An enzymatic toxic gas sensor 10 having a plurality of parallel planar surfaces and a buffered electrolyte reservoir 44. The buffered electrolyte is conveyed by means of diffusion to a substrate 28 to dissolve the substrate. The substrate diffuses to an immobilized enzyme where it is hydrolyzed if the enzyme is active. An electrochemical cell continuously monitors the hydrolyzed substrate concentration which is an indication of the enzymatic activity and presence of toxic gas. A circuit means responds to the current output of the electrochemical cell to indicate the presence or absence of a toxic gas. The shelf life of the sensor is extended by means of a separator for maintaining the enzyme dry and inactive. The enzyme in the preferred embodiment is acetylcholinesterase (AcHe).
酶法有毒气体传感器 10 具有多个平行平面和一个缓冲电解质贮槽 44。缓冲电解液通过扩散输送到底物 28,使底物溶解。底物扩散到固定酶处,如果酶具有活性,底物就会被
水解。电
化学电池连续监测
水解的底物浓度,这表明酶的活性和有毒气体的存在。电路装置会对电
化学电池的电流输出做出反应,以显示是否存在有毒气体。传感器的保质期可通过一个保持酶干燥和非活性的分离器来延长。优选实施方案中的酶是
乙酰胆碱酯酶(AcHe)。