Recently a lot of customer calls to buy laser granulometer, but don't know what indicators need to be considered? Jinan micro-nano small make up today is to introduce for everybody.
If you are going to buy a laser particle size instrument you want to refer to the following five:
First, the measuring range: can be divided into nanometer level and micro level
Second, test methods: dry method and wet method
Third, test principle: mie scattering and dynamic light scattering
Fourth, the laser: generally divided into semiconductor laser and HE - NE gas laser, semiconductor laser advantage without preheating before use, service life is long, the disadvantage is that light is not stable, light may not round, gas laser should be preheated before use, summer in winter in about 30 minutes, 15 minutes advantage is light round, light stability.
Fifth, the number of detector, also called measurement channels, different particle size the ring number of detectors is different also, the precision of the measurement is different also, suggest use the ring number, large arrangement Angle