In this study, the performances of H2S, NH3, and HCl sensors for real-time monitoring in small emission facilities (4, 5 grades in Korea) were evaluated at high concentration conditions of those gases. And the proper approach for the collection of reliable measurement data by sensors was suggested through finding out the effect on sensor performances according to changes in temperature and humidity (relative humidity, RH) settings. In addition, an assessment on sensor data correction considering the effects produced by environmental settings was conducted. The effects were tested in four different conditions of temperature and humidity. The sensor performances (reproducibility, precision, lower detection limit (LDL), and linearity) were good for all three sensors. The intercept (ADC0) values for all three sensors were good for the changes of temperature and humidity conditions. The variation in the slope value of the NH3 sensor showed the highest value, and this was followed by the HCl, H2S sensors. The results of this study can be helpful for data collection by enabling the more reliable and precise measurements of concentrations measured by sensors.

1. 서 론
2. 연구 방법
    2.1 전기화학식 가스센서의 원리 및 감지특성
    2.2 전기화학식 가스센서의 성능평가 방법
3. 연구결과 및 고찰
    3.1 가스센서의 성능평가
    3.2 온·습도 조건에 따른 가스센서의 변화특성
    3.3 온·습도 변화에 대한 농도 보정 방법
4. 결 론

• 이춘상(안양대학교 환경공학과) | Chun-Sang Lee (Department of Environmental Engineering, Anyang University)
• 김경찬(안양대학교 환경공학과) | Kyoung-Chan Kim (Department of Environmental Engineering, Anyang University)
• 최다영(안양대학교 환경공학과) | Da-Yeong Choi (Department of Environmental Engineering, Anyang University)
• 김주연(안양대학교 환경공학과) | Ju-Yeon Kim (Department of Environmental Engineering, Anyang University)
• 주흥수(안양대학교 환경공학과) | Hung-Soo Joo (Department of Environmental Engineering, Anyang University)
• 한진석(안양대학교 환경공학과) | Jin-Seok Han (Department of Environmental Engineering, Anyang University) Corresponding author