This instrument is one of the novel instruments with high stability and high anti-interference in the world at present. It can conveniently and accurately find out the direction, depth and precise position of the leakage point of the underground pipeline and the insulation anticorrosive layer without digging up the soil, so that the whole pipeline surface is no longer subjected to the pain of cracking the soil. It is a kind of detection instrument for the construction quality inspection and maintenance inspection of the underground pipeline anti-corrosion layer in the oilfield, chemical industry, oil transportation, gas transportation, hydropower and other departments.

【 Feature 】

1, the instrument power supply adopts the reliability of the original switching power supply, the implementation of intelligent fast charging when charging, no manual control.

2, the instrument voltage, output current signal can be automatically converted.

3, DC power supply and AC power supply can be automatically converted.

4, all the instruments adopt high anti-interference lines, especially useful for the survey and maintenance of urban pipe networks.

5, the transmitter adopts liquid crystal display to improve the output accuracy and the performance of the instrument.

6, the instrument special protection automatic adjustment function, to overcome the fatal weakness of similar products.

7, the line of the instrument adopts modular structure and three-defense design, which greatly improves the field service life and reliability of the instrument.

【 Main technical indicators 】

1. Leak detection accuracy: ≥0.25mm2;

2. Position deviation: < 20cm;

3. Accuracy: > 98%

4 Scope of application: various diameters of oil, gas, water and other underground anti-corrosion metal pipelines.

(A) transmitter technical indicators:

1. Transmit power: ≥25W, adjustable;

2. Transmission frequency: 1K±0.1Hz, beat frequency 1-2Hz;

3. Output impedance matching: 0-100Ω;

4. Launch distance: 50m-5Km (5 km away can be moved step by step);

5. Working current: ≤3A, 1-3A adjustable;

6. Working power supply: 12V (cadmium-nickel battery or car power supply);

7. Weight: 2.8Kg(excluding battery weight);

8. Dimensions: 99×220×220

(2) Technical indicators of the detector:

1.Sensitivity: 0.1mV;

2. Strike position deviation: < 10cm;

3. Detection depth: ≤5m;

4. Power supply: 6V cadmium-nickel battery;

5. Weight: 0.9Kg;

6. Overall dimensions: 165×135×69.

(3) Leak detector technical indicators:

1. Leak detection accuracy: ≥0.25mm2;

2. Leak detection depth: ≥0.5m;

3. Position deviation: < 20cm;

4. Power supply: 6V cadmium-nickel battery;

5. Weight: 0.9Kg;

6. Overall dimensions: 165×135×69.

[Detection principle and method]

By sending a 1KHz electromagnetic wave signal to the underground pipeline, the detector uses the principle that when the probe is perpendicular to the ground plane of the magnetic field line, the received signal is small (almost zero) to determine the direction and depth of the pipeline.

Leak detection principle:

By sending an AC signal source to the underground pipeline, after the anti-corrosion layer of the local pipeline is corroded, the metal part and the earth phase short-circuit, forming a current loop at the leak point, the resulting leak point signal radiates to the ground, and the radiation signal is large above the leak point, according to this principle, the leak point can be accurately found.