A technique used to determine an individual’s personal exposure to a chemical, physical or biological agent. This is done by means of a sampling device worn on the worker’s body (e.g., personal monitor). the monitoring of hazardous chemicals is done at the breathing zone; the monitoring of noise is done at the ears. (An OSH glossary used in safety and health at work which is, adopted by ILO {102}.. The term definition has been obtained from the secondary source