1. A device (100) to measure concentration of hemoglobin in blood samples (142)
comprising:
a motor (120);
a tray (130) mounted on the motor (120) and configured to be rotated at a predetermined speed by the motor (120) thereof, wherein the tray (130) comprises:
graduations (134) on a surface (132) of the tray configured to facilitate aligned placement of one or more linear receptacles (140-1, 140-2) and to measure the concentration of the hemoglobin in the biological samples (142), wherein the one or more linear receptacles (140-1, 140-2) are configured to receive the biological samples (142) and to be rotated at the predetermined speed for a predetermined time to separate each sample (142) into two or more components (144, 146).
2. The device as claimed in claim 1, wherein the motor (120) is a hand-held motor.
3. The device as claimed in claim 1, wherein the device (100) is portable.
4. The device as claimed in claim 1, wherein the graduations (134) are distributed on the tray (130) radially.
5. The device as claimed in claim 4, wherein the graduations (134) are scaled in a plurality of ratios to accommodate the one or more linear receptacles (140-1, 140-2) with varying volume of blood samples (142).

6. The device as claimed in claim 1, wherein the graduations (134) are based on an empirical relation between a packed cell volume (Hct) and hemoglobin (Hb).
7. The device as claimed in claim 6, wherein the empirical relation is given by
Hb (g/dL) = 0.34 x Hct (%)
8. The device as claimed in claim 1, wherein the device (100) comprises a rotatable mounting head (110) mounted on the motor (120).
9. The device as claimed in claim 8, wherein the tray (130) is mounted and fixed on the mounting head (110) configured for conjoint rotation.

10. The device as claimed in claim 1, wherein the linear receptacles (140-1, 140-2) are capillary tubes or sample collection tubes.
11. The device as claimed in claim 10, wherein the linear receptacles (140-1, 140-2) are disposed radially on the surface (132) of the tray.
12. The device as claimed in claim 10, wherein the capillary tubes are sealed at the ends (172, 174) using an adhesive paste.
13. The device as claimed in claim 1, wherein the tray (130) is a sheet made of material selected from polyethylene terephthalate (PET), polyethylene or polycarbonate.
14. The device as claimed in claim 1, wherein the motor (120) is a dc motor driven by a dc source at a predetermined speed.
15. The device as claimed in claim 14, wherein the dc source is a battery or a dc supply comprising dc or ac source.
16. The device as claimed in claim 14, wherein the speed of the motor (120) is controlled by a controller.