The Tinker & Rasor M/1 is a portable low-voltage wet sponge holiday detector designed for non-destructive inspection of thin-film protective coatings.
Using a wet sponge inspection method, the M/1 helps inspectors identify holidays, pinholes, voids, and other coating discontinuities before assets are placed into service.
Equipment Type: Holiday Detector
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The Tinker & Rasor M/1 is a portable low-voltage holiday detector designed for inspecting thin-film protective coatings without damaging the coating itself.
Unlike high-voltage holiday detectors that use spark testing, the M/1 uses a conductive sponge electrode and wetting solution to identify coating defects without damaging the coating being inspected.
Designed for coatings up to 20 mils thick, the M/1 can be used on both metal and concrete substrates. When the wetted sponge passes over a holiday, pinhole, or void, the circuit is completed through the conductive substrate, triggering an audible signal that alerts the inspector to the defect.
The Tinker & Rasor M/1 is commonly used for inspecting thin-film protective coatings on tanks, vessels, steel structures, concrete structures, and other coated assets. Its low-voltage wet sponge inspection method is designed for coatings up to 20 mils thick, making it a practical choice for coating systems that can’t be inspected using high-voltage spark testing.
The M/1 is frequently used during coating application projects, quality assurance inspections, maintenance programs, and acceptance testing. Because it provides non-destructive holiday detection, it is particularly well suited for applications where coating integrity must be verified without risking damage to the protective coating system.
Tinker & Rasor M/1 Technical Specifications
| Model | M/1 Holiday Detector |
| Detector Type | Portable low-voltage wet sponge holiday detector |
| Applications | Thin-film coating inspection and quality assurance |
| Compliance | ISO 14654, ISO 8289-A, ASTM G62, ASTM G6, ASTM D5162, BS EN ISO 28765, AMPP SP0188, TM0384, AS 3894.2, JIS K 6766 |
| Holiday Detection | Visual and audible alarms |
| Grounding Verification | Grounding confirmation feature |
| Audio Output | 3.5 mm headphone jack |
| Electrode Type | Wet sponge electrode |
| Design | All-in-one stick-style configuration |
| Power Source | 9V battery |
| Construction | Impact-resistant plastic case |
| Weather Protection | Sealed enclosure |
| Wand Material | Fiberglass |
| Inspection Method | Non-destructive wet sponge testing |
| Output Voltages | 9V DC, 67.5V DC, and 90V DC |
| Accuracy | ±5% |
| Coating Capability | Thin-film coatings up to 20 mils |
| Substrate Compatibility | Conductive substrates including steel and concrete |
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