Tool/software:
Hi,
We are in search of humidity sensor for a development of a laboratory device. We came across the humidity and temperature sensor HDC3020QDEFRQ1. We would like to know whether the sensor is capable to work in the hydrogen peroxide vapor environment? Will it damage or the reading will change for the hydrogen peroxide vapor environment?. The concentration of the hydrogen peroxide will be 70% hydrogen peroxide vapor and 30% water vapor in it.
Hi Amal,
We do have some results on testing HDC3020 in a hydrogen peroxide environment, although in less time and concentration than your application. In our HDC302x Silicon Users Guide, we show the effects of some common chemicals on the HDC3020. Here are the results for hydrogen peroxide:
The hydrogen peroxide is the gray curve, and we do not observe much if any RH gain or offset shift. Nor did we have any indication that exposing the HDC3020 to hydrogen peroxide was damaging to the package or overall functionality of the sensor. However, your application will have a much higher concentration and continuous exposure than these tests which were done in short bursts. So I would expect you will observe a negative gain shift over time from the constant exposure (by negative gain shift, I mean that as RH increases, RH error becomes more negative and out of spec). You will likely have to experiment a little with your specific gas levels to see how much the HDC3020 is affected.
Regards
-Alex Thompson
