[time-nuts] QCM

[Bernd T-Online]

Hi Ulrich,

Ulrich Bangert wrote:
> Has anyone of you personal experience
> with QCMs (Quarz Crystal Microbalances) and give me a recommendation on 
> a) what surface coating is suggested if the aim is to measure small
> amounts of humidity in clean air
You should use gold coated QCM

> b) where such crystals may be supplied from in small quantities
through my company (AXTAL - www.axtal.com)

> c) or if anyone is aware of a ready to go humidity sensor based on QCM
> technology
There are several test systems on the market, but none of them is really 
low cost.

Best regards

Bernd Neubig
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