I need to measure microamper current with low noise

[metceyn]

How can i measure AC and DC microampere current with low noise. Is there any method for this?

[evb]

Adafruit for example, has something : https://www.adafruit.com/product/882

A decent multimeter will also measure in the µA range...

[boanjo]

I have both the uCurrent gold as suggested by @evb and also the "current ranger" https://lowpowerlab.com/shop/product/152 which is my first choice. It has a small display which makes it easier to use. But both are great products based on the same ideas from Evblog. Then to measure transient current you can hook up an oscilloscope to the output of any of the two.