The Model 610 Atmospheric Corrosion Sensor monitors the corrosivity of the air in plant control rooms, in motor control centers, near exhaust stacks and in other environmental monitoring applications. It is available in two ranges with spans of 250Å and 2500Å. Since an accurate corrosion rate measurement can be obtained after loss of less than one percent of the total sensor span, day-to-day measurements can be made even in mild to moderately corrosive environments. The increasing use of electronic and computer equipment in the heart of industrial process plants necessitates the use of environmental systems to control atmospheres and protect sensitive equipment. These environmental systems regulate temperature and humidity and remove corrosive contaminants by the use of activated carbon filters. Loss of control of these parameters can cause corrosive deterioration of equipment. The compact, lightweight Model 610 Atmospheric Corrosion Sensor can be mounted in equipment racks, ventilation ducts or in other desired locations. Connection to monitoring instruments is through a separate adaptor cable (see Accessories). Activated carbon filters have a finite life for absorbing contaminates, depending on the quantity and frequency of contaminate exposure, which can vary greatly by location. In most operations, filters are routinely replaced once a year and replacement costs can vary from $5000 to $50,000. The Model 610 gives early indication of filter replacement without jeopardizing the safety of costly, sensitive equipment. Filter replacement is expensive and may be done prematurely without the use of a corrosion sensor. *1 Angstrom (Å) - 0.000,000,01 cm or 0.000,000,0004 inch