No probes. No wires. No shutdown. Your iPhone can hear the harmonics.
Anchored on the 60 Hz hum, tracking the 2nd to 7th harmonics.
Listen → analyze → read THD in seconds
HumHarmonics listens to the steady hum a transformer makes, isolates the 60 Hz fundamental and its harmonics, and turns them into a clear distortion reading, right on your phone.
Hold the bottom corner of your iPhone toward the transformer, near the center of the housing where the hum is strongest.
HumHarmonics locks onto the 60 Hz fundamental and measures the 2nd to 7th harmonics in real time, with the raw, flat microphone response the app forces on.
Get Total Harmonic Distortion, per-harmonic ratios, and a plain NORMAL · WARNING · CRITICAL status you can capture and save for records.
Checking a transformer usually means clamps, meters, or a scheduled outage. HumHarmonics reads it from the outside, through the sound the core and windings make while the unit stays energized. Point your phone at the hum and you have a distortion figure, with the enclosure left shut and your hands away from the electrical side.
HumHarmonics shows the numbers that matter for transformer health, without a cart of test gear or a shutdown window.
The status color shifts with the measured distortion, so a field tech knows where a transformer stands the moment the reading settles.
Distortion is within a healthy range. The core and windings are behaving as expected.
Elevated distortion consistent with core degradation or saturation. Worth a closer look and a trend over time.
High distortion. Flag the unit for inspection and prioritize it against the rest of your fleet.
Thresholds reflect the app's default status bands. Confirm final threshold values before launch.
No clamp meters, no probes, no shutdown. Point your phone at the hum and read.
Anchors on the 60 Hz fundamental and pulls out the 2nd through 7th harmonics by exact frequency.
One distortion figure with a green / amber / red status, so the answer is obvious in the field.
A real-time bar graph of the fundamental against its harmonics helps you see the harmonic landscape.
Save timestamped THD readings to document inspections, rounds, and condition over time.
One less instrument on the truck. If you have your iPhone, you have a harmonic analyzer.
Any line-fed transformer running on a steady 60 Hz supply produces a hum rich in harmonics. HumHarmonics is happiest on dry-type units you can safely get a phone close to.
The core focus, open, ventilated, and easy to get a reading near.
Step-down transformers in electrical rooms and mechanical spaces.
Distribution transformers feeding process equipment and MCCs.
Water, wastewater, and facility transformers on routine rounds.
Isolation and PDU transformers where harmonics matter most.
Solar and inverter-adjacent transformers on the AC side.
Where you can safely approach the enclosure from outside.
From a safe, permitted distance, a quick harmonic sanity check.
Safety first, always. HumHarmonics is a non-contact aid, not a reason to enter an energized space. Take a reading only from where you are trained and permitted to stand, and follow your site's electrical-safety rules. It reads best on line-fed, constant-frequency transformers; oil-filled and heavily enclosed units may muffle the hum.
Popular with electricians, plant and facility maintenance, and municipal water & wastewater teams, useful anywhere a transformer needs a quick harmonic check.
HumHarmonics is launching on the App Store. Leave your email and we'll tell you the day it's live.
