“I can hear it… but can’t pinpoint it.”

Whether background noise is high or the leak is small, ultrasonic detection helps you zero in on the source by capturing airborne ultrasound from compressed air, compressed gas, and vacuum leaks.

SDT SonaVu Acoustic Imaging Camera with receiver

Best for: Compressed air system leaks, compressed gas system leaks, vacuum leaks.

Why pros like it: Scan wide, then pinpoint leaks up close.

“I suspect a gas leak, and I need a clear go/no-go fast.”

For natural gas, methane, and propane work, confirm gas presence fast and follow the audible tick to the source. Readings display in ppm and auto range to percent LEL.

SENSIT HXG Combustible Gas Leak Detectors

Best for: Locating small gas leaks. area monitoring, arson/accelerant detection.

Why pros like it:  Audible and visual alarms flag hazards, tick rate helps pinpoint leaks.

“This refrigerant leak may be small, but it can lead to bigger system issues.”

Track down hard to locate leaks in HVAC/R systems with a dedicated refrigerant detector that uses audible and visual indicators to help guide you to the source.

REED Instruments C 380 Refrigerant Leak Detector

Best for: HVAC/R service, maintenance and troubleshooting.

Why pros like it: 15 inch gooseneck plus audible alarm and tricolour LED bar indicator.

“The leak is behind a wall/ceiling… I need proof without tearing everything up.”

Thermal imaging helps you spot temperature differences so you can narrow the search area before opening surfaces.

Testo 883 Thermal Imager

Best for: Plumbing leaks, roof leaks, building envelope issues.

Why pros like it: SuperResolution technology supports clearer thermal images for troubleshooting.

“I need to locate the exact section of pipe before I cut, no surprises.”

When access is the challenge, an inspection camera lets you confirm conditions inside walls, drain lines, or cavities and avoid unnecessary demolition.

RIDGID CA-350 Inspection Camera

Best for: Drain inspections, pipe routing verification, tight spaces.

Why pros like it:  Easily record still images and videos of problems in hard-to-reach areas.

“I found the leak, but I need to prove the repair and document it.”

In leak detection, finding the leak is only half the job. Pros often need to prove the system is now tight (and show it to a customer, inspector, GC, or internal QA).

Fieldpiece JL3KM2 Dual Port Manometer Probe Kit

Best for: Return static, supply static, total external static pressure, draft and gas pressure.

Why pros like it: Two probes capture more readings and provide live Job Link App viewing.