来自Apogee仪器的SQ-640光污染传感器可以检测从340到1040nm的bob体育竞技痕量光。下图显示了使用a的窗口中收集的数据
SQ-640 Light Pollution Sensor和
bob 体育网址
. The light pollution sensor was placed in the back of the room about 25 feet (8 m) from the door. To calibrate the sensor dark offset value, a dark scan was performed with the sensor covered. Photodetectors have small dark signals that need to be determined and removed from measured data in order to maximize accuracy. The µCache automatically adjusts for the dark offset once the dark scan has been performed. Data were then collected while the door was progressively closed, limiting incoming light from the adjoining hallway. With 20-point smoothing, the µCache logger and SQ-640-SS sensor were able to resolve light measurements as fine as 0.002 micromoles m
-2s
-1, or 2 nanomoles m
-2s
-1.