Koolance liquid level sensor with column float and 2-pin connector. Circuit is normally open until float reaches the bottom of the metal column. Total length = 77mm (3″), with 70mm (2.76″) below the knurled cap. Nickel plated brass, G 1/4 BSPP threading.
NOTE: SEN-LVL70 is a magnetic reed open/close contact switch intended for signals in the 50-100mA range. It should not be used on higher power outputs like fan headers or controllers.