A thermoelectric cooled, purge-and-trap device (TEC) has been developed to enhance the utility of fiber optic VOC sensors. This simple device consists of a thin copper radiator sandwiched between two thermoelectric coolers. Two water-cooled, copper heat sinks are used to maintain the hot side surfaces of the thermoelectric coolers at 5 degrees C, allowing internal surface temperatures of the radiator to be controlled between 5 degrees C to $MIN@43 degrees C. This paper describes the use of the TEC with a reversible, fiber optic, carbon tetrachloride sensor. The sensor by itself has a detection limit of around 1,000 ppmv carbon tetrachloride in nitrogen. When the sensor is used with the TEC, vapor phase concentrations down to 100 ppmv can be measured.
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机译：已经开发出热电冷却，吹扫和捕集装置（TEC）以增强光纤VOC传感器的效用。这种简单的装置包括薄的铜散热器，夹在两个热电冷却器之间。两种水冷的铜散热器用于在5摄氏度下保持热电冷却器的热侧表面，允许散热器的内表面温度控制在5℃至$ MIN @ 43摄氏度之间。本文描述了使用TEC与可逆，光纤，四氯化碳传感器。传感器本身的检出限约为1,000ppmV碳四氯化碳。当传感器与TEC一起使用时，可以测量低至100ppmV的气相浓度。
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