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	Museums The atmosphere in industrialised cities around the world contain Sulphur Dioxide, Nitrogen Oxide and Ozone. Museums and art galleries need to control these gases to prevent damage to their collections of paintings, documents, fabrics and metal objects. Particulate, temperature and humidity control are also equally important. Our dry scrubbing medias based on activated carbon and activated alumina offer complete control of the corrosive gases and will enable the highest world standards to be maintained. Various hardware configurations are available to suit. Normally chemical filter elements are incorporated into the main air handling units. Chemical filters should be provided in the fresh air make up and in the re-circulation streams. For smaller locations, free standing equipment can be used. Continuous monitoring of the atmosphere to determine corrosion levels is essential. Our corrosion monitor will continuously record and transmit temperature, humidity and corrosion levels.

Item	Description	Images	Further Info
Side Access Housings	Housings to be built into AHU. They contain chemical filter media in removable V shaped plastic trays. Filter elements are located in extruded aluminium tracking to eliminate bypass. Modules can be easily removed for media sampling and media replacement.
Free standing Units	Fully packaged units are available which also include fans pre and Hepa dust filters and instrumentation.
Deep Bed Scrubbers	More heavily contaminated atmospheres require heavy-duty scrubbers to clean the pressurisation air. The dry scrubbing media is contained in either horizontal or vertical beds in increments of typically 200 or 300mm depth.
Corrosion Coupons	Specially prepared coupons strips made from copper and gold are exposed in the museum atmosphere for typically 30 days. Corrosion levels are then measured in angstroms and the atmosphere can be classified. Cost effective method to monitor chemical filter performance.
Corrosion Monitors	Fully electronic device that continuously monitors the corrosion rate on gold, silver and copper coupons. Constant read out of level of corrosivity, temperature and relative humidity is provided.

Museums