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How to amplify a nano ampere current?

Discussion in 'General Electronics Discussion' started by Sunkuru Sachin Kumar, Oct 9, 2017.

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  1. Sunkuru Sachin Kumar

    Sunkuru Sachin Kumar

    2
    0
    Oct 9, 2017
    Hello,

    I am working on sensors materials. We have developed a sensor (NO2 gas). As we are using it in circuits, we need to measure the resistance of the sensor in order to measure the sensing. Our applied voltage is +5V. So when the sensor is used in higher ppb gas measurement the current becomes very low (minimum: 10nA). We are getting a range of current from 0.5 mA (max) to 10 nA (min) for our sensor device. So the measurement of this low current of nA and calculating the resistance is the issue for us. How to calculate this range of resistance? or how to amplify the nA current so that we can easily calculate the resistance?
     
  2. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,501
    2,841
    Jan 21, 2010
    Google "nanoammeter circuit". There is a relatively simple circuit.
     
  3. Sunkuru Sachin Kumar

    Sunkuru Sachin Kumar

    2
    0
    Oct 9, 2017
    Thank you for the suggestion.
     
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