1. It is forbidden to extract gases containing oil, corrosive substances, and do not measure mixed gases that may react (such as hydrogen and oxygen). These gases may also explode in the counter. If you measure these gases, you need to contact the manufacturer to obtain more information before operating;2. Do not sample compressed air without high-pressure pressure relief equipment (such as high-pressure diffuser). All counters are designed to operate under one atmospheric pressure. The working position and sampling port of the instrument should be under the same air pressure and the same temperature and humidity environment to ensure the normal operation of the instrument;3. When sampling, avoid sampling the gas contaminated by the gas discharged from the counter itself;4. When connecting an external printer or connecting an external temperature and humidity sensor, you must turn off the counter first;when performing the printing operation, there must be printing paper on the printer, otherwise the print head will be damaged;5. When transporting, it should be handled with care to avoid vibration and impact. Especially for desktop particle counters, be more careful to avoid damaging the internal components;

6. Do not start the dust particle counter when the inlet pipe is covered or blocked;

7. It should be used in a clean environment to prevent damage to the laser sensor;

8. Aqueous solutions or other liquids cannot enter the sensor from the inlet pipe;

9. The dust particle counter is mainly used to test the clean environment of the purification workshop. When the measured place has loose particle materials, dust sources, and sprays, it must be kept at least twelve inches away from the inlet pipe. To prevent the above particles and liquids from contaminating the sensor and pipeline.