What is the output voltage range for low-voltage (wet sponge) holiday detectors?

Low-voltage (wet sponge) holiday detectors typically operate within the voltage range of 5 to 120 V DC. This range is essential for ensuring the proper detection of holidays or discontinuities in coated surfaces without damaging sensitive substrates or coatings. The choice of voltage is crucial because it needs to be high enough to effectively identify defects but not so high as to cause harm to the material being inspected.

The other voltage ranges mentioned do not apply to wet sponge holiday detectors. For instance, a range of 1 - 10 V DC is generally too low for detecting coatings effectively. Similarly, while 50 - 240 V AC encompasses high voltage ranges suited for different applications, it exceeds the limits typically associated with low-voltage holiday detection. The 10 - 30 V AC range may also be inadequate for the intended detection purpose, as it does not reach the levels required for reliable performance. Hence, the selection of 5 - 120 V DC reflects the practical requirements for accurately assessing the integrity of protective coatings.