MODEL 673Wet Sponge 67.5V 1-20 Mils (0 – 500 μm) for Paints and Epoxy Paint Coatings
The Model 673 Wet Sponge Holiday Detector for Plant or Stationary Operations is highly sensitive and accurate. A uniform coating of only one mil of paint or other non-conductive material over a metal surface is sufficient to repel a small current flow. If a pin-hole holiday is encountered, moisture from the sponge will seep into the hole and create a free path for electrical flow, activating the signal horn.
For coatings 1 to 10 mils thick, ordinary tap water can be used to wet the sponge. For coatings of 11 to 20 mils thickness, a non-sudsing wetting agent (such as Kodak Photo-flow R®) is recommended to increase ability of the moisture to swiftly make its way through the pin-holes.
Convenient output plugs on rear of unit allow use of customer supplied external signal systems such as lamps, Klaxon horns, recorders, etc. Output from these plugs is 120 volt A.C.
Voltage Type: DC Voltage Range (kV): 67.5 Volts Voltage Output Accuracy: ±5% Coating Range (Min-Max): 1 – 20 mils (0 – 500 μm) Operating Temperature: 32°F to 122°F (89.6° to 251.6° C) Holiday Indicator Type: Audible/Visual Battery: 120V AC Battery Life: N/A (Number of Holidays) Low Battery Indicator: 120V AC (Optional 220V to 120V transformer) Unit Weight: 1.8 lbs Unit Dimensions (LxWxH): 9” x 9” x 3.25” Domestic/International Standards Unit Complies With: AS 3894.2, ASTM D 5162-A, ASTM G6, ASTM G62-A, BS 7793-2, JIS K 6766, NACE SP 0188, NACE TM0384 Factory Warranty: 3 Month