An ultrasonic leak detector identifies refrigerant leaks by sensing the high-frequency sound waves (typically 40 kHz) emitted when pressurized gas escapes through small orifices. These devices are highly sensitive, detecting leaks as small as 0.25 ounces per year, and work independently of refrigerant type, making them suitable for all modern refrigerants including A2L hydrocarbons.
Technical Operation
Ultrasonic detectors convert high-frequency sound signals inaudible to human ears into audible tones or visual displays. The device includes a receiver tuned to narrow frequency bands that reject ambient shop noise, improving accuracy. Sensitivity adjusts to match leak size, with finer control for pinpointing exact leak locations. Battery runtime typically ranges from 20 to 40 hours depending on usage intensity.
Field Applications
Ultrasonic detectors excel at locating leaks in noisy environments and are particularly useful for pinpointing small leaks that might be difficult to locate with electronic sensors. They detect leaks without refrigerant saturation issues common in service shops with multiple active systems. Technicians employ ultrasonic detection for preventive maintenance surveys, warranty inspections, and difficult diagnostics. These tools complement electronic detectors as part of comprehensive leak detection protocols.