Acoustic Steam Leak Indicator (ASLI)

Acoustic Steam Leak Indicator (ASLI)

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Australia Tel: +61 (0)2 9428 7300
Indonesia Tel: +62 21 3040 4422
New Zealand Tel: +64 (0)7 850 2610
South Africa Tel: +27 (0)10 900 2055


The Acoustic Steam Leak Indicator serves as a specialized alert system tailored for real-time monitoring of boiler tubes and early detection of leaks. It can identify leaks as tiny as 5mm in length, before makeup water alarms, and pinpointing the precise location or area of the leak. This system eliminates the need for boiler operators or engineers to rely on alternative methods such as monitoring makeup water usage or temperature fluctuations to detect tube leakage.


  • Modular design – 1 to 32 channels
  • High sensitive rugged Airborne Sensors
  • FFT based signal processing on each channel
  • Highly efficient Digital filter to distinguish leak from background noise
  • Individual alarm thresholds and delay settings for each channel
  • Alarm output relay for use on plant DCS
  • 4-20 mA analog output for each channels. For use on plant DCS
  • Trend plotting and Bar chart for each channels
  • FFT Spectral for better analysis
  • Boiler Mimic with sensor position according to user requirement
  • Soot-blower interlocks
  • Up to 3 years data Backup of all channels
  • Modbus communication over TCP/IP for plant DCS