Hemoglobin (Hb) is the protein molecule present in red blood cells of the human blood which is responsible for carrying oxygen. The Hb levels need to be tracked periodically as the decreased levels can lead to diseases like anemia. Existing technologies for testing Hb levels of a given human blood sample include bulky laboratory instruments which are difficult to be carried in remote areas or high cost per test imported point-of-care devices. As a result, anemia is one of the most common disease in women and neonatal. This paper discusses a methodology to device an instrument which is both portable and inexpensive along with a comparative study with the existing devices. The proposed methodology is primarily based on the Beer Lambertís Law.