Atlas ESR70 Plus Capacitance and Equivalent Series Resistance Meter

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Quoting product code: N24NC


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About this product


  • Meter capable of measuring capacitance and equivalent series resistance (ESR)
  • Measure ESR from 0&ohm to 40&ohm
  • Measure capacitance from 1µF to 22,000µF

Product overview

• Meter capable of measuring capacitance and equivalent series resistance (ESR)
• Measure ESR from 0Ω to 40Ω
• Measure capacitance from 1µF to 22,000µF
• Requires one 23A battery (included)
• Measures just 103mm x 70mm x 20mm

What is an ESR meter?
An ESR meter is a two-terminal electronic measuring instrument for measuring the equivalent series resistance (ESR) of real capacitors without the need to disconnect the capacitor from the circuit it is connected to.

What makes this version different from the ESR60?
The ESR70 comes with a wider ESR measurement range. This model measures from 0Ω up to 40Ω whereas the ESR60 only measures to 20Ω.

How easy is this meter to use?
The ESR70 is very easy to use – it will automatically detect when the test clips are applied to a capacitor and start its analysis. A unique feature of this meter is the ability to detect if the capacitor is charged. If the capacitor is charged then the ESR70 will discharge the capacitor using a constant power algorithm designed to prevent nasty discharge currents.


Parameter Minimum Typical Maximum
Peak test current into S/C ±20 mA ±22 mA
Peak test voltage, full scale ESR ±40 mV ±44 mV
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 Ω 40 Ω
ESR resolution for ESR < 2O 0.01 Ω 0.02 Ω
ESR resolution for ESR > 2O 0.1 Ω 0.2 Ω
ESR accuracy for ESR < 2O ±1.5% ±0.02 Ω
ESR accuracy for ESR > 2O ±1.5% ±0.2 Ω
Abuse voltage (for C < 10µF) ±275 V
Abuse voltage (for C > 10µF) ±50 V
Auto-Discharge voltage limit ±50 V
Battery voltage range 8.5 V 12 V
Battery voltage warning threshold 8.5 V
Operating temperature range 10 °C 40 °C

Can this measure small caps like 103 and 104 ceramic caps.

Asked by: Warren
You may struggle to get the clips onto really small caps, but if you are able to the device would be able to read them.
Answered by: Russell
Date published: 2017-08-25
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