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LBT-022A Geomembrane High-Voltage Spark Leak Detector

Name: LBT-022A Geomembrane High-Voltage Spark Leak Detector
Brand: Laibote (Tianjin) Testing Machinery
Availability: InStock

The geomembrane high-voltage spark‑testing leak detector is suitable for leak‑detection and integrity assessment in landfill liners, tailings‑dam seepage and damage inspections, landscape‑lake leakage monitoring, aquaculture‑pond leak detection, sewage‑storage‑tank leak inspections, and other construction‑related leakage‑prevention applications.

Category:

Geosynthetic Testing Equipment

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E-mail:

lbt@lbt.ltd

WhatsApp:

+86-15102211717

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LBT-022A Geomembrane High-Voltage Spark Leak Detector

Description

Product Introduction:

The geomembrane high-voltage spark‑testing leak detector is suitable for leak‑detection and integrity assessment in landfill liners, tailings‑dam seepage monitoring, landscape‑lake leakage inspection, aquaculture‑pond sealing verification, wastewater‑storage‑tank leak detection, and other construction‑related leakage‑prevention applications.

Product Features

This device is a pulsed high‑voltage instrument designed for leak detection. Compared with conventional DC spark testers, it reduces spark‑induced damage to materials, features an enhanced leak‑memory function, and improves operator efficiency. The pulsed spark tester can be used to assess the quality of coatings such as geomembranes, epoxy coal‑tar linings, and rubber linings, regardless of their thickness. When material defects—such as pinholes, blisters, fissures, or cracks—are present, the instrument emits a bright electrical spark and triggers both audible and visual alarms. Powered by a rechargeable battery, it is particularly well suited for field operations. With a robust and reliable design, this instrument finds wide application in the chemical, petroleum, rubber, and enamel industries, serving as a tool for evaluating the quality of metallic anti‑corrosion coatings.

Technical Specifications:

Parameter Category	Parameter content
Thickness measurement	0.2~15mm
Output high voltage	1.5 kV to 31.5 kV (continuously adjustable in steps), with a three-digit LCD display showing the output high voltage.
Leak point counting function	Smart counting, with a maximum memory of 999 entries.
Defect indication	Dual audio and visual alarm
DC power supply	12V
Power consumption	Approximately 60,000, undervoltage indication function
Host volume	250×210×90mm
Host weight	1Kg

Detection Principle and Structural Composition

1. Detection Principle: The electrical spark detector applies a pulsed high voltage to the surface of the anti-corrosion coating on various conductive substrates. If the coating is too thin, contains exposed metal, or has pinhole defects allowing gas leakage, the pulsed high voltage will cause air-gap breakdown, resulting in spark discharge. Simultaneously, this generates a pulse signal that triggers the alarm circuit, causing the alarm device to sound, thereby achieving the purpose of coating inspection.

2. Structural Composition: The instrument consists of three main components: the host unit, the high-voltage probe, and the probe electrode.

Host section: Includes an integrated control circuit, an audible alarm device, and other components. The names of the components on the front and rear panels of the host are shown in the figures below.
High‑voltage probe assembly: It houses a high‑voltage generator, a high‑voltage output push‑button switch, and lead wires, among other components. The names of the individual parts of the high‑voltage probe are shown in the figure.

(3) Probe section: available in two types—straight probe brush and flat probe brush.

Testing method:

1. The pulse electrical spark method shall be capable of detecting leakage defects on the impermeable geomembrane that are no smaller than 1 mm in size.

2. Steps for pulse spark detection: site preparation, equipment testing and calibration, actual detection, re‑testing, and report compilation.

3. During leak‑detection and damage‑assessment using the pulsed electrical spark method, the upper surface of the geomembrane shall be smooth, dry, exposed, free of debris, and electrically insulated. The geomembrane must be a conductive material specifically designed for this purpose, with the conductive layer installed facing downward.

4. For calibration of the pulsed electrical spark detection system prior to testing, either actual breach holes with a diameter of approximately 1 mm or artificially simulated breach holes may be used. To simulate artificial leakage breaches, a metallic conductor no larger than 1 mm in diameter should be inserted through the impermeable geomembrane, with one end connected to the underlying foundation layer beneath the geomembrane and the other end exposed on the surface of the geomembrane.

5. Conduct point-by-point detection according to the planned survey network layout, while monitoring electrical sparks and the acoustic signals emitted by the detector, to identify the location of leaks or damage.

The procedure for the spark test is as follows:

Place a copper conductor along the upper edge of the geomembrane overlap. Cover the conductor with an extrusion weld, and during welding, use a screwdriver or other tool to keep the conductor centered in the weld seam.

At the end of the extruded weld seam, one end of the wire shall extend approximately 50–70 mm beyond the seam to serve as the electrode for the electrical spark. The wire need not be coiled, but it must remain continuous along the entire length of the weld.

The test voltage of the testing apparatus is 20,000 volts.

During testing, connect the grounding terminal of the test device to the exposed end of the wire in the weld seam, and slowly (at approximately 5 meters per minute) pass the copper brush along the entire length of the weld. The copper brush must remain in contact with the weld. If a defect is present, an audible signal will sound; move the copper brush about 2 cm away from the weld, and the electrical sparks between the defect and the brush will indicate the precise location of the flaw.

Any areas where bubbles appear during testing must be marked, reworked and repaired, and then tested again.

After passing the test, trim off the exposed copper wire, then grind the area and solder it using extrusion welding.

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FAQs

Do you supply full-set testing instruments for asphalt and geotechnical engineering projects?

We offer complete lab solutions including asphalt viscosity tester, asphalt rutting tester, geotextile permeability tester, low-temperature flexibility tester and concrete/cement test equipment, covering raw material detection for road, water conservancy and construction engineering projects

Can you customize fixtures or test machines based on our special test requirements? How about after-sales service and warranty?

We provide non-standard customization of test equipment and customized fixture clamps according to customers’ specimen size and test standards. All our testing machines enjoy 12-month factory warranty; overseas customers get remote online debugging guidance, spare parts supply and technical operation training. Our products have been exported to over 70 countries globally

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Does your pipe pressure burst testing machine control test temperature automatically? What’s its main application?

Yes, the constant-temperature circulating system keeps stable test environment during long-time hydrostatic resistance and instant burst pressure measurement of thermoplastic pipes. It complies with GB6111 standard and serves raw material inspection, new product R&D for plastic pipe manufacturers, third-party testing labs and university laboratories.

What kinds of pipes fit your ring stiffness tester? Can it do long-term creep testing?

This equipment is designed for HDPE, PVC corrugated pipes, plastic drainage pipes and various plastic tubular products. Apart from ring stiffness, ring flexibility and flattening tests, it supports continuous long-term creep tests up to 1000 hours (42 days) as required by industry specifications, widely used for pipe factories and construction quality inspection institutes.

What test items can your WDW series computer-controlled electronic universal testing machine complete? Which international standards can it meet?

Our WDW universal tester is applicable for tension, compression, bending, shearing and peeling tests of metal, plastic, rubber and composite materials. It supports test procedures in accordance with GB, ISO, ASTM, DIN, JIS multiple domestic and global standards. Equipped with high-precision servo drive and dedicated test software, it automatically collects, calculates and exports test data including tensile strength, elongation at break and elastic modulus.

Customer Reviews

Southeast Asia Rubber & Polymer Factory｜Purchase: Vicat Softening Point & Tensile Testing Machine

From Tanaka Hiroshi, R&D Supervisor, Indonesia rubber materials enterprise

2026.06.05

★★★★★

“Laibote’s Vicat softening point tester and electronic tensile machine have been applied to our raw material incoming inspection and new formula development for over one year. High testing accuracy effectively controls our product defect rate. What impresses us most is their responsive after-sale service; technical staff reply our troubleshooting requests within 24 hours even for time zone differences. Compared with expensive European brands, Laibote’s equipment balances quality and price excellently, we plan to expand procurement of auxiliary testing instruments next quarter.”

Middle East Construction Lab｜Purchase: Universal Electronic Testing Machine & Geotextile Test Equipment

From Mohamed Kareem, Lab Manager, UAE third-party construction inspection institute

2026.06.05

★★★★★

“We compared multiple testing equipment brands from Europe and China before cooperating with Laibote. Their WDW universal tester and full-set geotextile testing instruments meet local construction testing standards perfectly. Custom fixtures tailored per our specimen specifications save much testing time. Pre-sale technical communication was patient and professional; engineers provided online operation training after goods arrived. Stable machine performance greatly improves our laboratory’s detection efficiency, we are satisfied with cost performance and overall service.”

European Plastic Pipe Manufacturer｜Purchase: Ring Stiffness & Hydrostatic Burst Tester

From Thomas Bennett, Quality Director, UK plastic pipe factory

2026.06.05

★★★★★

“We have purchased two sets of pipe testing equipment from Laibote (Tianjin) for 18 months. The ring stiffness and hydrostatic burst testing machines run stably for daily batch inspection, test data matches ISO standard requirements precisely, and the intelligent test software is easy for our operators to master. Their after-sales team offers timely remote technical guidance whenever we have operational problems, spare parts supply is efficient. We have arranged a second bulk order for our new production workshop and will recommend Laibote’s testing machines to our industry partners across Europe.”

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