Conductivity Tester Circuit and Simulation.

Conductivity Tester Circuit Diagram.

This circuit will detect resistance connected to Probe1 and Probe 2 Inputs. It will sound a 3.39 kHz tone on the speaker. It will automatically turn off when the probes are not used. Rtest 1k-Ohm resistor is the resistance being tested.

Download TINA TI Similation File