Low cost 10mV/mA DC current clamp probe/meter options?

[ImnoDave]

I've been looking around on the internet for such probes or meters, and i've come across a few. They all seem to cost 500$+.

https://www.ebay.com/itm/Kyoritsu-2500-DC-Milliamp-Process-Clamp-Meter-4-20mA-NEW/331107609259?_trkparms=aid%3D222007%26algo%3DSIM.MBE%26ao%3D2%26asc%3D56426%26meid%3Dcde56d05d15140079fad57e8e89b8866%26pid%3D100005%26rk%3D1%26rkt%3D12%26sd%3D263241859655%26itm%3D331107609259&_trksid=p2047675.c100005.m1851

https://www.aemc.com/products/current-probes/current-probe-k110

I also had a look at what aliexpress is offering, and they have a bunch of 1mV/1mA probes but non with higher sensitivities than that. Basically what I am looking for is a 100-200$ probe/meter (preferably probe) that would be able to measure 0-20mA. Does anybody know of any good options?

[schmitt trigger]

I have exactly that AEMC K110 probe.

If you notice, its output is via shrouded banana plugs, and thus intended for multimeter use. If you want to use it with a scope, you have to cut the shrouds to be able to attach a female banana to BNC adaptor.
However, because of the high gain, the probe has a lot of white noise. DMMs average it nicely, but on scopes you'll see a fat trace. You will require to enable averaging on your digi-scope to obtain a nice trace.

Overall it is a decent probe. There are not that many options for low current probes, unless you are planning to spend kilo dollars.

[ImnoDave]

Found this 2.5mV/mA DC probe:

https://www.aliexpress.com/item/Free-shipping-ETCR030D-DC-current-clamp-sensor-DC-leakage-current-the-DC-current-detection/32525941244.html?spm=2114.search0104.3.13.69035d652UwSvA&ws_ab_test=searchweb0_0,searchweb201602_8_10065_10068_319_10059_10884_317_10887_10696_321_322_453_10084_454_10083_10103_10618_10304_10307_10820_10301_10821_537_536_10902,searchweb201603_57,ppcSwitch_0&algo_expid=46ddff9c-dcd7-4284-9380-5c43e6bcec5f-2&algo_pvid=46ddff9c-dcd7-4284-9380-5c43e6bcec5f&transAbTest=ae803_4

Seems odd that it would have such a large hole.

[HighVoltage]

If you want to use it with a scope, you have to cut the shrouds to be able to attach a female banana to BNC adaptor.

If you use a MultiContact (MC) Adapter, you do not need to cut the shrouds.
See attachments

These current probes by Chauvin Arnoux are great but just too slow.
For pure DC signals, they are perfect!

[joeqsmith]

I assume from your post you need  a clamp but I was not sure if you needed to connect to a scope or what. 

The UT210E can read down to a mA but the BW is limited to a couple of KHz.   Not sure what you need.    I've shown where you can add a buffer to drive a scope.   Like most DC clamps, it drifts around a bit but for $30, it's pretty hard to beat.  I recently had a switch start to act up in one.  This was after about a year of service.   

If you just need higher sensitivity, you may be able to add a few turns.  I've modified a 210E to provide about 100KHz BW but to be honest, time would have been better spent on a new HP clamp for a few grand.   Still, a fun problem to try and tackle.