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The foreign matter keeps insideMany UV water sterilizer products basically apply the mixed gas by mercury vapor pressure with other abnormal metal types. If they fail to approach positive pole in time, the ions will collect on the tube surface. Such trace is left by repeat evaporation of mercury. Therefore, the coldest position or the place close to air condition machine will be with the trace of mercury pollution.Black spot on cold endAfter a short term of utility, UV water sterilizer will be with black spot on the edge. In every time of preheating process, the ions will easily attach on the tube surface to form black spots if there is excessive amount of bombardment.

Tube gets color changedIn the manufacturing process of UV water sterilizer, hydrogen elements will be kept due to incomplete heat baking and exhaust pumping crafts. It would be the mercury steam. And the change is normal. Other metals will be on the wall like dust. Such gas is put into the vacuum glass with infrared heat lamps. Such alloy will gather in the fluorescent powder to change the powder quality. Before the mercury gets completely evaporated, it would be with particle shape inside the tube. The reason is that: when the sterilizer tube gets thinner, the related power would turn bigger, filament will be longer, and the filament electrode will get closer to the tube wall. Such kind of gas will gather surrounding tea packaging company the filament and get evaporated when getting heated.

The gas will evaporate up through the tube surface and turn faded until disappear.Ring-shaped black circleAfter the long-time use, the metal halide of UV water sterilizer would be with a black ring. The mercury will also get mixed to deteriorate the quality and pollute the fluorescent powder and medical bulbs. It is with the feature to collect on the bottom position of tube. Such situation could get obvious on energy-saving tubes.3 Mercury is attached on the tube surfaceThe mercury in the UV water sterilizer will get condensed in coldness. In the transparent tube, such phenomenon is quite clear.

When UV water sterilizer gets longer time for use, the black spot will become bigger and bigger.2 Turning black by launching the deviceFor the new lamp tube or the one without long-time utility will not be used for a long time, black cloud will be created from the part of filament. That is caused by heavy ions from negative pole. During the launching process, sodium will be separated out from the glass tube and then combine with mercury to form mercury sodium alloy.