Discovery Sound Technology (DST)

Detect equipment failures before they happen — without shutting anything down.

The Solution to Reactive Maintenance

Discovery Sound Technology (DST) is a patented predictive maintenance (PdM) platform that uses high-frequency ultrasound to diagnose the real-time condition of HVAC/R equipment. Unlike traditional inspection methods, DST captures, analyzes, and documents equipment health data — including remaining useful life estimates — while systems remain fully operational.

DST's cloud-based Discovery Platform transforms raw ultrasound data into actionable diagnostics, trending reports, and capital planning recommendations — putting technicians, business owners, and their clients on the same page.

Benefits of Discovery Sound Technology

Early Fault Detection – DST identifies abnormal sounds — friction, impacts, cavitation, and bearing wear — at an early stage, long before they produce visible symptoms or cause component failure.
Non-Destructive Testing – Ultrasound inspection is completely non-intrusive. DST can be used during normal equipment operation with no shutdowns, no disassembly, and no risk of damage.
Up to 50% Faster Than Other Methods – DST's platform is designed for efficiency. Technicians can complete diagnostic scans significantly faster than with comparable methods.
Cloud-Based Reporting and Trending – Every scan is date- and time-stamped and stored in DST's cloud platform. Technicians and clients gain access to full equipment history, trend reports, and capital asset repair or replacement recommendations over time.
Improved Client Transparency – DST generates professional tasking sheets, photo and video documentation, and field technician notes — making it easy to communicate findings.
Versatility Across Equipment Types – DST works on chillers, air handlers, rooftop units, pumps, motors, compressors, gears, valves, and more — making it useful across the full scope of HVAC/R service work.

Switch to Proactive Maintenance

How Does DST Work?

DST uses high-frequency ultrasound — a proven, non-destructive testing method — to listen for the sounds that indicate mechanical stress, wear, and impending failure inside HVAC/R equipment. Because ultrasound detects anomalies at a microscopic level before they produce heat, vibration, or visible damage, it gives technicians a critical early-warning advantage.

Scans can be performed while equipment is running, with results fed directly into the cloud-based Discovery Platform for analysis, trending, and documentation.

For ongoing monitoring, DST's RMx (remote monitoring) technology allows ultrasound sensors to be mounted permanently on equipment, providing continuous condition data throughout the life of the asset — without requiring a technician to be on-site for every reading.

What DST Can Detect?

DST's ultrasound diagnostic platform can identify a wide range of mechanical and system conditions, including:

Bearing and motor wear
Friction and impact events in rotating components
Cavitation in pumps and compressors
Air, gas, and refrigerant leaks
Electrical issues and arcing
Valve and gear abnormalities
Early-stage compressor degradation

Why Yale Mechanical for DST?

When you choose Yale Mechanical, you get:

Expert equipment assessments using DST ultrasound diagnostics to establish baseline condition and identify existing issues
Ongoing scheduled scanning with full documentation, trend reports, and capital planning recommendations
Clear, client-facing reporting that explains equipment health in plain language — no guesswork, no surprises
Integration with our planned maintenance programs for a complete picture of your building’s mechanical systems
A trusted partner with 85+ years of experience serving facilities throughout the Minneapolis, St. Cloud, and Upper Midwest region