DROK 0.28" High Accuracy DC 0-33V/0-999.9mA-3A 12V Voltmeter Ammeter Voltage and Current Tester

HZ: I tried a similar-looking but cheaper volt and ammeter before and couldn't get an accurate reading for the current. This one was accurate right out of the box. The one thing that's a bit problematic with many of those is that the current needs to flow from the negative terminal of the load through the ammeter to the negative terminal of the power source - typically ground. So, you can't connect the load directly to the ground.

United States on Nov 04, 2023

Brad ClancyBrad Clancy: Bought this for a project that I’m in the process of prototyping. Needed to verify before use. Unfortunately, the display is hard to photograph! So reading don’t look correct.

It’s pretty much bang on in accuracy. Was in agreement with my bench top equipment.

Impressive precision on current meter. To have this resolution in mA up to 3A. This will work perfectly!!!

United States on Jul 09, 2023

R. S. Winsor: I really like this little meter. It can be operated for as little as ~42mW (3.3V at 14mA). The readings appear decently accurate to better than 1% on voltage and current, the refresh rate is nice and fast - but not too fast. Connections are easy. Only gripe is that I don't see a way to calibrate it (the only reason I dropped a star on accuracy), so I'm hoping it doesn't drift over time. The display is decently bright and it does a fast job of auto-ranging. Great value.

United States on Apr 17, 2023

M Watson: It was simple to hook up and it has some trim switches on the PC board for calibrating it. I haven't tried that yet. The display is bright enough and overall it works great. Just one minor complaint. I installed this in an aluminum enclosure and cut the rectangular opening for the meter with a Dremel tool cut-off wheel. I could not get the opening big enough for the display to fit past the plastic tangs without there being a gap between the opening and the bezel of the meter. The bezel needs to be a little wider to cover that gap. Would also be nice if it had a rubber gasket. I'm going to make another power supply with the same type of Hammond enclosure, but this time I'll remove or file down the retaining tabs/tangs to I can get a tighter fit. If it's loose, I'll hot glue it. These are reasonably priced and I've been a repeat purchaser of them.

United States on Oct 10, 2022

Talek: Used this to make a battery-powered bench power supply at work. Works great. Even measures a 4-20ma signal accurately. Worth noting, the red LEDs are hard to see in the sun when I take it into the field. But it’s south Texas, so can’t really knock it. Otherwise, FANTASTIC little module.

United States on Apr 20, 2021