NO2 probe 9238-Pb

mrlenoble · Post by **mrlenoble** » Thu Jul 21, 2016 3:40 pm

Hello support,

We have a WaspMote Plug&Sense Smart Environment with LoraWan, connected sensors are:
Temperature
NO2
Air Pressure

I have some questions about the NO2 sensorprobe 9238-Pb:
1. Which sensor is used in the 9238-Pb? I can not find it in de documentation.
2. In the examples the gain is set to 1 and the load resistor is set to 3, in the documentation of "Gases calibration.pdf" the recommended load resistor = 20. Which one should I use?

Kind Regards,

Marcel

Post by **libelium-dev** » Fri Jul 22, 2016 1:07 pm

Hi,

The sensor is the MICS-2714, you have more detailed information of this sensor at the guide at page 33,
http://www.libelium.com/downloads/docum ... rd_2.0.pdf

About the gain it depends of the concentration you are going to measure, changing the gain you will avoid the sensor get saturated.

Regards

mrlenoble · Post by **mrlenoble** » Fri Jul 22, 2016 1:48 pm

What about the load resistor ?

Post by **libelium-dev** » Mon Jul 25, 2016 8:26 am

The load resistor also depends of the concentration, the typical value is 20KOhm up to 100K.

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NO2 probe 9238-Pb

NO2 probe 9238-Pb

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