Ultrasound Leak Detection
of Microphonics

Microphonics Automotive Diagnostic System is a hand-held precision test device designed to allow professional mechanics the ability to quickly and easily detect and diagnose various automotive related operating problems. Microphonics will allow you to locate the source of a problem within 1/8" of its origin.


BRAKE SYSTEM: A MICROPHONICS detector can help locate leaks quickly in both vacuum assisted and air brake systems. In many cases leaks can be detected from a considerable distance. After building up full pressure, a casual sweep of the vehicle trom one end to the other using the receiver can often locate the leak. Use of the headphones will also reduce noise interference from the shop. If the first sweep does not locate the leak, trace out the entire air system piping at close range (1-2 feet) with the receiver. Once the general area of the leak has been determined, the receiver probe is very useful to pinpoint the exact location of the leak. For effectiveness, be sure that pressure is maintained in the brake system during the entire search. If no leaks are discovered, check the air horn, windshield wiper and other air-actuated equipment. Leaks in these accessories can produce abnormal gauge drop.
TIRES: For heavy trucks, many mechanics check tires for adequate pressure by striking the tire with a hammer and noting the rebound and sound. However, this procedure doesn't find leaks. A sweep with the MlCROPHONICS receiver will locate even the smallest of leaks. The receiver normally finds leaks of sufficient magnitude before they cause downtime on the highway. The detection of even one leak may save the cost of original investment in the equipment. Savings realized by preventing the loss of a tire (on duals, a second tire), possible damage to the driveline components, and road service costs to replace the tire can be significant.
LEAKING VALVES: Leaking intake valves can be checked for defects by using the MICROPHONICS receiver and headphones with the engine running. All valves would emit a sound in a very close meter and sound pattern when the probe is placed on the intake manifold opposite the intake port. A suspected valve can then be positively checked, with the engine off, by bringing that particular cylinder to full compression and placing the probe on the valve stem. The "hiss" of escaping gas across the valve seat will be distinctly audible on the leaking valve. Using the same procedure can check exhaust valves, however, signal intensity will be much greater.
COOLING SYSTEM: The presence of air in the cooling systems can cause hot spots, resulting in burned liners and heads in a very short time. Since all cooling systems are under pressure, coolant must go out in order to allow the air to get in. Aeration detection equipment gives the signal that air is in the system, but not the location of the leak. Using the MICROPHONICS receiver in suspect areas, such as the head gasket, the water pump and injectors, will usually detect the exact source of the leak. The "bubbling" of air in the cooling system is very noisy and usually enables the exact problem to be determined. By detecting an unsuspected trouble point unnecessary labor can be eliminated. All such tests should be conducted while the engine is idling. Internal leaks may also be pinpointed immediately after shutoff when internal pressure is at its highest point. Headphones should be used for this test.
EXHAUST SYSTEMS: With the engine idling, pulsation in the exhaust system can be detected with the receiver. Leak points normally give off much louder and sharper sound. Headphones are essential for this procedure.
WHEEL BEARINGS: A ball or roller bearing that is in good condition and adequately lubricated normally produces a soft "whirring" sound via the earphones. Lack of lubrication introduces scraping sounds. Flat spots or nicks cause a grafting or clicking noise, depending on the speed of the rotation and the degree of damage. F or the best result, the probe should touch the spindle while spinning the wheel.
DRIVE TRAIN BEARINGS AND GEARS: By using the receiver with headphones, it is possible to determine which gear or bearing in a drive is faulty. This should be done by allowing the drive train to run with the wheels off the ground. The receiver and headphones are the search combination to discover the point of greatest noise generation.
HYDRAULIC SYSTEMS: Partially blocked or bypassing valves in high-pressure hydraulic systems can be difficult and costly to find with conventional methods. Since hydraulic systems employ very high pressures, the intensity of the ultrasonic sound given off by an internal leak is extremely high and easily detected by the MICROPHONICS receiver.
ELECTRICAL SYSTEMS: Separations in high-tension spark plug wire conductors can be quickly identified from the corona discharge "snapping" sound emitted. The same applies to arcing within electrical motors and accessories.
BODY WEATHER-STRIPPING, SEALS, FUEL TANKS: The MICROPHONICS transmitter, placed inside a vehicle, fuel tank or any enclosure, can easily locate leaks in weather-stripping, seals, or the structure itself. This is extremely useful for inspecting fuel transporters and storage tanks and will save many hours of downtime and labor. The MICROPHONICS detector will become one of the most valuable tools in your maintenance operation.

Dimensions: Width: 2 1/2"
Depth: 1 "
Length: 5 1/4"
Weight: 2 lbs. (Complete Kit, in case)
Housing: Impact & Chemical Resistant Nylon Low Battery Indicator: Flashing LED
Battery Life: Approx. 20 Hours
Power Requirement: Standard 9- Volt
Power Consumption: 48mA. typical
Frequency Response: 36,000Hz-44,OOOHz
: Solid State, IC and SMT
Headphone: Variety of styles to fit your needs Headphone Connector: 3.5m phone plug
Operating Temperature Range:
-10 degrees C to +60 degrees C

- Precision system allows for quick and accurate
  detection of problems

- Pinpoint the problem source & fix it
  right the first time

- Eliminates unnecessary money spent
  on misdiagnosing a problem

  Gayle Technology Inc.     Press  



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