narrow-band pyrometer

例句：

1. 1. This instrument is used to measure the intensity of light in a narrow band.
   这个仪器用于测量光在窄波段的强度。
2. 2.The narrow-band radiometer was used to detect the presence of pollutants in the air.
   窄带辐射计被用来检测空气中污染物的存在。
3. 3. In scientific research, narrow-band radiometers are often used to measure the absorption of electromagnetic waves.
   在科学研究中，窄带辐射计通常用于测量电磁波的吸收。