{HEAD ~ The sensing element} can include a water permeable material positioned in between {TAIL ~ two water impermeable material} 
{ HEAD ~ The sensing element } can include a water permeable material positioned in between { TAIL ~ two water impermeable material }
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL