LAST MONTH'S ISA EXPO IN HOUSTON clearly showed how much attention wireless technology is attracting.Wireless devices,however,still are relatively rare at most chemical plants because a number of issues are hampering acceptance.Some potential users worry about a lack of standards(CP,June,p.7),while security concerns give others pause.Another widespread concern centers on the powering of the devices.Many people seem most interested in devices untethered by any wires,including those for power,even if a source is readily accessible.So battery life can be an issue.
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