The OddityRC PM90 is a DC power meter and data logger for measuring what a build draws from its power source. With XT60 connections, a colour display and USB data export, it suits repeatable bench comparisons of compatible RC power systems. Its value is the record of a test: voltage, current, power, charge and energy together.
In this guide: specifications · Why energy belongs beside peak current · Where to put PM90 · Use the logging workflow deliberately · FAQ
OddityRC PM90 DC Power Meter & Data Logger at a glance
| Item | Listed detail |
|---|---|
| Measurement voltage | 6–85V DC |
| Rated current | Up to 90A; selectable 40A / 90A ranges |
| Recording | 128MB onboard; up to 166Hz |
| Export | USB PC software; CSV and playback |
| Connections | XT60 input / output |
| Dimensions | 60.0 × 42.4 × 20.0mm, including connectors and buttons |
Why energy belongs beside peak current
A peak-current number answers a short question about load. Wh and Ah help describe the full test interval. If you want to compare two setups, record both the demand and how long it lasted. A lower peak on one run does not establish that it used less energy over a different route or duration.
Start with a written test condition: battery, charge state, motor, propeller, cooling and test length. Change one item, then repeat. Label the CSV with the configuration while it is still on the bench. This turns an interesting graph into a comparison you can revisit when choosing components.
Where to put PM90
Connect the compatible DC source to the meter input and the load to its output, checking polarity and direction. For a charger-input test, the recorded energy includes what the charger consumes from that source. It is not automatically the energy stored in the battery, because charger losses and other consumption are part of that path.
For a multirotor, a meter in the main battery lead sees the combined load. Four motor channels can exceed a limit that one ESC channel stays below. The PM90 page gives a 90A rating without a continuous-duration thermal specification; check the planned load and temperature rather than treating 90A as a target to sit on.
Use the logging workflow deliberately
The product lists approximately six hours of storage at its maximum recording rate. Choose the recording settings around the event you need to examine. A brief voltage sag and a long endurance comparison ask different questions, so keep the test purpose visible when choosing the settings.
Firmware and desktop software also need to match: the page pairs firmware V1.4.x with PC software V1.3.0, and V1.3.x with software V1.2.0. Obtain the current manual and files through OddityRC support before your first recording session.
Before you choose
- Confirm the source, load and connectors are within the full test envelope.
- Record the setup and use a repeatable test interval.
- Save the CSV with configuration and firmware details.
Frequently asked questions
Does PM90 protect the build from a short circuit?
No. The page states that overvoltage, overcurrent and reverse-polarity protection are not built in. It is a measurement device.
Can PM90 feed current data into my flight controller?
The current listing documents USB PC monitoring and export. It does not confirm an FC, CAN or OSD data output.
Can I measure a 5V output?
The listed measurement range starts at 6V. A 5V rail falls below that stated range.
Explore the configuration
View OddityRC PM90 DC Power Meter & Data Logger options and current specifications. Select the exact variant, then check the remaining parts of your build against its requirements.
Sources and related reading
Product details checked on 30 October 2026: OddityRC product listing. Read the related product guide, or browse Last update for the full article archive.
