Just an out-of-the-box thought. The range you cited happens to be the working range of a typical LED. If you have the voltage to light an LED, you could just use LED brightness as your current sense. Probably not what you’re looking for, just a thought.Hi all!
I want to "sense" really low currents in a 3 Phase system (Currents as low as 2-10mA). I want to be able to also monitor using a data logger. Not sure how to go about this?
Do they have current transducers this low?Not something that is easy to do, depending on how much you want to spend you could considered buying three of these, dismantling them to find an internal voltage proportional to the measured current and feed that to your logger (x3).
Of course, buy one first to investigate its performance and that you can locate a pick-off voltage to feed into your logger, which might not be easy on surface mount components.
But for under £105 you could have the front end of your 3 phase current monitoring system with a resolution down to 1mA (which I reckon would be hard to beat).
Approximately 10mA. What CT could I use? Model?A proper sized current transformer (three needed) should be able to sense that current.
You can wrap more turns of the AC power through the transformer core to increase its sensitivity (proportional to the number of turns).
What is the the maximum current of the system?
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