Vigilant continuous acoustic monitoring: from the SDT route to online

A route with the SDT340 is the backbone of an ultrasound programme. But on some assets a weekly walkdown is not enough: a critical pump, a steam trap on a sterile loop, a bearing in an ATEX zone that is rarely accessible. That is where continuous acoustic monitoring belongs — Vigilant and the related Online4US line.

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When the route is no longer enough

Situation	Risk with infrequent rounds	Solution
Bottleneck bearing	failure between visits	Vigilant 24/7
Steam traps in pharma / clean zones	hidden steam losses	permanent acoustic channel
Hard-to-reach / hazardous areas	points get skipped	remote sensor
Night and weekend shifts	no analyst on site	trend plus alert

The route is not cancelled — it still covers the rest of the fleet. See the 90-day SDT programme.

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What Vigilant delivers

1. A continuous ultrasonic signal from selected points.
2. Trending and thresholds — an alert before the failure becomes audible.
3. Compatibility with the SDT ecosystem — the same measurement logic as the portable instruments.
4. Scalability — from a handful of channels up to a full Online4US system.

Typical points: fan, pump and gearbox bearings; critical steam traps; zones where LUBExpert ON-GUARD or the handheld LUBExpert has already flagged an issue.

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Rollout plan for a plant

Step 1 — audit the route

From your SDT340 reports pick 5–15 points with an unstable trend or a high downtime impact.

Step 2 — Vigilant pilot

Put continuous monitoring on those points. Keep the weekly route running on the rest of the fleet in parallel.

Step 3 — escalation

When levels rise — take a targeted SDT340 measurement (TWF/FFT) and make the maintenance decision. For motors, add Artesis ESA.

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Industries in Kazakhstan

• CHP plants — auxiliary fans and pumps, steam assemblies (SDT at a CHP plant).
• Pharma / food — sterile steam loops (acoustic monitoring of steam lines).
• Mining and processing — critical conveyor and pump assemblies.
• Metals — cooling systems and ID fans.

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Conclusion

Vigilant does not replace the SDT340 — it is the second tier of the programme: online on the 5% most expensive points, route-based on the other 95%. Together with Artesis and vibration it completes the reliability roadmap — 18 months of SDT + Artesis.

Product: Vigilant · manufacturer: SDT.