Electronics > Beginners
Measure contactless dc current 0-100mA
Vindhyachal.takniki:
Looks like this solves the purpose : https://www.lem.com/en/ctsr-03p
1. its contactless
2. can measure -300mA to +300mA with 1.9% accuracy.
can connect 16 bit adc and oversample it for better measurement.
do anyone else ever used their product, its reliablity?
Marco:
You said you could not disconnect wire or break it ... that is a closed loop sensor.
BravoV:
--- Quote from: Marco on February 09, 2020, 02:17:50 pm ---You said you could not disconnect wire or break it ... that is a closed loop sensor.
--- End quote ---
Unless you are a true magician ... :-DD
pwlps:
--- Quote from: Vindhyachal.takniki on February 01, 2020, 06:32:26 am ---Is there any sensor available to measure dc current from 0-100mA contactless?
Contactless is the problem, looked for some sensor half effect but they are for very high currents only
--- End quote ---
A DCCT ?
DCCTs were developed a long time ago at CERN to replace current shunts for high precision magnet current monitoring, now some commercial magnet power supplies use them too. These are much more stable/precise (down to ppm range) than Hall sensors so that even with a relatively high current device you should be able to get a reasonable resolution. They aren't really cheap though (but I saw some reasonably priced on ebay).
I also found this project:
https://hackaday.io/project/329-dc-current-transformer
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