Holiday Detector Model AP/W

Holiday Detector Model AP/W

Tinker & Rasor Hoilday Detector Model AP/W

Model AP/W

High Voltage, Pulse Type D.C. Holiday Detector

General Description

The Tinker & Rasor Model AP/W Holiday Detector supplies a range of output voltages suitable for the inspection of almost all protective coatings including thin film epoxies, vinyls, polyethylenes, etc. and thicker coatings such as hot applied coal tar, asphalt and heavy mastic materials. It is adaptable for use on both large and small diameter pipe as well as flat surfaces when such surfaces are coated with a high electrical resistant material and the surface beneath the coating is electrically conductive. It operates well on damp surfaces, so is desirable where humid conditions prevail.

Interchangeable PowerPak plug-in pulse transformers each develop six fixed output voltages, which are selected through externally mounted switch. The PowerPaks becomes an integral part of the wand assembly and can be interchanged in a matter of seconds.

Power to the instrument is furnished by a sealed, rechargeable, nickel cadmium battery which requires no maintenance other than recharging. A single charge is suitable for a full day’s work.

Weighing only eight pounds, the detector can be comfortably belt-mounted or carried by the handle. When faults or foreign particles in the protective coating are encountered by the inspection electrode, a distinctive audible signal heard.

Typical applications are checking coatings on pipelines (internal & external), tanks, concrete, sewers, and manholes.


  • Output voltages from 900V to 35 kV
  • Interchangeable PowerPaks, each with six (6) outputs determine range.
  • Portable, belt-worn unit.
  • Rechargeable 9.6V NiCad battery.
  • Audible holiday indicator.
  • Rugged injection-molded resin case.
  • Specified and approved on specs around the world.
  • Conforms to NACE International RP0188, RP0274, RPO490.

Tinker & Rasor Hoilday Detector Model AP/W Kit

The Model APW comes complete in kit form, including:

  • Instrument with Battery
  • Extra 6 volt sealed lead acid rechargeable battery
  • Battery Charger
  • Battery Tester
  • 20′ Ground Cable
  • 5′ High Voltage Cable
  • 18′ Wand with Electrode Connector and HV Cable
  • 18′ Extension Hnadle
  • Operators Belt
  • Carrying Case
  • Operators Manual
  • PowerPak*
  • Electrode*

*Includes one of four available PowerPaks
*Electrode choices are:

  • Full Circle Spring Electrodes for 2″ to 36″ pipe diameters
  • Half Circle Spring Electrodes for 2″ to 8″ pipe diameters
  • Silicone-Rubber Brush Electrodes in 2″ to 8″ widths

You may choose one electrode per instrument, in the size ranges listed. Other sizes are available for additional cost.


Output voltages 0.9-3.4 kV, 3.5-10 kV, 6-16 kV, 12.5-35 kV
Environmental -10?C to 50?C (14?F to 122?F)
Dimensions, carrying case 41″ x 18″ x 8″ (104 x 46 x 20 cm)
Weight, carrying case 35 lbs (16 kg)
Dimensions, Instrument 6.75″ x 8.5″ x 3.5″ (17.2 x 21.6 x 8.9 cm)
Weight, instrument 8 lbs (3.6 kg)
Weight of kit depends on choice of electrode.

Model AP/W PowerPaks

Tinker & Rasor Hoilday Detector Model AP/W PowerPaks The output voltage of the Model AP/W depends on the PowerPak attached to the instrument. Each PowerPak has a set of six switch-selectable ranges, as shown in the table.


PowerPak Output Voltages
in kV
Part No. Position L Position 2 Position 3 Position 4 Position 5 Position H
123-034 0.9 1.4 2.0 2.5 3.0 3.4
123-053 3.5 5.0 6.0 7.5 8.5 10
123-036 6.0 8.0 10.0 12.5 15.0 16.0
123-037 12.5 17.5 20.0 27.0 31.0 35.0

Carrying Case

Tinker & Rasor Hoilday Detector Model AP/W in case

The carrying case is included with the Model AP/W as well as high voltage holiday detectors, Models APS and AP.

The carrying case is made of light resin materials and is weather and dust sealed. Custom foam inserts keep the instrument and all components safe and secure during shipping and handling.

The inline wheels and padded handles make for easy mobility, and its streamlined size makes it easy to store on the truck or in the shop. The latches are strong but easy to open, with a push button lock on each. The case has molded lock catches for your own padlock or other locking mechanism.

Holiday Detector Model AP/W

Holiday Detector Model AP/W

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