High impedance sensors - what should I consider?
Some key attributes of high impedance sensors, they don't self-load and are inherently low power. When designing signal conditioning for these types of sensors it is important to take into consideration some key attributes to ensure the highest precision measurement can be made, this requires that leakage currents, input bias currents, and static offset voltage errors are kept to a minimum. The input impedance of the signal conditioning circuit should be maximized as well to avoid attenuation of the sensor signal. Take a look at this article on analog.com that discusses signal conditioning for high impedance sensors, highlighted are examples of high impedance sensors and discusses the types of conditioning circuits that can be used to buffer and protect these high impedance circuits.