To refrain from the complex construction and low sensitivity of the spectrophotometric detector

a high sensitive laser flow detector including laser source

attenuator

flow cell and photoelectric sensor is design.A new type of laser source which is reliable and whose wavelengh can be tuned in range of 500

8

00nm is designed through the optimization of different wavelength semiconductor laser diode.It is successfully used to determine the ppb-level silicate in boiler water and feedwater at power plants.The silicate detection limit measures up to 1.13μg/L.