Electrochemical sensors e2v-memebrapor

I have to realize a circuit for this sensor:

from e2v site i found this circuit:
Microsoft OneDrive - Access files anywhere. Create docs with free Office Online. ( http://www.e2v.com/e2v/assets/File/sensors_datasheets/Electrochem/EC_Application_Note_AN2.pdf)
where i used a DAC for generate the V_set supply and the +2,5V. For the amplification i use a factor of 100k for read this signal with an ADC but the circuit isn't working and i have an output that vary very quickly from the output reference with an amplitude of +-400mV. Someone else has ever use this kind of sensors? what kind of circuit have you use? Thanks!

There is an email on the PDF so why not mail them?

Because if I ask them they answer me to buy this one:
http://www.membrapor.ch/sheet/Transmitter%20Compact.pdf :slight_smile:

ypkdani:
I have to realize a circuit for this sensor ... from e2v ...
Someone else has ever use this kind of sensors? what kind of circuit have you use?

I see some discussion about using very similar sensors from the same company (e2v) at

.
That discussion has a few links to circuit schematics -- will any of those schematics work for you?