Most condition monitoring programs have a blind spot—not because they're monitoring the wrong assets, but because they're reading only one kind of signal. Thermal and vibration read the same asset through different physical signals. Running only one means some failure modes arrive late, and every alert stands uncorroborated.
Thermal monitoring reads heat, so it catches electrical faults like loose connections, overloaded conductors, or VFDs running hot. It also flags friction-driven mechanical problems such as lubrication failure, misalignment under load, and dragging components. What it can't see is motion that hasn't yet produced heat.
Vibration monitoring reads motion, catching bearing wear, imbalance, and misalignment at their earliest mechanical stages. But it won't flag an electrical fault or a friction problem that generates no meaningful motion change.
Even permanent vibration systems typically sample on an interval, typically a snapshot of seconds each hour. Always-listening monitoring closes the time gap on transient and intermittent-duty faults that occur between snapshots.
When both signals are on the same asset, the pattern between them tells you more than either signal could alone. One signal flags, the other confirms, and that changes both your team's confidence and how they prioritize.
Adding a new sensor that requires a new platform or a new workflow doesn’t help either—it just increases the work it takes to diagnose a problem. A true multi-sensor platform extends the workflows your team is already using to include all the failures modes you need to cover.
If your team runs IR thermography and vibration, in either continuous or planned routes, you're already ahead of most facilities. The problem is this: Uncorroborated, single-lens, or snapshot-based monitoring creates a visibility gap, one that’s decreasing your maintenance team’s alert confidence, increasing their triage time, and costing you real downtime every time it misses.
A sorter drive motor can fail in different ways:
1. A bearing wears, a coupling drifts. This shows up first as abnormal motion, then as friction heat.
2. A connection loosens, a VFD runs hot, insulation breaks down. This shows up as heat.
Same asset, different failure modes, two different signals. Monitor only one, and you have full visibility into half the problem.
That's the gap behind two of the most common things reliability teams say when a new monitoring conversation comes up: “We already have IR” and “We already have vibration.”
Both might be true, but both also leave a known blind spot, just on opposite sides of the same asset.
Thermography is strong where it's supposed to be strong: loose terminations, overloaded conductors, failing capacitors, and other electrical faults that generate heat early and visibly. And its reach doesn't stop at the panel: friction is heat, so lubrication starvation, misalignment under load, belt and coupling drag, and overloaded gearboxes all carry a thermal signature.
That's exactly why IR has been the default for so many reliability programs. But mechanical degradation doesn't always announce itself as heat.
Vibration monitoring reads the motion side of the asset: imbalance, looseness, and bearing wear, often at a stage before they produce the friction heat a camera would see. That earliness is the point. For classic rotating-element wear, vibration typically moves first on the failure curve, which means more runway to plan the repair instead of reacting to it; for friction and lubrication faults, heat can lead, which is where the thermal signal picks up the story.
What it doesn't see is anything that expresses as heat without a motion change, and that's a wider set than most vibration-first teams assume.
Electrical is the obvious half: a loose connection, a VFD running hot, a degrading insulation system—none of those registers as meaningful vibration. But heat-only failures show up on the mechanical side too: lubrication breaking down, a dragging component, or a motor overheating under load can all run hot before, or without, shifting the vibration profile. A team running vibration-only monitoring has strong coverage of rotating-element wear, but they have a gap across the thermal signature of the same asset, and the electrical faults in that gap are often the ones that escalate fastest once they start.
There is a second gap inside vibration programs themselves: time. “Continuous” online systems often aren't, because many sample on an interval, capturing a few seconds of data each hour, with route-based collection filling in monthly at best. That cadence suits slow-developing wear on steady-state machines. It suits intermittent-duty assets far less, because a fault that only appears while the asset is cycling can start and finish between snapshots.
MultiSensor AI’s vibration monitoring makes the opposite trade by design: It tracks trend-level indicators rather than deep spectral snapshots, and in exchange it listens all the time, sampling roughly every second while an asset is active, every 10 seconds at idle, and responding instantly to sudden changes. It is not a replacement for the spectral analysis your vibration specialists run. It is what makes sure they are pointed at the right asset at the right time.
This is exactly why thermal and vibration are more useful together than either is alone: Each one acts as a check on the other. When a team can see both signals on the same asset, the pattern between them tells a more complete story than either signal would on its own. Corroboration also cuts noise: A single elevated reading on one signal, unconfirmed by the other, gets triaged down instead of dispatching a technician.
Four patterns tend to show up:
None of this replaces judgment. The patterns help a team prioritize where to look first and how urgently, but they don't diagnose the asset automatically. A reliability engineer still makes the call. What changes is how much guesswork goes into that call, and how early they're making it.
MSAI Connect now brings vibration monitoring into the same platform reliability teams already use for thermal condition monitoring. It's not a replacement for IR, and it's not a standalone vibration diagnostics product layered on top of what you run today. It's the same workflow, extended to cover the failure modes thermal alone can't see, and vice versa.
For teams running IR today, that means adding mechanical visibility on rotating and intermittent-duty equipment without standing up a new program or a new dashboard.
For teams running vibration today, the question is different, because “we have vibration” rarely means vibration everywhere, all the time. Permanent systems were typically reserved for the most critical assets, with the rest of the plant on periodic routes, and even permanent systems tend to sample on an interval rather than listen continuously.
That leaves two gaps: the balance of rotating and intermittent-duty equipment that never justified a permanent install, and the transient faults that start and finish between snapshots. MSAI Connect closes both with monitoring that is continuous and always listening, pairing thermal and vibration natively on the same assets. It correlates the signals it monitors, not data ingested from third-party sensors, so what reaches your team is a corroborated pattern, not a single noisy reading. Your existing vibration program keeps doing what it does well on the assets it already covers.
If you're running one of these today, the question worth asking isn't whether your condition monitoring program works. It's understanding what it can't see yet, and whether that's the failure mode you can least afford to miss.
If you’re ready to see how multi-sensing monitoring can help your maintenance and reliability efforts, our team is eager to explain in a quick demo—schedule it here.
Partly, and the distinction matters. Continuous thermal monitoring catches the mechanical faults that produce friction heat, and catches them far earlier than periodic routes do, because it watches the asset all the time instead of on survey day. What no inspection frequency fixes is the class of mechanical faults that show up as motion before they show up as heat. That is a modality gap, and it is the one vibration closes.
Because “earlier” depends on the failure mode, and because the two signals read different physics on the same asset. Vibration typically leads on rotating-element wear: bearing defects, imbalance, misalignment. Heat leads on friction and lubrication faults, and it is the only signal for anything that runs hot without a motion change: a loose termination, an overloaded conductor, a VFD running hot, lubrication breaking down, or a motor overheating under load. IR also corroborates what vibration flags, since friction-driven mechanical faults carry a heat signature, which is what turns a single reading into a pattern worth acting on. Running vibration without IR means the heat side of the asset—electrical and mechanical alike—depends on whatever your existing systems happen to catch.
The pattern between the two signals is what drives the maintenance decision. Thermal elevated, vibration normal points toward an electrical or connection issue. Both elevated suggests mechanical degradation is progressing and worth scheduling work around. Vibration elevated, thermal normal is an early mechanical signal worth watching. And both normal is corroborated confidence to defer work. Neither signal alone gives you that context—it requires both on the same asset.
Cadence. Many online systems sample on an interval, capturing a short snapshot each hour, which suits slow-developing wear but can miss transient faults, especially on intermittent-duty assets that only generate a signal while cycling. MSAI's vibration monitoring listens all the time, sampling roughly every second under active vibration, every 10 seconds at idle, and responding instantly to sudden changes, with thermal on the same asset to corroborate what it flags. It is not a replacement for deep spectral analysis; it is the screening layer that points your specialists at the right asset at the right time.
If your program is IR-based, no. Vibration is additive, extending the same platform and workflow into the failure modes thermal doesn't see early. If your program is vibration-based, your existing program continues on the assets it covers. MSAI Connect correlates the signals it monitors natively rather than ingesting data from third-party vibration hardware, and it extends continuous, corroborated thermal-plus-vibration coverage to the assets and failure windows your current setup doesn't reach.
The highest-value assets are ones that carry both electrical and mechanical risk, such as sortation drive motors, conveyor bearings, pumps, compressors, and fans in high-throughput or uptime-critical environments. Intermittent-duty assets like divert actuators are also strong candidates, since they may only generate a fault signal when they're actively cycling, which is exactly when vibration monitoring is watching.