0.28 inch Digital Voltmeter Ammeter DC 100V 50A LED Amp Volt Meter With Shunt

(6 customer reviews)

In stock

SKU: 43398
  1. Operating Voltage: 5V DC
  2. Current Consumption: <60mA
  3. Testing Voltage: 0-100V
  4. Testing Current: 1-50A
  5. Easy to read even in dim light


(inc GST)

₹ 592.37 (+18% GST extra)

In stock

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Category: Ammeter and Voltmeter
Tags: LED Display, Voltmeter, Ammeter, Shunt Resistor

This is 0.28-inch Digital Voltmeter Ammeter DC 100V 50A LED Amp Volt Meter With Shunt. This meter will measure up to 100 VDC with a 0.1-volt resolution.

One thing to note is, this meter has 2 wiring harnesses. One harness is to provide power for the meters, that’s the 2 poles with a RED and a BLACK lead. Small size, portable, the magnitudes of voltage and current are displayed on the same screen at the same time.

This can be supplied anywhere from 6 volts DC up to 30 VDC. This is a separate power supply that is isolated from the source, it is possible to use the same supply but it seems to affect the amp meter reading. The 3 wire harness is used for a ground that connects directly to the battery or supply ground of the load.

Note: There are two different wiring variants (i.e. yellow wire and Green wire ) with the same working functionality is available which will be shipped randomly. Use the followings guidelines according to your version.

CASE 1: Onboard Wiring Instructions for “Yellow” Wire connection

1. Thin Red Wire (VCC): positive pole of power supply input (4.5-30V)
(Note: if the measuring signal is less than 30V and the power is adequate, can be the power supply of module)

2. Thin Black Wire (GND): the negative pole of power supply input (4.5-30V, common ground with measuring signal)

3. Green Wire (VIN): positive pole of measuring signal input (0-100V)

4. Thick Red Wire (I+): positive pole of current input (series connect on the power supply cathode)

5. Thick Black Wire (I-): the negative pole of current input (series connect on the power supply cathode)

Connection Diagram:

Note: If the input voltage is more than 5V then please use the buck converter.

CASE 2: Onboard Wiring Instructions for “Green” Wire connection

(The current range of 10A requires the external shunt connection process)

1. Connect the lines which are not connected well, and do not touch other places.

2. The shunt is connected to the negative pole of the measuring system (the shunt itself does not distinguish the direction, and the connection is fixed to the two large screw holes in the distributor.

3. According to the current direction, the green line (+) and the black line (-) of the three lines are respectively screwed on the two small screws of the shunt.

4. Connect the red line of the three lines to the positive pole of the measuring system.

5. The power supply line in the two lines is connected to the appropriate power supply (and the voltage between the black lines in the three lines. It is suggested to be connected to the 12V, at the same time, the electric power black lines in the two lines are wrapped with insulating tape, so do not encounter other places, so as not to cause a short circuit).

6. The above 1-5 steps are suitable for the use of common ground; for independent power supply occasions, the red and black lines of power supply in two lines are respectively connected to both sides of the positive and negative poles of the power supply (the power supply voltage <28V, suggested to be about 12V).

Connection Diagrams:

circuit diagram

Features :

  1. It measures up to 100V and 50A DC.
  2. Very handy and small in size.
  3. It requires a power supply of 5V.
  4. 100% Brand new and high quality.

Package Includes:

1 x Dual LED Panel Ampere Voltage Meter.

1 x Current Shunt.




Red and Blue

Operating Voltage (VDC)


Current Consumption (mA)


Testing Voltage (V)

0 to 100

Testing Current (A)

1 to 50

Refresh Speed (ms)

500 (one time)

Operating Temperature (°C)

-10 to 60

Height (mm)


Length (mm)


Width (mm)


Shunt Resistor Dimensions (mm)

120x25x20 (LxWxH)

Weight (gm)


Shipment Weight

0.018 kg

Shipment Dimensions

13 × 5 × 4 cm

15 Days Warranty

This item is covered with a standard warranty of 15 days from the time of delivery against manufacturing defects only. This warranty is given for the benefit of Robu customers from any kind of manufacturing defects.  Reimbursement or replacement will be done against manufacturing defects.

What voids warranty:

If the product is subject to misuse, tampering, static discharge, accident, water or fire damage, use of chemicals & soldered or altered in any way.

Based on 6 reviews

4.0 overall

Add a review

  1. haleshakv (verified owner)

    volt meter is OK but ammeter shows wrong and calibration pre set completely failed.😑


  2. orangecafe54 (verified owner)

    good product, fast delivery


  3. hotelvikram (verified owner)

    Good !!


  4. Allen Antony (verified owner)

    The product was shipped immediately and arrived on time. The item works as published and the built quality is decent.

    Allen Antony

  5. Alok Verma (verified owner)

    Nice product

    Alok Verma

  6. Graiden (verified owner)

    Good Product however it does not have short circuit protection.


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