fieldscout trufirm turf firmness meter with bluetooth sp6490sBased on technology developed by the United States Golf Association (USGA), the FieldScout TruFirm offers a quick, easy, and affordable method to measure the firmness of turf, bunker sands, and other playing surfaces. Data acquired from the device allows researchers and turf management professionals to measure the relationship between the compaction of the soil and the moisture level, in order to quantify playing conditions.