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Current Probe for GW121?
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mtgstuber:
Hi folks,
    I just picked up a GW121, primarily for the logging capabilities.  I considered the Keysight 12xx series, but there didn't seem to be a way to do interval logging without connecting a phone or computer.  I considered the Fluke 287/289, but didn't really want to spend that much, given that I have a series of other meters.  I liked the open nature of the GW121.
    I'm interested in picking up a current clamp / current probe for the GW121.  I don't really need high currents.  I have two other clamp meters, but they don't do data logging. 
    Any thoughts on a clamp probe that I could use with the GW121?   I'm primarily interested in being able to log currents in household and automobile applications.  30 or 40 A is fine for an upper limit -- in fact it's preferred, as I'm interested in more low end detection capability.
Kleinstein:
For AC there are relatively cheap external current clamps that give out a proportional voltage. One can also use some kind of DIY or commercial current transformer.

For DC things are more complicated as a DC current clamp needs an active circuit and can be tricky with small currents as an external magentic field can effect the readings.
BILLPOD:
The clamp accessory that pairs with the new Uni-T UT117c DMM also works with my 121GW, on the mV range.   Good to 400A AC, (no DC).
It is model # UT-CS06A and is only around $20 USD. :popcorn:
mendip_discovery:
I have yet to find a sensible clamp meter. I might get some shunts but they are a bit of a pain when working in a vehicle and all you want to do is log the current as you change the rpm.

I would say I am looking at <200A.

I did buy an amazon cheap thing but I have yet to get repeatable numbers with it.
bicycleguy:
A Micsig CP2100A works great using a bnc to plug adapter and is even better with an oscilloscope for when you need to see what's really going on.
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