Air quality monitor. This device is being used to measure the amount of pollutants in the air. This is the ETL 3000 model. Above the monitor is an anemometer (black,upper right),a device used to measure wind speed and direction | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Percival, Steve |
Taille de l’image : | 3433 px × 5150 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |