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i have bought several transducer for NDT test from some manufacturers, but before i tried them, i checked that the impedance between the positive and negative transducer just around 2 Ohm, and it didn't work with this circuit

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is it normal? because i have an old transducer worked properly and has around 3 MegaOhm impedance

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There exist multiple types of ultrasound transducers: Piezoelectric types need an AC voltage and they have high resistance. Magnetic types need an AC current and they have low resistance.

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  • \$\begingroup\$ Hello, thanks for the help, so it won't work with my pulser schematic right? I have tried to find pulser schematic for the magnetic transducer but i cannot find it \$\endgroup\$ – Zahi Azmi Sep 25 '18 at 23:26
  • \$\begingroup\$ Put your transducer between R2 and M1 in your schematic and change R2 value to maybe 100 Ohms. \$\endgroup\$ – Stefan Wyss Sep 26 '18 at 4:24

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