conductivity

Hi everybody Can anybody advise please, I wish to measure nitrogen,potassium and phostrogen ideally in a leaf sample although soil would suffice. Do the above elements vary conductivity at different frequencies, I have seen a conductivity probe using stainless steel prongs that output npk data...

I have a conductivity kit from Atlas Scientific, but the ezo conductivity module is missing. I just connected the sensor probe to pin A0 on the Arduino Uno with the analogRead command in the source code. However, I'm still confused about the sensor output. Can I convert sensor output to...

Hi, I wonder how a maximum current rating for wires and busbars are calculated. How the maximum current rating for busbars are calculated, is there any standard for this. I used a copper busbar for my motor connection. but i need how much max current can be passed through it, is there any...