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The tightest accuracy figure here

PeakTech 0.1 W resolution, 0.005 A resolution, ±0.5 % base accuracy

A plug-in energy cost meter with 0.1 W resolution, 0.005 A current resolution and ±0.5 % base accuracy, showing cost, energy, voltage, frequency and power factor.

PeakTech 9035 energy cost meter with a digital display

PeakTech 0.1 W resolution, 0.005 A resolution, ±0.5 % base accuracy

A plug-in energy cost meter with 0.1 W resolution, 0.005 A current resolution and ±0.5 % base accuracy, showing cost, energy, voltage, frequency and power factor.

Measurement range
Not published as a range; the power factor is shown from about 1 W, second bullet
Low-load accuracy
0.1 W resolution, first bullet, with a base accuracy of ±0.5 %, fifth bullet — THE TIGHTEST ACCURACY FIGURE IN THIS FAMILY
Maximum current
Nowhere in the listing; the current resolution is 0.005 A, fourth bullet
Displayed values
Energy cost in euros, energy consumption in kWh, mains voltage, mains frequency, load current and power factor, third bullet
Memory retention
Nowhere in the listing
Tariff calculation
Energy cost is displayed in euros, third bullet; how the rate is entered is not described
Socket type
Nowhere in the listing
Amazon reference
B00I1GTLWS (same reference on 5 Amazon marketplaces)
EAN
4250569402302
  • ±0.5 % base accuracy, four times tighter than the next figure published here
  • 0.1 W and 0.005 A resolutions both stated
  • No maximum current or power, which every other meter in this family gives

Best for: Measuring small loads where the difference between one watt and two matters.

≈ €11
Check price on Amazon

Specifications

Measurement range
Not published as a range; the power factor is shown from about 1 W, second bullet
Low-load accuracy
0.1 W resolution, first bullet, with a base accuracy of ±0.5 %, fifth bullet — THE TIGHTEST ACCURACY FIGURE IN THIS FAMILY
Maximum current
Nowhere in the listing; the current resolution is 0.005 A, fourth bullet
Displayed values
Energy cost in euros, energy consumption in kWh, mains voltage, mains frequency, load current and power factor, third bullet
Memory retention
Nowhere in the listing
Tariff calculation
Energy cost is displayed in euros, third bullet; how the rate is entered is not described
Socket type
Nowhere in the listing
Amazon reference
B00I1GTLWS (same reference on 5 Amazon marketplaces)
EAN
4250569402302

The most precisely specified plug meter here, with one figure missing.

The numbers

0.1 W resolution. 0.005 A current resolution. ±0.5 % base accuracy.

Three figures, each with a unit. The accuracy is four times tighter than the ±2 % published by the CSL meter in this family, and the other five publish none at all.

What it shows

Energy cost in euros. Energy consumption in kWh. Mains voltage. Mains frequency. Load current. Power factor, from around one watt.

Six values, named one by one rather than summarised as “all the data”.

Why the resolution matters

The loads worth finding are small. A tenth of a watt of resolution means a standby draw is a reading rather than a rounding, and the power factor from one watt upward means a small switching supply can be characterised rather than guessed at.

The gap

No maximum. Every other meter in this family states 3680 W or 16 A — the limit of a domestic socket circuit — and this one does not. Nor does it state the socket type or what happens to the reading in a power cut.

Availability

German, French, Italian and Spanish Amazon stores quoted 11 € to 16 € when this page was compiled.

British Amazon store carries it too, priced in its own currency, which the euro range above deliberately omits.

American Amazon store returned nothing at all, so the buy button there runs a search instead of landing on an empty page.

These figures are what Keepa reported on the day this page was last updated. Availability and pricing move without notice.

Prices quoted in this text were read on 16 September 2026. The live price is at the top of the page.

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All plug-in energy meters