{HEAD ~ The sensing element} can be coupled to a bottle of fluid, or {TAIL ~ a carrier} with a timer 
coupled to
{ HEAD ~ The sensing element } can be coupled to a bottle of fluid , or { TAIL ~ a carrier } with a timer
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH