DY720 DC Electric Spark Detector

The DY720 DC Electric Spark Detector is a specialized instrument designed to inspect the quality of metal anti-corrosion coatings. It is suitable for testing coatings of various thicknesses, including enamel, fiberglass, epoxy coal tar, and rubber linings. If defects such as pinholes, bubbles, or cracks are present, the device emits a bright electric spark and an audible alarm to indicate quality issues.

Powered by a high-capacity, long-life NiMH battery, the DY720 is lightweight, eco-friendly, and rechargeable, making it ideal for outdoor operations. With an advanced and reliable design, it is widely used in industries such as chemicals, petroleum, rubber, and enamel manufacturing for metal coating quality inspection.

Detection Principle

The electric spark detector applies a controlled pulse high voltage to the surface of conductive substrate coatings. If the coating is too thin or has defects like exposed metal or pinholes, the high voltage creates a spark discharge through the air gap. This triggers the alarm circuit, producing a sound alert to indicate a fault in the coating.

Technical Specifications