Sound occurs when the atmosphere leaks into a vacuum vessel or when a pressure vessel leaks to the outside atmosphere. sound's frequecy is related to the size of the orifice which sound passes through, but usually the frequency is about 40kHz.
eBay
Car Air Conditioner Leak Detector Test Car Air Conditioning Repair Fluorescent Oil UV Dye Light Leak Detection Tool 1/2/3pcs
Aliexpress UK
1 x Ultrasonic leak detector. It is very suitable for detecting cracks of pipes, valves, etc. Enough to emit frequencies the detector can pick up. (Only DY26). nitrogen(N), carbon dioxide(CO2) and steam.
eBay
77Pcs Automotive Air Conditioning Leak Test Kit Air Conditioning Leak Detector Repair Tool for Car Truck Auto A/C Compressor
Aliexpress UK
Frequency range: 40kHz±2kHz. This leak detector is designed to locate leaks in the pressure and vacuum system. This leak detector uses sensors and is characterized by small size and light weight. Turbulence generated by gas or air forced through a small office produces ultrasonic noise.
eBay
ANCEL S300 12V Car Smoke Leak Detector Built-in Air Pump Oil EVAP Pipe Leak Locator Smoke Generator Car Diagnostic Tool
Aliexpress UK
Sound occurs when the atmosphere leaks into a vacuum vessel or when a pressure vessel leaks to the outside atmosphere. sound's frequecy is related to the size of the orifice which sound passes through, but usually the frequency is about 40kHz.
eBay
60ml Car Air Conditioner Fluorescent Leak Detector Car Leak Detection Syringe For Car AC Auto Air Conditioning Pipeline Tracer
Aliexpress UK
If a container or pipe is filled with gas, when its internal pressure is stronger than the external pressure, due to the large internal and external pressure difference, once the container has a leak, gas will be flushed out of the leak hole.
eBay
Elitech CLD-100 Freon Leak Detector Halogen Gas Analyzer Car HVAC Refrigerant Leak Sniffer R134a CFCs HCFCs HFCs Gas Analyzer
Aliexpress UK
This Ultrasonic Leak Detector converts ultrasound signals produced by industrial machinery into easily recognizable audible sounds for a user to evaluate the condition of individual components. 20 to 100 kHz frequency response.
eBay
1set Car Combustion Leak Tester Tool Detector For Cylinder Head Gasket Combustion Gas Leaks Engine Checks Diagnostic Tools
Aliexpress UK
With the Ultrasonic Leakage Detector, it is applicable to Air leaks around door. With the Ultrasonic Leakage Detector, it is applicable to Air leaks around door & window gaskets & seals, Water leaks in roofs, Conduit & pipe identification, Door & trunk seals, Windshield leaks.
eBay
ANCEL S100 Car Smoke Leak Detector Diagnostic Fuel Pipe Leak Tester Vacuum Leakage Locator EVAP Vacuum Leakage Diagnostic Tools
Aliexpress UK
Sound occurs when the atmosphere leaks into a vacuum vessel or when a pressure vessel leaks to the outside atmosphere. sound's frequecy is related to the size of the orifice which sound passes through, but usually the frequency is about 40kHz.
eBay
12V Universal Easy Intake Adapter Automotive IInflatable Enclosed Air Cushion Smoke Leak Detector for Detect Fuel Leaks
Aliexpress UK