The core of the daily inspection of transfer Windows is “quickly identify key components + verify the effectiveness of sealing”, ensuring there are no functional defects before each use. The specific methods revolve around the four core aspects of “sealing, door locks, disinfection equipment, and status identification”.

Sealing performance inspection
Sealing performance inspection: Inspect whether the sealing strip is intact, undamaged, properly attached, not deformed, or showing signs of aging and cracking. Inspect for the absence of foreign objects (such as dust or material residues) on the bonding surface.
Gap inspection: Use a 0.1mm thick feeler gauge to inspect the junction between the door body and box body, moving evenly along the circumference. The gap passes inspection if the gauge cannot be inserted or insertion depth is less than 5mm. Alternatively, inspect for light leakage by closing both doors, turning on a flashlight on one side, and checking from the other side.
Pressure difference auxiliary inspection: If the pressure difference in the clean room fluctuates abnormally and other causes are ruled out, inspect the seal of the transfer window for possible failure.
Inspection of door locks and door bodies
Switch test: Open both doors respectively to confirm that the door locks are flexible, can be reliably locked after closing, without loosening or jamming, and the interlocking function of the two doors is normal (when one side is opened, the other side cannot be opened).
Door body condition: Check if the door body is deformed. After closing, it should fit tightly with the box body without any curled edges or uneven gaps.
Disinfection and inspection of auxiliary equipment
Ultraviolet lamp: After turning it on, observe whether it emits light normally. Check the cumulative usage time record. It has not exceeded its lifespan (usually 1000 hours), and the lampshade is undamaged and has no severe dust accumulation.
Fan/filter device (if any) : After starting, listen for any abnormal noises, confirm that the air supply is normal, and that the high-efficiency filter is undamaged and has no air leakage marks.
Disinfection button/Program: Test whether the disinfection start and stop functions are sensitive and whether the timing is accurate (in accordance with the SOP set duration).
Status identification and record inspection
Check whether the transfer window is affixed with a “Qualified” label and if the label is within its validity period.
Check the previous usage record to confirm that the cleaning and disinfection, as well as the fault conditions, have been truthfully filled in, and there are no unhandled abnormal records.