QCM sensor electrodes for air monitor
As more and more customer use QCM air monitor from 2013, we have make many type of crystals for such use, such as 6MHz, 9MHz and 10MHz, but the most popular now is 9MHz, gold, silver, cooper electrodes the most popular.
There also some customer want to use 30MHz, but this high freqneucy not easy for mass production and it's too thin and fragile.
Some customer also use SiO2 and some others, but not so popular.
Just like the E-nose, air monitor base on quartz crystal microbalance will use more and more.