DIYMORE 5PCS 0.28" Digital Voltmeter Ammeter - DC 100V 10A Voltage and Current Meter

Mauricio Chuaire: Lo utilice para una fuente de laboratorio y funcionó muy bien. Es más exacto en el rango de más allá de los 20 voltios, en la parte baja tiene una tolerancia más alta el. amperimetro también me funcionó muy bien.

United States on Dec 04, 2023

Y.S.CA: Refund requested.

Canada on Aug 26, 2023

Dave: Items do not match images shown in the description. The shunt resistor is not an alloy wire. There is no trim pot for adjusting the current measurement. The current readings are always at least 20-30% higher than expected. The voltage reading only shows 2 digits instead of 3 when the measured value is less than 10 volts.

Canada on Aug 07, 2023

BKBK: So I buy these for work and for my own pet projects at home.
They work great, and for the price, are a great bargain.
Just pay attention to the wiring. They colors of the heavy wires are misleading if your barging ahead and assuming, and not paying strict attention to the wiring instructions.

None of my own shipments have every been problematic as far as the meters working.

This last shipment I ordered for work, of 2 packs of 5, were problematic, and the meters did not look like all the others.
In the past, the others were slightly different. But this set was very different looking.

Orders in Jan 2022 and earlier were great.
Order in late Feb 2023 was great.
Order in Jan 2023, had this bad batch, which looked very different.

That Feb 2023 bad batch, all did not work, and several smoked. The one I had here for testing, when powered with a lab supply with 12vdc, it drew 300ma, no display, and climbed quickly to 700ma, and I turned off the power. That meter was on it's way to releasing the magic smoke.

So look at the pictures. the one that says Bad (red text), was from the bad batch, all look the same in the batch. Comparatively to a...

United States on Mar 16, 2023

windsurfer: Out of five meters, two of them showed accurate results, the other three showed smaller current values when compared to Fluke ammeter. Perhaps there is an adjustment pot on these meters somewhere on the PCB, but right out of the box three were not up to the spec. I chose the one closest to my multimeter readings. The display is good and well lit to be able to track both the voltage and current values.
Update: The seller reached me about calibrating voltage and current readings on these meters. The meters have two calibration potentiometer screws, one for voltage and one for current. So, you need to adjust them against a standard if your meter is off. So, I am upgrading the product to five stars.

United States on Dec 12, 2022

Bruce K.: These worked perfectly for my project.
One of the five units didn’t power on.
After contacting the seller and explaining my troubleshooting they offered a refund for the bad unit and that credit was applied to my Amazon account the same day.
Good product and customer support when it was needed.

United States on Oct 30, 2022

Laynae: Not a bad little meter, especially for the price. Fairly accurate over the 8-24V 40-400mA range that I'm using them for. The Voltage and Current adjustments on the back are a bit finicky, and the current won't display until it reaches 40mA, but I'm pleased with the overall quality. I'm sure I'll be buying several more before my project is complete.

United States on Jul 04, 2022