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Mandatory Verification of Audiometric Equipment

A hearing threshold is only meaningful if the audiometer that measured it is telling the truth. Verify the earphones against a reference ear, not just the electronics against a meter.

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Gas Leak Detection

A compressed air or gas leak is invisible and often inaudible to a walking inspector — but it's never silent at ultrasonic frequencies. See the leak before it shows up on next month's energy bill.

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Why It Matters

Compressed air, nitrogen, and other pressurized gas leaks generate turbulent flow that radiates most of its acoustic energy well above the range of human hearing — often 20 kHz and higher. An inspector walking the plant floor simply can't hear it, and by the time a leak is large enough to notice from the hiss alone, it's already been wasting energy for months.

An acoustic imager makes the invisible visible: its microphone array picks up the ultrasonic signature a leak produces and overlays it directly on a live camera image, turning a slow manual sweep with a handheld ultrasonic detector into a fast, visual scan across an entire area.

Aihua's YT2001 covers this end to end — locate the leak, quantify its flow rate, and document it for the maintenance record.


  • 3 ml/s



    Minimum detectable leakage at 0.5 m and 200 kPa — small enough to catch a leak long before it becomes a major loss

  • 1–65 kHz

    Frequency range covered, reaching well into the ultrasonic band where leak noise concentrates

Field Practice Finding a leak is only the first step — knowing how much it's actually costing is what justifies the repair on a maintenance schedule.

  • Sweep

    Walk the route with the imager and watch for any concentrated ultrasonic signature on the overlay — pipework, fittings, valves and connections

  • Isolate

    Move in on the indicated point to confirm exactly which fitting or joint is leaking, even against a noisy plant background

  • Quantify & Log

    Record the leak's estimated flow rate alongside its image, so repairs get ranked by cost impact instead of guesswork

                                             See the Leak, Measure the Cost

YT2001 Acoustic imager

YT2001 Advanced Acoustic Imager 

Capture steady-state and transient sound sources with a 25 FPS high-speed refresh
rate — fast enough to track moving or fleeting sound events as they happen

Choose between 136-channel MEMS digital microphone arrays for precise, reliable
sound source localization, even in complex industrial environments.

Adjustable frequency band filtering actively suppresses interference, so you get
clean, accurate detection results even on noisy factory floors.

Don't just find gas leaks — measure them. Real-time leak rate calculation combined
with intelligent auto-focusing locates and quantifies leakage sources in seconds.

Built-in real-time PRPD (Phase Resolved Partial Discharge) spectrum analysis helps
electrical engineers detect insulation faults before they become failures.

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                                                                The Usual Suspects

                                                                                              Compressed air and gas systems lose money continuously once a leak starts — these are the areas worth a routine scan.

Compressed Air & Gas Distribution Lines

Routine scans along plant compressed-air piping catch leaks at joints, fittings and valves before they compound across a whole distribution network.

Valves, Seals & Pressure Vessels

Aging seals and valve packing often leak long before a pressure drop is noticeable on a
gauge — an early visual scan catches it
while it's still a minor fix.

Energy Audits & Loss Prioritization

A site-wide scan with logged flow-rate estimates turns a vague "we probably have leaks somewhere" into a ranked repair
list by actual cost impact.

YT2001 Advanced Acoustic Imager
about us
T​​​​hree Decades Building the Reference Standards Themselves
Hangzhou Aihua Instruments has been designing and manufacturing acoustic and vibration measurement instruments since 1992 — including the calibrators recommended on this page. Our sound level meters and calibrators hold National Type Approval Certificates and are CE tested, and Aihua has drafted and co-drafted national standards for sound level meters, giving us a direct hand in the requirements these instruments are built to meet.

That combination — building both the measurement instruments and the calibration references behind them, under one roof — is what lets a sensor manufacturer source a production-line reference standard from the same company whose broader instrument line already meets the standards your customers expect.

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  •             Common Questions About Acoustic Gas Leak Detection

  • 1. Why can't I just listen for the leak myself?

  • 2. What gases does this work for?

  • 3. How accurate is the flow-rate estimate?

  • 4. Can this be used in a loud industrial environment?

Any questions? We look forward to hearing from you.

phone-5 Tel: +86-19012832378

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