Liquid chemical dispensing system with sensor

摘要

A connector (14) comprising:
a connector head (54);
a probe (46) extending from the connector head (54) having a flow passage therein;
a first key element (52) configured to mate with a second key element; and
sensor means (20) for sensing when the first key element is properly mated with the second key element when the protrusion and the notch are mated.