| 摘要 |
<p>A miniaturized, portable sensor (10) having increased sensitivity is provided for selectively sensing the presence of halogenated gases, particularly HFC's, within an atmosphere. The apparatus includes a ceramic element (11) containing either a mixture of potassium silicate and either aluminum oxide or silicon dioxide which react with ions of the halogenated gas when the two are brought together forming a depletion layer on and within the ceramic (11). The sensor (10) is formed with two electrodes (14, 16) on opposite sides of the ceramic (11) having terminals connected into a circuit for detecting a potential difference across the depletion layer. Means (22) are provided for detecting the potential differences and for producing a discernable signal in response thereto.</p> |
