摘要
采用发光二极管、光导纤维和硅光电二级管检测器研制成可供环境水ｐＨ值和大气中ＳＯ２、ＮＨ３检测的光纤多参数传感系统．仪器对ｐＨ值的响应可低达００１ｐＨ，对水中ＮＨ４＋的检测限为２×１０－６ｍｏｌ／Ｌ，ＳＯ３２－的检测限为２×１０－４ｍｏｌ／Ｌ；仪器体积小，可用电池供电、便于野外监测，检测准确、稳定，成本低廉．
A new optical fiber sensing system for pH in water,SO 2 and NH 3 in air monitoring was designed and developed.It consists of LED sources,optical fiber and silicon photodiode detector.The responsibility of the system for pH is 0 01 unit,the detective limits for NH 4 + in water is 2×10 -6 mol/L, and for SO 3 2- is 2×10 -4 mol/L.The system is compacts and can be powered with battery and used for filed monitoring.
出处
《环境科学学报》
CAS
CSCD
北大核心
1999年第2期200-204,共5页
Acta Scientiae Circumstantiae
关键词
光纤传感器
环境监测
传感器
仪器
optical fiber,sensor,photodiode,double beam compensation.
