The airborne microbial sampler is an important equipment for monitoring microbial pollution in the air, and its cleaning and maintenance work directly affects the accuracy of sampling results and the long-term stability of the equipment. The following is a detailed cleaning and maintenance guide:

1、 Cleaning process of airborne bacteria sampler:

1. Preparation work

Power off treatment: Before cleaning, the power must be disconnected to avoid the risk of electric shock.

Protective equipment: Wear gloves, masks, and goggles to prevent microorganisms from coming into contact with the skin or respiratory tract.

Tool preparation: specialized cleaning brush, soft cloth, neutral cleaner, 75% alcohol or chlorine containing disinfectant, pure water or distilled water.

2. Disassembly of components

Detachable components: According to the equipment manual, remove the sampling head, air inlet, filter membrane clamp, collection bottle and other detachable components.

Marking position: Mark the disassembled components to avoid installation errors.

3. Preliminary cleaning

Physical cleaning: Use a soft bristled brush or compressed air to remove large particle pollutants such as dust and fibers from the surface of the components.

Soak cleaning: Soak the detachable parts in a neutral cleaning solution (such as detergent), gently wipe with a soft cloth or sponge to remove oil stains and stubborn stains.

4. Deep disinfection

Chemical disinfection:

Alcohol disinfection: Wipe the surface of the components with 75% alcohol, especially the channels and sampling heads that come into contact with air.

Chlorine containing disinfectant: For highly polluted environments, chlorine containing disinfectants (such as sodium hypochlorite) can be soaked for 10-15 minutes, followed by rinsing with pure water.

UV disinfection: Place the components under a UV lamp and irradiate them for more than 30 minutes (ensuring no obstruction).

5. Drying and assembly

Natural drying: Place the cleaned parts in a clean and dry environment to air dry naturally, avoiding deformation caused by high temperature drying.

Assembly inspection: reassemble according to the marked positions to ensure that all connections are well sealed and there is no air leakage.

2、 Key maintenance points for airborne bacteria sampler:

1. Daily inspection

Appearance inspection: Check the device casing for damage, cracks, or stains after each use.

Functional testing: Start the device and check if the flow rate is stable (usually 28.3 L/min or as required by the manual), and if there is any abnormal noise.

Filter membrane replacement: Regularly replace the filter membrane based on usage frequency and environmental pollution level (usually every 10 samples or once a month).

2. Regular calibration

Flow calibration: Use standard flow meters (such as soap film flow meters) to calibrate at least once a year to ensure accurate sampling flow.

Microbial recovery rate testing: Conduct recovery rate testing using known concentrations of microbial aerosols to verify equipment performance.

3. Storage management

Clean storage: When not in use for a long time, clean and disinfect the equipment, cover it with a dust cover, and store it in a dry and ventilated environment.

Battery maintenance: If the device uses batteries, regularly charge or replace them to avoid battery leakage and damage to the circuit.