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White plug-in power meter with large backlit LCD display and NEMA 5-15 socket

aFe Power WMA02A Watt Meter 90-250V 3680W 16A

SKU CH-8DYN-S7KP4

Plug-in power meter measures voltage, current, wattage and energy up to 3680 W with cost calculation and 90-day data memory

  • Key featuresWMA02A Watt Meter, SURAIELEC, 3680 W, 250 V, ac, NiMh, true,
  • Overall height6.9088 L x 7.493 W x 14.097 H centimeters
  • Overall width6.9088 L x 7.493 W x 14.097 H centimeters
  • Overall length6.9088 L x 7.493 W x 14.097 H centimeters
  • Product weight0.168 kg
  • Product typeClamp
  • Measures watts, volts, amps, frequency and power factor with 2 % accuracy
  • 90 V to 250 V range handles 16 A and 3680 W maximum load
  • Backlit LCD gives clear readings in dark spaces
  • Rechargeable backup stores 90 days of cumulative data during outages
  • Compact form keeps lower outlet free and uses fire‑resistant housing

Plug-in Watt Meter for NEMA 5-15 Outlets

This aFe Power WMA02A meter plugs directly into a standard NEMA 5-15R wall outlet and accepts a NEMA 5-15P appliance plug. It measures voltage from 90 to 250 V, current up to 16 A, and power up to 3680 W. Homeowners and renters tracking appliance energy use will find it suited for monitoring refrigerators, heaters, or office equipment.

Simple Installation with One Compatibility Limit

Insert the meter into the upper outlet; the lower outlet remains accessible. Press the reset button to zero all accumulated data. The built-in rechargeable battery retains readings for up to 90 days during power loss. The unit does not work with AC inverters or solar panel inverters, and it requires a separate adapter for any plug type other than NEMA 5-15P.

Verify Outlet Type and Load Before Buying

Confirm the installation location uses a NEMA 5-15R receptacle and that the appliance draws no more than 16 A. The overload alarm can be set between 680 W and 3680 W. Accuracy is rated at 2 % with resolutions of 0.1 W, 0.1 V, 0.001 A, and 0.001 kWh. Ensure the local supply frequency falls within 47 to 63 Hz.

How it compares

Measured against everything we stock in Multimeters & Electrical Testers, at today’s prices. Recalculated every night.

Price $20.99
Cheaper than about 77% of the 971 comparable items (median $30.99).

Specifications

Product
Brand nameaFe Power
Product typeClamp
Size & build
Overall height6.9088 L x 7.493 W x 14.097 H centimeters
Overall width6.9088 L x 7.493 W x 14.097 H centimeters
Overall length6.9088 L x 7.493 W x 14.097 H centimeters
Product weight0.168 kg

Questions about this item

How do I verify the aFe Power WMA02A is measuring correctly after I plug it in?

Check that the backlit LCD shows instantaneous readings for watts, amps, voltage, frequency and power factor; the display should update in real time when the connected load draws power.

What comes with the meter and what must I supply separately?

The unit includes the plug-in watt meter with built-in rechargeable battery backup for 90-day data retention; you must provide a NEMA 5-15P plug and NEMA 5-15R outlet, or an adapter for other plug types.

Which measurement range should I use for my appliance — the 0.3 W minimum or the 3680 W maximum?

The meter covers 0.3 W to 3680 W continuously; choose based on your appliance’s draw — loads below 0.3 W may not register, while anything above 3680 W will trigger the adjustable overload alert.

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