Sensa Classic Rollerball Jet BlackErgonomically Perfect, Again? Sensa Pens were originally introduced in 1995 and then vanished about ten years later. We sold more Sensa pens during those ten years than any other single pen: period. Thats what a huge seller Sensa used to be. The patented grip section was a vastly treasured component and loved by thousands of consumers. The ergonomic Patented Plasmium fluid gel grip was unique and obviously stress relieving within minutes. What