Actions
Forum Thread Details
  • Replies 1 reply
  • Subscribers 304 subscribers
  • Views 208 views
  • Users 0 members are here
Related
See a helpful answer?

Be sure to click 'more' and select 'suggest as answer'!

If you're the thread creator, be sure to click 'more' then 'Verify as Answer'!

conductivity/TDS/ppm meter

Former Member

i wanna conductivity/TDS/ppm meter which gives analog output in term of voltage. i wanna use this meter to measure a conductivity of liquid for my project.request you to let me inform if u have a circuit diagram for it. kindly need urgently.

thank you.

  • Dear Rinkal,

    To measure conductivity of liquid, you need two probes one of which will be used to inject a pulsed signal of about 100kHz and other will be used to sense the same injected signal and measure the amplitude of the same. To measure the amplitude you need an active rectifier (based on Op-Amp and four diodes configured as bridge and put in place of the feedback resistor of a traditional amplifier. Add another stage of amplifier for your gain requirement.

     

    Regards,

    Sujit