# Sub-micrometer resolution liquid level sensor based on a hollow core fiber structure

> Research article (Optics Letters, 2019) · cited 50× · AI/ML

**Wikidata**: [openalex:W2939634884](https://www.wikidata.org/wiki/openalex:W2939634884)  
**Source**: https://4ort.xyz/entity/sub-micrometer-resolution-liquid-level-sensor-based-on-a-hollow-core-fiber-structure