Pack of Hole Liner sets for use with Tramex Hygro-i ® relative humidity sensors.
To perform AS 1884 - 2012 & ASTM F2170 in situ RH testing of concrete floors and slabs.
Requires using a 3/4" (19mm) drill bit (not included) available here https://restoresolutions.com.au/products/masonry-drill-bit-19mm
All Tramex products carry a full satisfaction guarantee including a one year warranty against defects in parts & workmanship. Proof of purchase is necessary.