The market for chemical and biological agent detectors will almost double by 2007, according to a new analysis from Frost & Sullivan.The market research firm's report says that while this market generated revenues of $265 million in 2000, growing demand related to concern over chemical and biological terrorism will increase that market to $494 million by 2007.Demand will be highest for devices that can reliably detect chemicals and biological agents while limiting the number of false-positive readings, the firm said. Other critical specifications for the marketplace will be fast detection time and interoperability.