Tinker & Rasor M/1 Holiday Detector – Low Voltage Wet Sponge Testing

Description

The M/1 Holiday Detector from Tinker & Rasor is a stick-type, low voltage wet sponge holiday detector designed for inspecting thin film coatings up to 20 mils on conductive substrates such as steel and concrete. With selectable voltage outputs of 9V, 67.5V, and 90V, this instrument complies with numerous international standards including ASTM, ISO, and AMPP protocols for low-voltage coating inspection.

Built for both precision and portability, the M/1 Holiday Detector features visual and audible holiday indicators, two resistance settings (80Ω for metal and 90Ω for concrete), and onboard calibration verification for reliable performance in the field. Housed in an impact-resistant, weather-sealed case, the unit is engineered for rugged environments and long-term durability.

The complete kit includes everything you need for immediate deployment—ground cable, wetting solution, sponge assembly, calibration certificate, and a carrying bag—all powered by a standard 9V battery for true on-the-go testing.

Product Benefits:

• Accurate Detection: Selectable outputs (9V, 67.5V, 90V) for testing a range of coating types and thicknesses
• Complies with Global Standards: Meets ASTM G62, ISO 14654, ISO 8289-A, EN ISO 28765, and more
• User-Friendly Design: Stick-type form factor for single-operator use with minimal setup
• Reliable Readings: Audible and visual holiday detection indicators
• Concrete & Steel Ready: Dual resistance modes (80Ω for metals, 90Ω for concrete)
• Portable & Rugged: Weather-sealed, impact-resistant housing with fiberglass extension wand
• Battery Powered: Operates on a standard 9V battery, with headphone jack for noisy environments
• Onboard Calibration Verification: Maintain compliance without guesswork

Typical Applications:

• Inspecting thin film coatings on storage tanks, piping, and vessels
• Testing concrete coatings in wastewater facilities or containment areas
• Quality assurance for coatings in power plants, infrastructure, and OEM operations
• Field-ready solution for AMPP SP0188 and ASTM D5162 compliance audits

What’s Included in the Kit:

• M/1 Instrument with installed 9V battery
• 25′ Ground Cable
• Water Wetter Wetting Solution (4 oz.)
• 18″ Extension Wand
• 16″ Wand with Red Cable and Cable Adapter
• 6″ x 3.5″ x 2″ Sponge and Yellow Holder
• Sponge Backing Plate and Black Knob
• T&R Screwdriver
• Canvas Carrying Bag
• Instruction Manual
• Certificate of Calibration

Technical Specifications:

Output Voltages:

• • 9V DC, 90kΩ ±5%
  • 67.5V DC, 80kΩ ±5%
  • 67.5V DC, 90kΩ ±5%
  • 90V DC, 400kΩ ±5%

Sensitivity Range: Designed for coatings up to 20 mils

Standards Compliance: ASTM G62, ISO 14654, ISO 8289-A, BS EN ISO 28765, AMPP SP0188, and others

Dimensions & Weight: Lightweight and ergonomic stick-type design

Ensure the integrity of your thin film coatings with the Tinker & Rasor M/1 Holiday Detector—an industry-trusted solution available now from Unconventional Solutions.