VuDejaLink | Energy Budget Verification for Industrial Wireless Sensors

The Problem

The sensor is cheap.
The ladder isn't.

Condition-monitoring sensors don't fail because the electronics fail. They fail because the battery dies, and someone has to go get it.

→A truck roll, a two-person crew, an hour on site. All for a 90-second task. Multiplied by every node, every 2–5 years.

→The assets that need monitoring most are the hardest to reach: pole-mounted transformers, remote pipelines, railway traction motors, ski lifts.

→So the fleet stays dark. The first signal a transformer gives you is a neighborhood without power.

Utility bucket truck crew servicing a pole-mounted distribution transformer at height

A truck, a crew, traffic control, an hour on site. The real price of a $5 battery.

The Shift

Sized from a datasheet, at 25 °C, on the average.
Measured on your machine, through the worst gap.

Energy harvesting has a credibility problem, and it earned it: fifteen years of brochure numbers that never survived the field. Averages lie. The worst two weeks of the year kill the node, not the mean. That's why we don't estimate. We instrument.

The Method

One week. Five numbers.
One verdict.

We instrument your asset with calibrated thermal probes: magnet and clamp mounted, zero penetration, no wiring into your equipment, no engineering change order. Seven days of continuous logging produce the five numbers that decide everything:

ΔT profile

Surface vs. ambient, sampled every minute for 7 days. The real duty cycle of your heat.

Worst gap

The longest stretch with no usable ΔT. This number, not the average, sizes the storage.

True consumption

Your sensor's real µA profile, measured with instrumentation a multimeter can't match.

Leakage at temperature

Storage self-discharge at field temperature. It roughly doubles every 10 °C above the datasheet.

Cold-side margin

Whether the heatsink saturates under real airflow. The mechanical failure no simulation shows.

The deliverable is a written verdict: harvestable energy vs. your sensor's budget: go, no-go, or "go, with this architecture." A documented "no" is a completed job. It just saved you a failed deployment. Fixed fee, typically $1,500–$3,500 per site, scope-dependent.

The Technology

From waste heat to a decade of uptime.

When the budget closes, the architecture that survives the field is measurement-driven: a thermoelectric harvesting chain sized against the worst gap, not the brochure.

Concept: finned thermoelectric power module magnet-mounted on an industrial electric motor housing

Concept: the retrofit thermal power module. Finned cold side toward the airflow, thermoelectric core against the machine skin, magnet mount. Installed in the time it takes to place it.

→No wires into the asset. No engineering change order, no voided warranty, no electrician per install.

→Sized from measurement, against the worst gap of your machine, never a datasheet "typical".

Retrofit form factor: magnet or clamp mount. No wires into the asset. No voided warranty.every node reports its own harvested energy, so silence is never ambiguous

One power core. Three harvest front-ends.

The energy brain is universal: the same PMIC, storage, radio and microamp firmware serve every deployment. Only the harvesting front-end changes with the physics of your site. Thermal is our beachhead because machines never stop being hot; the solar and vibration variants carry the same core to assets that have no waste heat.

The thermal module ships first. The other front-ends are the roadmap, built on the same measured core.structures and towers run the solar or vibration variant of the same power core

"Technical concept is excellent." · "A mature approach to risk mitigation… impressive."

Written evaluations from U.S. Army xTech competition judges, 2026. We didn't make the final cut of 12. The written evaluations, and the two objections we're now answering in public, are the asset.

Applications

Wherever the ladder costs more than the sensor.

Electric utilities

Pole-mounted distribution transformers: large ΔT, 24/7/365. Nobody swaps batteries at height across ten thousand poles.

Predictive maintenance

Service fleets across dozens of plants, where every battery visit is an unbilled truck roll and every dead sensor is a churn risk.

Sensor OEMs

The 10 to 15 year battery-life question, answered as a plug-and-play power layer, sized from measured budgets, not "typical" values.

Defense & remote

Mining, naval, rail traction, forward-deployed equipment. Zero-integration retrofit where resupply is the real cost.

Row of industrial motors and pumps inside a plant, the environment where predictive-maintenance sensors live — Plant floors: every motor is a 24/7 heat source for its own sensor.

Railway bogie with traction motor in a rail yard at dusk — Rail traction: pure waste heat, and nobody wants to crawl under a bogie for a battery.

R&D · The Lab

The bench publishes weekly. Especially the failures.

Right now we're running the entire method in the open: a live thermal survey of a working machine, minute-by-minute data, pre-registered decision thresholds, and every result published, good or bad. Follow the numbers as they happen.

Follow the build on LinkedIn →

Measurement bench: waterproof temperature probes, aluminum HVAC tape, microcontroller logger and a live temperature chart

The bench: waterproof probes, aluminum tape, a logger. Every CSV published.

Everyone estimates.
We measure.

The sensor is cheap.
The ladder isn't.

Sized from a datasheet, at 25 °C, on the average.
Measured on your machine, through the worst gap.