Pass box is a clean room ancillary equipment, mainly for clean area and the clean area between the clean area and non-clean area between the delivery of small items to reduce the number of clean room to open the door, the clean room of the pollution Reduce to a minimum. Pass box made of stainless steel, smooth and clean. Double-door interlocking, effectively prevent cross-contamination, with electronic or mechanical interlocking device, and configure UV germicidal lamp. Transmission windows are widely used in micro-technology, biological laboratories, pharmaceuticals, hospitals, food processing industry, LCD, electronics factory, and all other places need air purification. Pass boxes has mechanical interlock pass box, electric interlock pass box, pass box with air shower, dynamic pass box.