Series ultrasonic leak detector

Series ultrasonic leak detector

Technical Principle

Ultrasonic waves are sound waves with frequencies higher than 20kHz, which are generally not directly audible to the human ear. Compared with low-frequency sound signals, high-frequency ultrasonic signals have: high frequency, small wavelength, good directionality, and are generally considered to propagate in a straight line; Poor penetration performance, difficult to penetrate obstacles; The attenuation is faster, and the closer to the sound source, the stronger the signal. These features make it easier for ultrasonic leak detectors to locate and locate the location of sound generation, i.e. the sound source.

When a compressed gas system leaks at a certain location, that is, when the gas passes through the leak hole from high pressure to low pressure under the action of pressure, turbulence is formed at the leak location due to the irregular disturbance of gas molecules. Turbulence generates a wide frequency sound wave signal, known as "white noise", which contains strong ultrasonic signals. By utilizing the directional and easy to locate characteristics of ultrasound, as well as its rapid attenuation in air, the stronger the signal directly facing the leak location, and the closer the signal is to the leak location, the stronger the signal. Therefore, the HGC-100 ultrasonic leak detector can quickly and conveniently detect and locate specific leak points.

The HGC-100 ultrasonic leak detector uses an ultrasonic sensor to convert the received ultrasonic signals propagating in the air into audible sound signals through the "heterodyne method", which can be listened to through external headphones or speakers. At the same time, the instrument pointer displays the strength of the ultrasonic signal. The receiving frequency of HGC-100 ultrasonic leak detector is 20KHz to 120kHz (continuously adjustable). In some environments with a lot of interference, frequency modulation can be used to receive ultrasonic signals concentrated at a certain frequency while shielding excess noise.

As one of the methods for leak detection, ultrasonic leak detection has the following advantages: it does not require any consumables; Easy to operate, fast detection speed, and personnel do not require excessive training; Ultrasonic testing, as a non-destructive testing method, has no impact or damage to the tested object; In most cases, it can be detected without stopping the machine, which does not affect the normal operation of the equipment; Suitable for leak detection in all compressed gas systems.

Technical parameters of HGG-100 series ultrasonic leak detector

1. Appearance: Convenient for handheld testing

2. Shell material: aluminum alloy, ABS plastic

3. Circuit: Solid state analog heterodyne receiver with temperature compensation

4. Frequency: Continuously adjustable from 20 kHz to 120 kHz, converted into audible audio sound from 50 Hz to 3 kHz

5. Probe: pluggable, equipped with 3 piezoelectric air ultrasonic sensors

6. Earphones: Luxury noise cancelling headphones

7. Display: 0 to 100 scale pointer display

8. Battery: Rechargeable battery

9. Weight: Host 0.75kg

10. Warranty: Host for 5 years

11. Modes: Real time, Average, and Auxiliary