Electronics > Beginners

Measure contactless dc current 0-100mA

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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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