I dont think that being an empiricist has anything to do with being a Sensors. John Locke was a radical empiricist, he thought that we are born with an empty mind to begin with, yet his philosophy was very abstract. As a man he was also highly Intuitive. Locke was an INTJ.
So was Freud. Freud's imagination worked in a way to discover realms of the mind that seem otherworldly. The unconscious. The empiricist and authority oriented aspects of his thought are better connected with his Te mindset. Though clearly, he was quite the visionary, as his Intuition was preponderous over his Extroverted Thinking. He was a natural brainstormer and his mind would never want to dismiss anything, regardless of how ludicrous it may seem on the surface. Yet much like a typical INJ, whilst he very much takes many of those seemingly bizarre ideas seriously, externally he has to make a judgment, and hence this makes him seem like he is dismissing ideas that he is actually dwelling on for the sake of working his imagination. Thats the difference between an INTJ and an INTP. Both enjoy exploring complex ideas, INTJs tend to do this for the sake of imagination, whilst INTPs have clear-cut problems to solve and are more focused in this regard.