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Five small rectangular blue LED voltmeter panels with three wires each

aFe Power Pack of 5 Three-Wire DC 0-30V Blue Digital Mini Voltmeter 0.36" LED Display Panel

SKU CH-MNPF-816MA

Pack of five calibratable three-wire DC 0–30 V mini voltmeters with 0.36" blue LED display and reverse-polarity protection

  • FeaturesBattery Powered, false
  • Height0.9 L x 0.55 W x 0.39 H inches
  • Width0.9 L x 0.55 W x 0.39 H inches
  • Length0.9 L x 0.55 W x 0.39 H inches
  • Weight0.01 pounds
  • TypeClamp
  • Three-wire design measures down to 0.00 V unlike two-wire units
  • Calibratable via rear screw for 0.01 V accuracy up to 9.99 V
  • Bright 0.36" blue LED display reads clearly in daylight
  • Reverse-polarity protection prevents burnout if wired backwards
  • Compact 23 x 15 x 10 mm fits tight dash or panel cut-outs

Pack of five three-wire voltmeters

This pack supplies five compact DC voltmeters designed for 12 V automotive and motorcycle electrical systems. Each unit uses a three-wire connection that enables measurement from 0.00 V to 30 V, unlike two-wire meters that cannot read below 3 V. The blue 0.36 inch LED display provides clear voltage readouts in low light. Installers monitoring battery state or accessory circuits will find the multi-unit pack convenient for multiple vehicles or test points.

Measurement range and accuracy limits

The meters operate on a DC 3 V to 30 V supply and measure the same 0 V to 30 V range. Accuracy is 0.01 V between 0.01 V and 9.99 V, then 0.1 V from 10.0 V to 30.0 V. A calibration screw on the rear allows fine adjustment. Voltages above 30 V will damage the device, and reverse polarity blanks the display without destroying the meter. The refresh rate is 300 ms per reading.

Capacity and headroom for typical uses

The three-wire design gives headroom down to 0.00 V, so parasitic draw and weak battery conditions remain visible. Below 10 V the display shows two decimal digits such as 5.32 V; above 10 V it shows one decimal digit such as 10.5 V. Operating temperature spans 14 °F to 149 °F, covering engine-bay environments. The pack does not suit systems exceeding 30 V or applications requiring current measurement.

Highlights

  • Three-wire design measures down to 0.00 V unlike two-wire units
  • Calibratable via rear screw for 0.01 V accuracy up to 9.99 V
  • Bright 0.36" blue LED display reads clearly in daylight
  • Reverse-polarity protection prevents burnout if wired backwards
  • Compact 23 x 15 x 10 mm fits tight dash or panel cut-outs

Specifications

BrandaFe Power
FeaturesBattery Powered, false
Height0.9 L x 0.55 W x 0.39 H inches
Width0.9 L x 0.55 W x 0.39 H inches
Length0.9 L x 0.55 W x 0.39 H inches
Weight0.01 pounds
TypeClamp

Questions about this item

Should I pick the three-wire or a two-wire version for monitoring a 12 V motorcycle battery?

The three-wire design measures from 0.00 V up to 30 V, so it reads a 12 V battery accurately even when voltage drops below 3 V, unlike two-wire meters.

What does the 0.01 V accuracy spec mean when I am watching a live 12 V system?

Below 10 V the meter shows two decimals such as 5.32 V; above 10 V it shows one decimal such as 10.5 V, giving you a clear view of small changes.

The meter is powered from the same circuit it measures — does the 3 V minimum operating voltage limit what I can monitor?

It needs at least 3 V to run, so it will not display anything if the measured line falls below that, but it covers the full 0.00–30 V range once powered.

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