# Research on a Non-Invasive Hemoglobin Measurement System Based on Four-Wavelength Photoplethysmography

> Research article (Electronics, 2023) · cited 26× · AI/ML

**Wikidata**: [openalex:W4324092549](https://www.wikidata.org/wiki/openalex:W4324092549)  
**Source**: https://4ort.xyz/entity/research-on-a-non-invasive-hemoglobin-measurement-system-based-on-four-wavelength-photoplethysmography