These components are also known as wet sponge Testers, low Voltage holiday Detectors, low Voltage multi-hole Detectors, and pinhole Detectors

AS3894.1-2002 (Wet Sponge Test); ASTM G62-07; ASTM G60-07; ASTM D5162-08; Nace Standard: RP0274-2004 & SP0188-2006
Use the wet sponge method to probe the pinhole coating
LCD Voltage display
A 9-volt battery is installed inside
The LCD display is displayed when the battery is low
Sound and light fault alarm
Telescopic handle for user comfort (up to 1.2 m in length)
Long probe head (230*40mm) And wider sea surface can be tested faster
Headphone socket allows testing in noisy environments (headphones not supplied)
Kit composition
Parts and handles include sponges
Belt/pocket clip
Seven meters of ground wiring and clips
valise
Instruction manual with calibration certificate
托马斯·贝利