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Tech Data
Tech Data
Parts List
Parts List

Did you know?

The Model M-1 and M1-AC meets the requirements for NACE RP0188 and ASTM and ISO standards.

Model: M/1 Low Voltage Holiday Detector


  • Use on thin film coatings on conductive substrates such as tanks, concrete, etc.


  • Conforms to standards for low voltage holiday detectors, such as NACE International RP0188


  • Recommended Annually


  • Outputs: 9v, 67.5v, 90v

  • 80 ohm. Resistance for coating on metal

  • 90 ohm. Resistance for coating on concrete

  • (Factory setting is 80 ohm. See Instructions for information on changing setting to 90 ohm)


  • 5' x 4' x 2' Case. 1 lbs. (127mm x 101mm x 50.8mm, 45kg)-Instrument in case

  • 20" x 5.5" x 4", 3 lbs. (508mm x 139.7mm x 101.6mm, 1.35kg)-Shipping

Model: M/1 Low Voltage Holiday Detector

The M-1 is known Worldwide as the best choice for the inspection of thin film coatings (0 to 20 mils). The M-1 now uses a 9v battery which can be replaced without opening the instrument case. With on-board calibration verification, the M-1 can be checked in the field with no other test apparatus needed. An LED lights on the front panel when the unit is in calibration and when a holiday is detected. The M-1 comes complete ready go to work right out of the box. Headphones may be used in noisy environments that drown out the normal audio signal.

Model: M/1 Low Voltage Holiday Detector

Model: M/1 Low Voltage Holiday Detector


Stick Type Low Voltage, "Wet Sponge" Holiday Detector

New Updates Features

  • Outputs: 9v, 67.5v, 90v

  • Power LED

  • Audible & Visual holiday detecting indicators

  • 80kΩ - 90KΩ resistance

  • On-board calibration verification

  • 3.5mm Headphone jack

  • Battery operated (9v) 

The Model M/1 kit includes:

  • M1 Instrument

  • 9v battery (installed)

  • 15’ Ground Cable

  • Wand, 16" with red cable

  • Wand, 18" extension

  • Sponge electrode 6" x 3.5" x 2" (Ships Compressed, add water)

  • 4 oz. Bottle of "water wetter"

  • Instructions Manual

  • Certificate of Calibration

Ease of use makes the M-1 the Professionals’ choice.

Unpacking M/1 Low Voltage Holiday Detector

Model: M/1 Low Voltage Holiday Detector

M1 Kit Replacement Accessories:

  • 085-155 M/1 Instrument 

  • 026-101 Ground Cable 15' (4.5720m)

  • 049-014 Water Wetter Wetting Solution, 8oz.

  • 028-086 CANVAS BAG

  • 177-070 Wand 18" extension 

  • 177-075 Wand, 16" w/red cable 

  • 055-882 Electrode, Sponge, 6" x 3.5" x 2" 

  • 076-050 Sponge Holder 

  • 094-030 Sponge Holder Knob 

  • 014-195 Sponge Backing Plate

  • 010-007 Battery, 9v

Previous Version (Old Style Red/Black box) M/1 parts:

177-071 Wand with red cable 

026-017 Ground Cable, 15', Black

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