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Capacitance and esr (equivalent series resistance) meter

Peak Atlas ESR70: Capacitance and ESR Meter

Peak ESR70

Peak Atlas ESR PLUS Low Resistance and Capacitance Meter

The new Peak ESR70 Atlas ESR PLUS Capacitor Analyzer introduces new features including "Audible Alerts" and enhanced measurement range. Every measurement of the ESR (equivalent series resistance) tester will be shown on the display as usual, but this unit will also produce a variety of tones depending on the ESR value, and the tones themselves are surprising pleasant, including Bell-like dings, a "Beep-Barp" tone for ESR that is likely to be too high, and also a reassuring "Blip" when the measurement has started and completed.

The Peak Atlas ESR70 measurement range has doubled, measuring from 0 to 40 ohms with a resolution as low as 0.01 ohms. This amazingly fine resolution is great for assessing large capacitors and will allow you to use the Peak Atlas ESR+ for tracing short-circuits, running meter tests, testing meter circuits and finding the precise area of a PCB.

Measuring a capacitor's equivalent series resistance (ESR) is a great indicator of the condition of a capacitor. Unlike other capacitor meters, the Atlas ESR capacitor meter offers instantaneous results. If the instrument is switched on you simply connect the probes to your capacitor and the analysis will begin automatically. You can use the Atlas ESR PLUS in-circuit, which will save you the trouble of removing capacitors. When you test capacitors out-of-circuit, the ESR+ will also display the capacitance. To analyze your network cables, we recommend the Peak Atlas UTP05.


  • Simple capacitor ESR meter and tester
  • ESR resolution as low as 0.01 Ohm
  • Audible alerts
  • Built-in protection circuitry means risk of damage to the unit due to residual charge is greatly reduced
  • Integrated controlled discharge circuitry reduces the need to manually discharge capacitors before test
  • Use in or out of circuit for ESR measurement and testing
  • Automatic and manual power-off
  • Can also be used for low-Ohms resistance checking

What's Included

  • Peak Atlas ESR+ with attached 45 cm silicone test leads


Peak Test Current into S/C ±20 mA ~ ±25 mA
Peak Test Voltage Across O/C ±2.5 V ~ ±3.0 V
Capacitance Measurement Range 1 µF ~ 22,000 µF
Capacitance Accuracy ±4% ±0.2 µF
ESR Measurement Range 0 Ohm ~ 40 Ohm
Resolution - ESR < 2 Ohm 0.01 Ohm ~ 0.02 Ohm
Resolution - ESR > 2 Ohm 0.1 Ohm ~ 0.2Ohm
Accuracy - ESR < 2 Ohm ±1.5% ±0.02 Ohm
Accuracy - ESR > 2 Ohm ±1.5% ±0.2O
Abuse Voltage C < 10 µF ±275 V, C > 10 µF ±50 V
Auto-Discharge Voltage Limit ±50 V
Battery Type MN21/GP23A 12V Alkaline
Battery Voltage Range 8.5 V ~ 12 V
Battery Voltage Warning Threshold 8.5 V
Inactivity Power-Down Period 30 s
Dimensions 4.1 in. x 2.8 in. x 0.8 in. (103 x 70 x 20 mm)
Operating Temperature Range 50°F to 104°F (10°C to 40°C)
Net Weight 3.5oz (0.098kg)

*Specification Summary at 68°F (20°C) unless otherwise specified


 Warning: this product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to: www.P65Warnings.ca.gov/product