When the implementation of a liquid level sensor, especially in an engine environment, is impossible with other technologies.
Gauging and dropping are appreciated developments with these probes.
Glass fibre-bundle probes
Proximity mode of operation
Head oriented in two half-moon tips.
This probe can be up to 600mm long on 2.1mm diameter with optical machining or end-fitting for liquid refraction
Compatible with many oils and non-absorbent liquids for near IR