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Rossington K.,Contec Inc
Cleanroom Technology

The latest advancements in chlorine disinfection are reviewed. Chlorine first began to be used as a disinfectant in the late 1800s to early 1900s. Calcium hypochlorite systems tend to be used for small water treatment plants and well systems. Calcium hypochlorite has a very strong oxidizing potential and consequently is very dangerous to store and use. Chlorine is added to water in one of three forms, elemental chlorine (chlorine gas), sodium hypochlorite solution or calcium hypochlorite powder (high-test hypochlorite). Chlorine gas reacts rapidly with water to form two compounds, hypochlorous acid and hydrochloric acid. Contec ProChlor is a latest product based on chlorine, which has low pH and available chlorine concentration. The product also carries no hazard and thus requires no specialized PPE or disposal consideration. It is non-corrosive and current testing shows good compatibility with cleanroom materials. Although not residue-free, because a small amount of residual calcium salt will remain, it is free-rinsing and present at very low levels. Source

Livsey A.,Contec Inc
Animal Technology and Welfare

The objective of this study was to determine the rate of kill of Syphacia species eggs when treated with, an aqueous ready-to-use disinfectant, 2000 ppm hypochlorous acid. The Syphacia eggs were collected from the perianal area of rats (Flynn, 1973). The host animals were either Han Wistar or Sprague Dawley rats. The collected eggs were immersed in the hypochlorous acid for a range of exposure times then placed into a hatching medium and incubated to allow determination of viability compared to untreated control eggs. The results showed that following exposure of the pinworm eggs to the hypochlorous acid, 95% kill was achieved in 10 minutes. Source

Rossington K.,Contec Inc
Cleanroom Technology

The views of Karen Rossington on some of the factors that influence effective wiping when using presaturated wipes as an efficient cleaning tool are presented. Studies have revealed that wiping is the most effective method of cleanroom surface cleaning. The ability of a wipe to retain and remove particle or fiber depends on the structure of the wipe and the size of the contaminant. Some manufacturers have developed proprietary surface treatments for the dry wipes that enhance particle removal and retention. The use of a wipe presaturated with a low surface tension fluid, such as alcohol, helps to lower the surface tension of this binding force, facilitating the removal of the particle. Source

Rossington K.,Contec Inc
Cleanroom Technology

Peter K. Kang and David Hildreth developed a new robust test method to prove that the wipe was truly achieving the desired level of particulate pick-up. In the test two different types of standard test dust were used, AC Fine Test Dust and Carbon Black Particles. Suspensions of both particles were made up in deionized (DI) water. An ultrasonic bath was used to ensure the particle aggregates were broken up as much as possible. The wipe was then removed and added to a jar containing clean DI water where the particle count had already been measured. The weight of the wet wipe was recorded and the jar with the wipe in it was shaken on the biaxial shaker for 5 minutes. The wipe was then removed and discarded. The particle concentration in both jars was recorded. The total number of particles that were generated were equal to the initial number of particles in the suspension, the number of particles released from the wipe during biaxial shading, and the number of particles created from the break-up of larger aggregates. Source

Contec Llc | Date: 2014-02-26

A system and method for updating IR signal information remotely for control devices are disclosed.

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