Liquid-condition detection sensor

摘要

A liquid-condition detection sensor ( 1 ) includes a concentration sensor element ( 260 ) for detecting the condition of liquid to be measured; a wiring board ( 40 ) including a driving control circuit ( 41 ) disposed above the concentration sensor element ( 260 ); a cable ( 50 ) mechanically connected to the wiring board ( 40 ), extending downward from the wiring board ( 40 ), and establishing an electrical connection between the driving control circuit ( 41 ) and the concentration sensor element ( 260 ); an inner tube ( 221 ) surrounding at least a portion of a cable ( 50 ) in a loose condition; and a fixing holder section ( 94 ) fixedly holding a portion ( 51 ) of the cable ( 50 ) located between the wiring board ( 40 ) and the concentration sensor element ( 260 ).