Any thoughts on this meter ? A shunt is not included, appears meant to be used w/o one, seeing the heavier wires for the amp meter. But is it possible that they would run 50 amps thru this little meter ?The wires don't look to be even 10ga, let alone 8 or 6ga to carry 50 amps. Any thoughts ?http://www.eachbuyer.com/led-digital-volt-amp-2-in-1-panel-meter-voltmeter-ammeter-100v-50a-blue-red-p238384.html?utm_source=criteo&utm_medium=cpc

I don't know I could get it hooked up-Thin red wire: power supply input anode (DC 4.5-30V)Thin black wire: power supply input cathode (DC 4.5-30V)Thick red wire: measure positive voltage input (voltage displayed between thick black wire and it is the voltage displayed on meter head.)Thick black: measure current flow (between thick black wire and thin black wire is communal land, it is connected.) (measure negative voltage input)Thick yellow wire: measure current inflow (connect with load cathode and the load positive pole connects with thick red wire.)Kind of confusing, in a machine translated way.Also- read the comments-all 8 units came with NO shunt resistor on board - CAN NOT measure Current. i assume all comments above are fake beware!

Normally a meter such as this would require a current shunt.

It is measuring the current through the bigger yellow (possibly black)/red wires. My guess is it can handle the current safely since the monitor lead length run is so short. However, the wires that connect to those thin wires will have to be sized correctly for 50 amps for distance.It is cheap, so buyer beware...

Seems like there could be voltage drop from a warmed up circuit board, if it ever really saw 50 amps. Maybe I don't need it.

I wouldn't chance it over 5 amps...I don't see any shunt on the circuit boardThe Turnigy meters that many of us are using, have an internal shunt good for 60 ampsI think Hobby King the sellers spec 130 amp peak, but this is surge value for the electric motors in RC aircraft, I believe it's 60 amp continuousI know mine is over 5 years old and still working

50 amp Volt/Amp Meter W/O EXT Shunt ? | Good Sam Community

16 Replies

NinerBikes
Explorer
Sep 18, 2014
I'd stock up on more than a few and liquidate them in Quartzsite this winter for a tidy profit.
Almot
Explorer III
Sep 18, 2014
ken white wrote:

I figured you wanted another low-cost toy to play with to see if it works or not...

:)

That's what I figured too - to play with. Finding something that "works" for a system, is not necessarily a part of the game :)...
GordonThree
Explorer
Sep 17, 2014
it's certainly possible to build a compact ammeter like this without need for an external shunt, using a solid-state hall effect sensor... but the wires pictured look woefully inadequate for the task

check out these cool chips:
http://www.allegromicro.com/en/Products/Current-Sensor-ICs.aspx
ken_white
Explorer
Sep 17, 2014
RJsfishin wrote:
It ain't even like I need it. I have 3 others, 2 w/ a shunt, and 1 w/o, but only 10 amps. It's probably a challenge,......to see how it works, and to see how much value for 5 bucks.

I figured you wanted another low-cost toy to play with to see if it works or not...

:)
RJsfishin
Explorer
Sep 17, 2014
It ain't even like I need it. I have 3 others, 2 w/ a shunt, and 1 w/o, but only 10 amps. It's probably a challenge,......to see how it works, and to see how much value for 5 bucks.
Almot
Explorer III
Sep 17, 2014
RJ, with the time and risk involved, why not just getting Turnigy? It's not that expensive.
Wayne_Dohnal
Explorer
Sep 17, 2014
I'm using a couple of DC combo volt/amp meters from ebay seller elite.element . They work well, ship with a shunt, and are accurate enough for me. He has a few different varieties you can browse through. Some of his meters require a dc-dc converter, some don't. The ones I'm using need the dc-dc converters.
JamesBr
Explorer
Sep 17, 2014
Apologies, wrong link. here is the DROK with Shunt for 16 bucks.
ken_white
Explorer
Sep 17, 2014
JamesBr wrote:
Volt Amp meter from other posts.

After seeing someones setup with this for monitoring both sides of his 50A, I been considering the same thing.

Your link is for an AC meter, and RJ's link is for a DC meter.

Just an FYI
JamesBr
Explorer
Sep 17, 2014
Volt Amp meter from other posts.

After seeing someones setup with this for monitoring both sides of his 50A, I been considering the same thing.