Figure 5
From: Fast responsive, optical trace level ammonia sensor for environmental monitoring
Sensor and instrumentation characteristics of two-wavelength ratiometric referenced sensor. (a) Fluorescence emission spectra of sensor F at different ammonia concentrations; (b) spectral sensitivity for blue, green and red of the color camera’s RGB sensor (dotted lines) and used bandpass filters (grey areas); (c) over the period of 24 hours comparing illuminated sensors (red graph mean value of 2 sensor foils) and non-illuminated sensors (blue graph mean value of 4 sensor foils).