UV Light Meter for 254nm Germicidal Lamp

From:Linshang Time:2020/03/18 10:30:00 Browse:176
254nm germicidal lamp is widely used in life and industry. We usually use a professional UV light meter to test the intensity of the germicidal lamp.

Ultraviolet disinfection is widely used. The main occasions are hospitals, schools, nurseries, movie theaters, buses, offices, homes, etc. It can purify the air and eliminate musty smell. In addition, it can generate a certain amount of negative oxygen ions. The room is particularly fresh after being disinfected by ultraviolet rays. UV disinfection in public places can prevent some bacteria from spreading through the air or the surface of objects.
       The germicidal lamp is actually a low-pressure mercury lamp. The low-pressure mercury lamp emits ultraviolet light by being stimulated with a lower mercury vapor pressure. The differences between 185nm and 254nm UV germicidal lamps are as follows:

  1. The principle of sterilization is different. The 185nm ultraviolet germicidal lamp can change the oxygen in the air into ozone. Ozone has a strong oxidizing effect, which can effectively kill bacteria. It can make up for the shortcomings of ultraviolet rays that only travel in a straight line and disinfect. The 254nm ultraviolet germicidal lamp kills bacteria by irradiating the DNA of microorganisms. The wavelength of 250nm-260m can play a good bactericidal effect. This wavelength range can destroy its chromosome.

  2. Different safety factors. The ozone produced by the 185nm ultraviolet germicidal lamp can strongly stimulate the human respiratory tract, causing sore throat, chest tightness, cough, bronchitis and emphysema. Prolonged exposure to ozone is bad for your body. The 254nm ultraviolet germicidal lamp will not cause harm to the human body as long as the lamp is turned off.

Since the germicidal lamp has been used for a long time, the light source will decay, so the intensity of the germicidal lamp needs to be detected regularly. The 254nm UV light meter is specially used to test the intensity of germicidal lamps. The state has the following regulations for the detection of germicidal lamps:

  • Only 5 minutes after turning on the UV lamp can the UV intensity of the lamp be measured more stably.

  • The instrument is placed in a vertical position 1m below the UV lamp for measurement.

  • The new ordinary 30W straight tube type ultraviolet lamp is qualified if its irradiation intensity is greater than 100uW / cm².

  • In use, the irradiation intensity of the ultraviolet lamp must be greater than 70uW / cm² to be qualified.

  • The peak wavelength of the UV germicidal lamp is 253.7nm. Only UVC lamps with this wavelength (UVC) have germicidal function.

  • UV lamps of different power have different irradiation ratings.

UV light meter

Linshang Technology has developed a special UV light meter-LS126C for 254nm germicidal lamps. The LS126C UV light meter is in accordance with the WST 367-2012 Medical Institution Disinfection Technical Specification. The 1-meter test hook is distributed to ensure full compliance with the test standards. The LS126C UV light meter also has a Bluetooth data transmission function, which can be used to monitor the intensity of the germicidal lamp in real time from a certain distance after being connected with the mobile phone APP. The bluetooth app help the users to avoid ultraviolet burns during the test. For more information about 254nm UV light meter LS126C, please contact Linshang engineer at sales21@linshangtech.com! Our engineers will answer your questions.

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