The SMT PMM Extension uses a plastic pipe or adhesive heat shrink over the threaded parts of the thread rod probe. 
 
Order of installation:  1. pre-drill to just 1/4" the probe length in the wood, and insert the probe in to the wood. If the PMM Extension comprises of a plastic sleeve used sealant at both ends of the tube to keep the water out of the measurement.
 
Make variations: 2", 4", 6", 8", 10", 12" contact SMT for custom lengths.
 
The PMM (Point Moisture Measurement sensor) extensions permit measurements to be taken from various depths within a chosen wood assembly (traditionally CLT, NLT, or Plywood).
 
*All units are sold in pairs.
*Customized length available and different prices may apply depending on the length. Please contact SMT for length options matching your specific project needs.