1. General Description
* Widely used in ship, automobile, chemical
manufacture, metallurgy, machine, household appliance and many other  fields.
It can pick up and amplify the weak audio
signals via a sensitive piezoelectric sensor,
and distinguish the normal/abnormal signal
and its location.
*  Designed to help locate the source of excess
bearing and machine noise easily at low
cost. It is an ideal easy to use listening
device for mechanical generated noise in all
types of applications.
*  Used to quickly locate the source of engine
noise such as piston slap, worn gears and
bearings, damaged valves, water pump
failure, blown gaskets. Also useful tracking
down dashboard rattles and squeaks.
2. Main applications
* Rapidly detect the machine noise from a 
diesel engine, an air cylinder or an 
automobile, and exactly find out the
malfunction position.
* Used to check the piston slap, worn gears,
damaged valves and bearings, water pump
failure  in industry
* Monitor the automatic assembly line to 
ensure proper operation.
*  Identify the abnormal noise from an engine
 or a motor to avoid  accident.
* Monitor the working of all kinds of 
axletrees.
*   Monitor the working of a ship or vessel.
*   Used in chemical industry to check whether
the liquid in a pipe is flowing or blocked.
*   Used in the maintenance of various vehicles
and household appliances.
3.   Specifications
Frequency range: 10-10KHz
Input Impedance: >20M
Ambient Noise permitted: 100dB
Working Temperature: -10~60℃
Power supply: 4x1.5 AAA batteries
Size: 156×67×28mm
Weight: 270 g(including sensors)