Key takeaways
Short answer: Thermography and vibration analysis are two condition-monitoring techniques that sense different things. Thermography uses infrared imaging to detect faults that produce abnormal heat — loose or corroded electrical connections, overloaded circuits, friction, failing insulation, blocked cooling. Vibration analysis reads the vibration signature of rotating machinery to detect mechanical faults — bearings, misalignment, imbalance. Thermography sees heat across a broad range of (often electrical) problems; vibration sees the mechanics of rotating equipment. They catch different failure modes. For the technique pair on the wear side, see vibration analysis vs oil analysis.
Thermography — infrared thermography — detects faults by the abnormal heat they produce, using an infrared camera to visualize temperature differences. Many developing problems give off heat before they fail: a loose or corroded electrical connection heats up under load, an overloaded circuit runs hot, a failing bearing or coupling generates friction heat, degraded insulation shows thermal anomalies, a blocked pipe or radiator shows an abnormal temperature pattern. Thermography reveals these as hot (or cold) spots in the thermal image, often well before failure. Its great strength is breadth and speed: a single thermal scan can survey a whole electrical panel, a row of motors, or a section of plant quickly, finding heat-producing faults across many components at once. Thermography is especially the go-to technique for electrical inspections — loose connections and overloads are leading causes of electrical failures and fires, and they announce themselves as heat. Its window into health is temperature: it sees the faults that run hot.
Vibration analysis detects mechanical faults in rotating machinery by reading the machine's vibration signature, as covered in vibration analysis vs oil analysis. Every rotating machine vibrates in a characteristic pattern, and specific mechanical faults — bearing wear, shaft misalignment, imbalance, mechanical looseness, gear defects — produce specific, recognizable changes in that vibration spectrum. By measuring and analyzing the vibration, an analyst or system identifies which mechanical fault is developing and how severe it is, often weeks before failure. Vibration analysis is deep and specific for rotating-machinery mechanics: it does not survey broadly like thermography, but on the rotating equipment it monitors it pinpoints the precise mechanical fault. Its window into health is the dynamic mechanical behavior — how the machine moves — making it the workhorse for the bearing, alignment, and balance faults that dominate rotating-equipment failures.
The clean distinction is what each senses: thermography detects heat-producing faults (electrical, friction, insulation, flow) across a broad range of equipment, while vibration analysis detects mechanical-motion faults (bearings, alignment, balance) in rotating machinery. They catch genuinely different failure modes. A loose electrical connection produces heat (thermography sees it) but no relevant vibration; a worn bearing produces a vibration signature (vibration sees it early) and eventually heat too, but vibration usually catches it sooner in the mechanical domain. Thermography is broad and largely electrical and thermal; vibration is focused and mechanical. This makes them complementary rather than competing — thermography surveys widely for heat-producing problems (especially the electrical faults vibration cannot see), while vibration goes deep on the rotating-machinery mechanics thermography would miss until they ran hot. Using only one leaves a class of faults undetected: the electrical and thermal problems thermography catches, or the early mechanical faults vibration catches.
A plant runs both techniques on its electrical and rotating assets. A thermographic scan of the main switchgear and motor control center reveals a hot spot at one breaker connection — a loose, corroded electrical connection heating dangerously under load, a classic electrical fault that produces heat but no useful vibration signal, and a leading cause of electrical failures and fires. The thermography caught it on a quick broad scan. Separately, vibration analysis on a critical pump picks up a developing bearing fault: a characteristic frequency rising in the spectrum, flagged weeks before failure — a mechanical fault that would not have shown meaningful heat until much later. The thermography found the electrical connection problem across a broad survey; the vibration found the early mechanical bearing fault with depth. Each caught a fault in its domain that the other could not, and together they covered both the electrical/thermal and the mechanical failure modes.
Because thermography and vibration analysis sense different failure modes, a comprehensive condition-monitoring program uses both, each where its strength lies. Thermography is applied broadly and especially to electrical systems — switchgear, panels, connections, motors — and to thermal and flow problems, where its quick, wide-area scanning catches heat-producing faults across many components. Vibration analysis is applied to critical rotating machinery, where its depth pinpoints the mechanical faults that dominate those assets' failures. Together with oil analysis on the lubrication-and-wear side, they form a condition-monitoring toolkit that covers electrical, thermal, mechanical, and wear failure modes — far more than any single technique. The practical approach is to match each technique to the failure modes that matter for each asset: thermography for the electrical and thermal, vibration for the rotating-machinery mechanics, recognizing that the techniques are complementary windows into different kinds of developing fault.
Both techniques are tools of condition monitoring feeding condition-based and predictive maintenance, which protect the availability factor of OEE by catching developing faults before they become unplanned downtime — the biggest availability loss. Thermography catches the electrical and thermal faults (a loose connection that would eventually trip or burn, an overload, a cooling problem) before they cause a failure; vibration catches the mechanical faults before a bearing seizes. Each converts a would-be breakdown into planned work, lifting reliability and availability, and because they cover different failure modes, using both catches more of the unplanned downtime in the six big losses. They are the sensing layer behind condition-based maintenance, the path from detection to higher OEE availability.
Fabrico connects condition-monitoring effort to the availability it protects. While thermography and vibration sense developing electrical and mechanical faults, Fabrico's downtime and OEE data reveals which assets and failure modes actually cost the most availability — telling you where investing in thermographic scanning or vibration monitoring will pay off most, and confirming whether catching faults early is genuinely reducing unplanned downtime. It grounds the choice of technique in real OEE impact. Book a demo to target condition monitoring where it protects OEE most.
Thermography (infrared) detects faults that produce abnormal heat — loose electrical connections, overloads, friction, failing insulation. Vibration analysis detects mechanical faults in rotating machinery — bearings, misalignment, imbalance. Thermography senses heat across a broad range; vibration senses rotating-machinery mechanics.
Heat-producing faults: loose or corroded electrical connections, overloaded circuits, friction in bearings and couplings, failing insulation, and blocked cooling or flow. It is especially used for electrical inspections, since loose connections and overloads run hot and are leading causes of electrical failures.
Use vibration analysis for rotating machinery where mechanical faults — bearing wear, misalignment, imbalance, looseness — are the dominant failure modes. It catches these early and pinpoints the specific fault from the vibration spectrum, often before they produce significant heat.
Yes, because they catch different failure modes. Thermography surveys broadly for electrical and thermal faults; vibration goes deep on rotating-machinery mechanics. Each covers the other's blind spot, so together they detect far more developing faults than either alone.
Both feed condition-based and predictive maintenance, protecting availability by catching developing faults before unplanned downtime. Thermography catches electrical and thermal faults, vibration catches mechanical ones — converting breakdowns into planned work and lifting OEE availability.
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