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3.5 DIGIT LCD PANEL METER, 20 V SCALE

CAT # PM-21 (6 Reviews) Write a Review

$9.00 each
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Product Description
20 volt scale. LCD display size: 1.84" x 0.78". Character height: 0.5". Bezel dimensions: 2.65" x 1.60". Flat-black bezel and body are one unit. Snap-mounts from front into 2.12" x 1.50" chassis cutout. 9 Vdc operation. Auto polarity indication.
WARNING: May cause cancer or reproductive harm.
California Prop. 65
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Customer Reviews (6 Reviews)

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Great Inexpensive meter

Reviewer: from Waukegan, Illinois

I needed to monitor the batteries in the RV, one for the motor battery and one for the coach battery. These were perfect and to keep drain to a minimum, I used a separate 9v battery to power the meters-perfect.
Actually was priceless in finding an electrical problem involving the battery and now to watch charge level when the solar panel is maintaining the battery while the coach sits. Connections are not too bad, I would say almost anyone can do it as long as you are not changing voltage resistors. The only thing that would make the meter better would be back lit displays.... Thumbs up!!

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Great for monitoring a 12 volt battery

Reviewer: from Southern California, USA

I purchased this meter to monitor the status of our 12 volt trailer battery/solar charging system. It works fine, although the hundredths digit tends to jump around alot, +/- 0.03volts (the reading is good and steady on my Fluke DVM). It needs a separate 8-12 volt supply for operation and draws 1mA. It's the same meter as PM-200 but with added resistors to convert it to 20 volts. I think it's a good bargain.

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Isolated PS for this meter - DC-32

Reviewer: from Nevada City, CA

See my app note for the DC-32 on creating a power supply for this meter if you are not using a battery.

Meters in this series are stable and good quality display .

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Sweet Meter

Reviewer: from MARYSVILLE, MI USA

Very nice meter. Looks great. Has nice readout.

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Good Meter...with a few issues

Reviewer: from Parsippany, NJ

I bought this meter because of it's voltage range, 0-20V. The hundredths of a volt digit jumps around (+/- 0.03V) and adding a cap at the input did not fix the bobble. Also, I had to use the onboard trim pot to get it to read the same as my DMM. The PM-21 was about one volt low compared to the Velleman DVM850. An operating manual and troubleshooting guide would also be useful.

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