Can someone tell me that is there any sensor available that can detect the acupoint on human body. i want to use it in my electro acupuncture project. Its basic function is to measure the body resistance, lower the body resistance on acupoints simply.
thanks.
I'm sorry, but I don't think that acupoints make sense.
The lowest skin resistance will be places that have perhaps more sweat or when you press the measuring pins a little harder.
Measuring the resistance can be done like measuring an LDR.
http://bildr.org/2012/11/photoresistor-arduino/
Or you could use an OpAmp to increase the sensitivity or impedance.
When you connect wires to the Arduino and touch those, the Arduino will get a lot of electrical noise. Partly from the mains 50Hz/60Hz and also static electricity. You can search for ECG and Arduino, those circuits have OpAmps and the signal is also filtered.
But than again, I'm the wrong person to ask. Many people use some kind of test equipment to measure vague things. Sometimes they actually do have working equipment but then they try to measure things that are impossible to measure, or doesn't exist, or they use the equipment in a wrong way. They still write a bill though.