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0 reviews | Model: Tinker & Rasor M/1
Low Voltage Holiday Detector (Wet Sponge Type)
Your Price: $465.00
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The Model M/1 Holiday Detector is a highly sensitive device designed to locate holidays (pin holes, voids, etc.) in thin film protective coatings of relatively high electrical resistance when such films are applied to the surface of material of low electrical resistance. In these applications, such as painted metal surfaces, the Model M/1 Holiday Detector will locate these points very accurately with an audible and visual signal. This method of inspection of thin film is a non-destructive test and will not injure the protective coating. The Model M/1Holiday Detector consists of a portable battery powered electronic instrument, a wand handle, and sponge assembly (open cell sponge ships compressed, will expand with water), and ground wire. The instrument is housed in a sturdy plastic case with provision for attachment of optional headphones.
New Sponge and Wand materials - Thick sponge material, Very strong, lightweight Wand.
The detector is a “non-destructive wet sponge" type holiday detector. The basic electronic design of the Model M/1 Holiday Detector is that of a very sensitive circuit which is energized by one 9v battery. When current of 500 or 700 (+/- 10/%) micro-amperes flows in the circuit, an audible and visual signal is actuated. The exploring electrode is open-cell sponge material and is conductive when saturated with a wetting solution. The sponge electrode is attached to the non-conductive wand handle by means of the bolt with knob, plastic sponge holder and backing plate.
The M/1 is powered by a replaceable 9v battery. The battery is easily accessed by unscrewing its door on the top panel of the device.
The protective coatings should be dry and free of all contamination prior to electrical holiday testing. Proper curing and drying time of the protective coating must be established prior to conducting electrical holiday testing. The dry film thickness should not exceed 20 mils when electrical holiday testing is done with the low voltage Model M/1Holiday Detector. Film thickness should be determined with a nondestructive dry film thickness gauge to make sure limits are not exceeded. Special Note: Ordinary tap water will generally suffice to dampen the sponge electrode, provided the protective coating thickness does not exceed 10 mils. The factory recommended practice is to use a wetting agent at all times, regardless of coating thickness up to 20 mils. The low voltage holiday detector is not recommended for coatings greater than 20 mils of thickness.
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