| 摘要 |
A fog density monitor 1 comprises means to indicate fog density and forward data to a controller. A system for monitoring and controlling fog density further comprises a fog delivery apparatus (300, Fig 3) and a controller for controlling the delivery of fog in response to the fog density data. The system finds application in maintaining the freshness of produce by promoting natural hydration and distributing biocides. The monitor may comprise an infrared transmitter 25 arranged opposite a receiver. The system may comprise a plurality of monitors 1 and delivery apparatuses (300, Fig 3), as well as a plurality of fans to maintain uniform fog density. The fog may be dry fog and may be generated by piezoelectric ultra-sonic nebulisation. The fog or mist may include a chemical agent such as a biocide or plant food. |
