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sales@ndtone.comCorona 40Holiday Detector
Corona 40Holiday Detector
The Corona 40 is a portable pulsed high-voltage holiday detector for detecting pinholes, pores, cracks, leaks and other discontinuities in thick protective dielectric coatings, linings and membranes. It is designed for testing coatings from 0.5 to 25 mm thick.
Description
The Corona 40 is a portable high-voltage holiday detector designed for non-destructive inspection of protective dielectric coatings, linings and membranes. It is used to detect coating discontinuities such as pinholes, pores, cracks, leaks, tears and other defects that may expose the substrate and reduce corrosion protection.
The device provides an adjustable test voltage from 4 to 40 kV and is suitable for coatings from 0.5 to 25 mm thick. Interchangeable electrodes allow inspection of pipelines, tanks, vessels, metal structures and other coated equipment with flat, cylindrical or complex-shaped surfaces.
The pulsed high-voltage test method provides reliable defect detection while reducing the risk of excessive thermal impact on the coating. The Corona 40 is suitable for production inspection, installation control and in-service testing of protective coating systems.
Features
- High-voltage holiday testing of dielectric coatings from 0.5 to 25 mm
- Wide adjustable test-voltage range from 4 to 40 kV
- Reliable detection of pinholes, pores, cracks, tears, leaks and other coating discontinuities
- High test-voltage stability — within 5%
- Powerful test-voltage generator up to 50 W
- False-defect detection system
- Built-in test-voltage calculator based on coating thickness
- User calibration throughout the device lifetime
- Built-in defect counter
- Wide range of interchangeable electrodes for pipelines, tanks, vessels and complex geometries
- Operating temperature range from –40 to +50 °C
- Lightweight control unit — up to 650 g
- Up to 20 hours of autonomous operation
- Pulsed high-voltage inspection method
Basic technical characteristics
| Technical data | Corona 40 | Units |
|---|---|---|
| Minimum thickness of tested coatings | 0.5 | mm |
| Maximum thickness of tested coatings, at least | 25 | mm |
| Type of holiday detector | Pulsed | |
| Test voltage range | From 4 to 40 | kV |
| Pulse frequency | 50 | Hz |
| Weight of the control unit, maximum | 650 | g |
Delivery set
- control unit Corona 40
- case for control unit
- high-voltage handle VT-40
- ground wire with magnet and crocodile clip
- extension rod
- lead-acid battery
- fan electrode
- battery charger
- operating manual
Electrodes
Special electrodes can be made according to customer’s own specification.
Video materials
Corona Holiday Detectors
A brush (fan) electrode for holiday detectors
An extension rod for holiday detectors
A brush (hair) electrode for holiday detectors
A straight silicone rubber electrode for holiday detectors
Holiday testing using a rolling spring electrode
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