I Paid $25,000 to Find This Leak

TL;DR

The Fluke II915 acoustic imager found two compressed air leaks in minutes by visualizing sound as a heat map.

Key Points

• 1.The Fluke II915 costs $25,000 and uses 64 microphones arranged in a logarithmic spiral to detect sound between 2 kHz and 100 kHz, far beyond human hearing.
• 2.It found two leaks in the workshop's compressed air system within about two minutes — one was a missing O-ring, the other a faulty regulator that was rebuilt.
• 3.The built-in "Leak Q" mode calculates the cost of a leak based on gas price and energy cost; even a small air leak was estimated to cost $45/year.
• 4.For low-pressure systems like clean rooms, Fluke's Beacon device emits 40,000 Hz sound to pressurize and locate leaks without pumping in compressed air.
• 5.The imager also identified coil whine on a GPU, pinpointing it to the VRM area near the 12VHPWR connector, and located a USB fiber optic dock emitting 10,000 Hz noise.
• 6.Cheaper alternatives exist: the Fluke III500 (~$85,000, leak detection only), and open-source options like the Centenna modular system, though calibration reliability varies.