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The most affordable and easy-to-use precision DC energy analyzer.


Joulescope measures current and voltage, then computes power and energy.

Measuring energy consumption during product development is crucial, especially for battery powered and always-on devices.  However, measuring energy consumption accurately has been expensive, tedious or error-prone.

We’ve designed something better.  Meet Joulescope!

Joulescope measures current and voltage, then computes power and energy.  Joulescope™ enables designers, engineers, and makers to quickly and easily optimize the energy consumption and battery life of a target device. Joulescope is designed to automatically handle wide current ranges and rapid changes in energy consumption, while allowing the target device to run normally.

View instantaneous values


View waveforms over time

All on your computer.



Amazing dynamic range

Joulescope accurately measures electrical current over 9 orders of magnitude from amps down to nanoamps. This wide range allows accurate and precise current measurement for modern devices. Sleep modes are often just nanoamps (nA) or microamps (µA). Active modes are often milliamps (mA) or amps (A).

Easy to use

Joulescope reports cumulative energy consumption along with real-time current, voltage, and power. The multimeter view clearly shows the most recent value while the oscilloscope view allows you to explore changes over time. Much simpler and more accurate than anything in its class!

Low voltage drop

Most multimeters and current meters have a significant voltage drop (sometimes called burden voltage or insertion loss) which effects the actual voltage delivered to the device under test. Joulescope has a total voltage drop of 25 mV at 1 A, which keeps your target device running correctly. Joulescope’s extremely fast current range switching maintains low voltage drop even under rapidly varying current demands.


The Joulescope host software is open source on GitHub. You can also swap the banana jack front panel with front panels that have other connector types! The front panels are open source on GitHub.

Makes the invisible visible

Joulescope measures current and voltage 2 million times per second with 250 kHz bandwidth. This high sampling rate makes the power consumption of interrupt service routines, inrush currents and other short events visible.


Joulescope is affordable and priced so that every developer on the team can have one at their desk. With such convenient access, Joulescope allows developers to see the impact of their changes on energy consumption immediately. Developers can make informed choices to account for battery life during design. Eliminate power consumption surprises during final product testing!


  • Microcontroller current measurement and optimization
  • Designing power-efficient software and firmware
  • Extending battery life
  • Hardware power optimization
  • Sleep current optimization
  • Hardware and software troubleshooting
  • Software power characterization and interrupt service routine profiling
  • USB 2.0 inrush and suspend current pre-compliance testing
  • General-purpose current, voltage, power, and energy measurement

Contact Us Today!

Tra-Cal is the official calibration provider for Joulescope™, a new, affordable precision DC energy analyzer that enables engineers to build more energy-efficient products.  Joulescope measures current and voltage, then computes power and energy.  Optimizing energy consumption and battery life has never been easier or more affordable. Joulescope automatically handles wide current ranges and rapid changes in energy consumption while allowing the target device to run normally.  With ISO 17025:2017 NIST-traceable calibrations and recalibrations provided by Tra-Cal, Joulescope delivers accurate measurements for the most demanding industries and products.

As a partner with JetPerch, we can provide integrated solution to meet your test & measurement needs along with Joulescope test solutions.

Contact NSCA today to learn how we can provide integrated solutions with Joulescope test solutions.

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