UVC Light Meter | Demystifying the Efficacy of the Pass Box
The epidemic of novel coronavirus pneumonia in Wuhan affects the hearts of hundreds of millions of people at all times. After construction began on Vulcan Mountain and the simultaneous live broadcast of the network was started, many netizens have become "network supervisors". Every day, tens of millions of people are online watching. The final results after the completion of Vulcan Mountain Hospital also reassures the majority of our fellow citizens. Although it is a hospital built in a short period of time, it has this comprehensive medical facility. In addition to this, many novel equipment have been added. What people are curious about is the pass box that connects the ward with the outside world. What effect does the pass box have? How to ensure its effectiveness with a professional UVC light meter?
1. What is the pass box? What effect does it have?
The pass box is an auxiliary device used to transfer items between two spaces. It usually uses a stainless steel plate and a glass shell with a built-in ultraviolet germicidal lamp. The pass box can be installed between the clean zones. It can also be used between the clean zone and the non-clean zone. The pass box can be used to transfer items, which can reduce the number of door openings in the clean zone and reduce pollution. In the ward of Vulcan Mountain Hospital, there are a large number of patients who have been diagnosed with the new coronavirus temporarily. In order to reduce the close contact between patients and medical staff, installing such a pass box between the ward and the outside world can first exchange the items between the two parties. Once the disinfection and sterilization are carried out, the cross-infection phenomenon can be effectively avoided.
2. What is the principle of the pass box?
The main device for disinfection and sterilization in the pass box is the UVC germicidal lamp. At present, most of the ultraviolet germicidal lamps used in the pass box are low-pressure mercury germicidal lamps with a peak wavelength of 253.7nm. UVC can change cells and destroy cell structure, which makes viruses, microorganisms and other proteins lose their ability to check and reproduce, which is what we call sterilization.
In Vulcan Mountain Hospital, in addition to the medical staff having to come in close contact with the patient during the necessary diagnosis and treatment. Other items can be transferred to the pass box. The medical staff opens the one side of the pass box, places the items in the pass box and closes the door. At this time, the patient can obtain the items by opening the door on the other side of the pass box. After using, put it back in the pass box. At this time, you can turn on the UV lamp in the pass box, sterilize the item and then take it out to ensure the cleanliness of the item after it is transferred to the outside.
3. Does the pass box have a useful life?
The main function of the pass box is the ultraviolet lamp. It is well known that the ultraviolet lamp is a device that will decay with the increase of the use time. The irradiation intensity of the ultraviolet lamp will decrease with the degree of attenuation. If it is lower than the national standard, the specified intensity value cannot ensure the sterilization effect. Therefore, it is necessary to periodically use a professional uvc light meter to detect the irradiation intensity of the ultraviolet germicidal lamp in the pass box. Once the intensity of the ultraviolet lamp is found to be attenuated, it is necessary to replace it with a new ultraviolet tube. So that the effectiveness of the delivery window can be ensured.