Fig. 1

Diagram of Y-tube olfactometer. 1: air generator; 2: main flow meter; 3: split-flow Y-tube; 4: flow meter; 5: activated carbon filter; 6: pure water; 7: the odour of treatment and the control; 8: ball-shaped trap; 9: Y-tube olfactometer
Diagram of Y-tube olfactometer. 1: air generator; 2: main flow meter; 3: split-flow Y-tube; 4: flow meter; 5: activated carbon filter; 6: pure water; 7: the odour of treatment and the control; 8: ball-shaped trap; 9: Y-tube olfactometer