Products > Test Equipment
Is there a DC clamp meter with amp-hour counting?
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isso:
Hi, I often need to check a capacity of a battery during charge or discharge. It's very convenient to use a clamp meter to measure the DC current, because there's no need to break the existing wiring. But to measure the amount of energy I need to multiply the DC current by the time passed, and if the DC current changes over time, this becomes a hard task. Is there a clamp meter model that can do the calculation of amp-hours automatically?
Someone:
"coulomb counter"

But if it's attached to monitor continuously what's the value in a clamp? All the normal coulomb counters I'm familiar with use a current shunt resistor.
isso:
Yes it's "coulomb counter", thank you for suggesting the correct term. Sorry I didn't get your question, I basically need to count the amount of energy flowing through a wire in some period of time without modifying the circuit (i.e. shunts don't work for me). So I thought a clamp meter with a counter (integration option) would work the best for me.
ledtester:
This product is described as a:

"Charge-Discharge Monitor, DROK 0-90V 100A DC Ammeter Voltmeter, Battery Capacity Amp-Hour Watt-Hour Power Time Multimeter, LCD Display Digital Voltage Current AH WH Watt Meter Tester with Hall Sensor"

https://www.amazon.com/Charge-Discharge-DROK-Voltmeter-Watt-Hour-Multimeter/dp/B07YWVCBRN/

On Aliexpress the search terms "DC power meter hall" seem to come up with what you're looking for:

https://www.aliexpress.us/w/wholesale-dc-power-meter-hall.html?spm=a2g0o.detail.search.0

also "DC coulomb meter hall":

https://www.aliexpress.us/w/wholesale-dc-coulomb-meter-hall.html?spm=a2g0o.productlist.search.0
isso:
Thank you very much for the links, I have a couple of those devices, there are a few problems with them - they aren't technically clamps (I need to clamp to the existing wiring), their accuracy is quite bad, and they aren't really hand tools, i.e. they need housing, power supply etc.

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