the DAE meters and, in particular the DAE PD-100. This is a very nice meter that can be mounted in any direction.
The meter is built like a tank. It’s solid brass and bronze. It has a pulse counter output that allows 1 pulse per gallon to be counted. I tested the meter on various flows. It is very accurate down to a little below 1 GPM. This is in keeping with the specs. It continues to register output down to about 0.1 GPM although it is inaccurate, undercounting by as much as 30% at very low flow. Below that it stops counting entirely.
The Hershey meter installed by my utility is getting close to 0.1 GPH, so massively more sensitive.
Overall the DAE seems like a great meter. It would be nice to be able to detect lower flows and a totalizing readout - versus pulse - would be a pluse.
I tested this meter by putting it on a bench and runnging water through at a rate I could measure in a bucket.