1. METROLOGY
Dr. Nahlah Othman

2. METROLOGY it is the science of weights and measures.
the new definition :metrology is the science of measurement that include all theoretical &practical aspects of measurements .

3. 1-scientific or fundamental metrology:
Concern the establishment of quantity systems &units of measurements.
2-applied metrology:
Concern the application of measurements science to manufacturing &their use in society.
3-legal metrology :
Concern measuring instruments for the protection of health ,environmental &public safety

4. Medical metrology:
Science fields where precision is paramount ,such as medicine, use a wide array of metrology instruments.
These instruments include surgical robots, drug delivery monitoring devices ,laser –based medical instruments ,computer-assisted navigational systems, that use a four –dimensional positioning system to help surgeons perform complex operations

5. Metrology It is the science of weights and measures.
Tow types of systems of weights and measures are used in dispensing:
1-Old apothecaries system. 
2- The Classical metric system.

6. apothecaries system. Unit's for measuring solids(weights).
Grain (Gr): It is defined as the weight of a grain of wheat and it is equivalent to 0.06 gm.
Equivalent
Abbreviation
Unit's Name Gr
Grain
60 Grs
dr.
Drachm
8 dr.
oz.
Ounce
12 oz.
Ib.
Pound

7. apothecaries system. b. Unit's for measuring liquids.
Minim (M): It is defined as the volume corresponding to 0.06 ml.
Equivalent
Abbreviation
Unit's Name M
Minim
60 minims
fl.dr.
Fluid Drachm
 8 fl.dr.   
fl.oz
Fluid Ounce
16 fl.oz.
Pint

8. Metric System Unit's for measuring solids(weights).
Grain (Gr): It is defined as the weight of a grain of wheat and it is equivalent to 0.06 gm.
Equivalent
Abbreviation
Unit's Name
1000 ug mg
Milligram
1000 mg gm
Gram Kg
Kilogram

9. Metric System a. units Of Volume Equivalent Abbreviation Unit's Name
1000 ul ml
1-Milliliter
1000 ml L
2- Litter

10. Conversion from apothecarie's system to metric system:
Unit's for measuring weights.
Metric system
Apothecarie's system
0.06 gm
Gr.
4 gms
dr.
30 gms
oz.

11. Conversion from apothecarie's system to metric system:
a. units Of Volume
Metric system
Apothecarie's system
0.06 ml
1-M
4ml
2- fl.dr
30ml
3-fl.oz
500 ml
4- Pint ( 0 )

12. Conversion from metric system to apothecarie's system:
Unit's for measuring weights.
apothecarie's system
Metric system Gr
1- gm Ib
2-Kg

13. Conversion from metric system to apothecarie's system:
a. units Of Volume
apothecarie's system
Metric system
15 M
1- ml
2- L

14. Household measure (domestic measure)
apothecarie's system
metric system
household measure
0.06 ml
Drop
fl.dr
5 ml
Teaspoonful
1/2 fl.oz
15 ml
Tablespoonful
1 fl.oz
30 ml
Coffee cupful
5 fl.oz
150 ml
Teacupful
8 fl.oz
250 ml
Glassful
Each one ml = 15 drops
NOTES