Abstract: A leak detecting device comprising: a housing with gas inlet, a gas outlet, at least one pressure gauge for measuring the gas pressure supplied to the tested system, at least one flow meter for measuring the flow of the gas from the device to the tested system, at least one flow control valve to vary the gas flow through the device, an operating valve for permitting the flow of the gas from the device into the system to be tested. When said device is utilized, the inlet is attached to a pressure generating apparatus, the outlet is attached to the system to be tested, said pressure gauge showing the system testing pressure, and the flow meter indicates the flow of the gas through the device and the system being tested, thereby indicating the existence of any leakage and quantifying the total size of the leakage.

Abstract: A leak detecting apparatus is provided that tests for leaks in closed systems such as the air intake system of an internal combustion engine. The system connects to a conventional air supply that provides air under pressure. The air from the air supply is routed through a fluid tank where the air is directed against the fluid thereby generating fog. The fluid is preferably a mineral oil. The fog is routed out of the apparatus and is fed into the system for detecting leaks. Leaks are observed visually when the fog escapes from cracks or fissures in the system being tested. In order to aid in the observation of the fog escaping from the leaks, a light reflective pigment is added to the fluid thereby making the fog easier to observe upon the application of white light to the fog.

Abstract: A leak detecting apparatus is provided that tests for leaks in closed systems such as the air intake system of an internal combustion engine. The system connects to a conventional air supply that provides air under pressure. The air from the air supply is routed through a fluid tank where the air is directed against the fluid thereby generating fog. The fluid is preferably a mineral oil. The fog is routed out of the apparatus and is fed into the system for detecting leaks. Leaks are observed visually when the fog escapes from cracks or fissures in the system being tested. In order to aid in the observation of the fog escaping from the leaks, a light reflective pigment is added to the fluid thereby making the fog easier to observe upon the application of white light to the fog.