Portable odor quantitative detector

A portable odor detector, especially for a disposable hygiene product or its raw materials, comprising a housing, a display screen, a battery assembly, a circuit board and a sampling unit, the circuit board being electrically connected to the display screen, the battery assembly and the sampling unit, and the battery assembly and the sampling unit being held within the housing, wherein the sampling unit comprises a heat-resistant housing in which a detection chamber is defined, an odor sensor is arranged in the detection chamber, the sampling unit comprises an air pump having a suction port in airtight communication with the detection chamber,

• wherein an airflow sampling passage and an airflow returning passage are defined in the heat-resistant housing such that the two passages are in airtight communication with the detection chamber,
• wherein by operating the air pump, a test airflow from an object to be tested can be sucked into the detection chamber through the airflow sampling passage and then discharged out through the airflow returning passage, and
• wherein the odor sensor can heat the airflow in the detection chamber so as to decompose gas molecules of the test airflow into charged ions which can be converted to electrical signals, which signals can be transmitted to the circuit board for storage and/or displayed on the display screen as test results.