Here is a quick look at one moisture content testing method for wood flooring, using a moisture meter. We always want to make sure we test this before install to make sure our wood is going to be as stablr as possible once installed. Wood floors expand and contract throughout the year as temperature and humidity levels change so starting with a property acclimated product is essential. Here is a link to the moisture meter featured in the video. This is an affiliate link and I receive a small commission on qualified purchases made when using this link.
Delmhorst Moisture Meter: https://amzn.to/46qUuMK