Western Instruments N88-5M Reaching Magnetic Pit Depth Gauge 4.75" Blade
Western Instruments Pit Gauges assure compliance with vessel, pipeline, tank and OCTG specifications for corrosion and erosion depth measurement.
Measuring Range: 0.0-0.5" (0.0 - 12.7 mm)
Resolution: 0.001" (0.01 mm)
Dial Diameter: 1.4" (35.5 mm)
4.75" (121 mm) Blade
Available with dial or digital indicators
Western Instruments Pit Depth Gauges allow the Corrosion Inspector to conveniently measure Pit Depth or material loss in areas of Weight-Loss Corrosion.Various Blades for the Pit Gauges are available for different applications, including the Bridging Pit Gauge which permits Inspectors to Span or Cantilever over large areas of Weight-Loss Corrosion, to get a true measure of Pit Depth
Kit Contents
- Western Instruments N88-5M Reaching Magnetic Pit Gauge
- 4.75" (121mm) Blade c/w Two(2) magnet cartridges
- N88-S - Standard contact tip
- N88-C - Conical contact tip
- Allen wrench (for adjustment)
- Calibration Certificate Without Data
- Operator Instructions
- Carrying Case
Features
Zeroing Dial Indicator
- To quickly check the Zero Point of the Dial indicator, place the Blade on a representative smooth surface.
- Gently press the Plunger, until the contact point touches the surface.
- While the contact point is on the surface, loosen the Bezel Lock, and rotate the Bezel Scale until it reads '0' with respect to the pointer.
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Height Zeroing
- Loosen the Fastener(s) holding the Dial Indicator in place.
- Hold the Blade firmly on a Flat Surface, and gently press the body of the Dial Indicator down until the contact point touches the flat surface.
- Carefully re-tighten the Clamp Fastener(s) or the Set Screw.
- Any fine zeroing can be done by rotating Bezel Scale on the Indicator.
- Height Zeroing should be done, whenever the unit is put into to use.
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Zeroing a Digital Indicator
- Digital Indicators can be Height Zeroed or Positioned in the same way as a Mechanical Dial Indicator.
- To Zero the Digital Indicator simply press the Zero Button when the Contact Point is on a reference point. If the Digital Indicator is Height Zeroed, press Zero when the Plunger is fully retracted.
- To select Metric or Imperial Measurement, simply press the mm/in Button.Whennot in use, press the On/Off Button to turn the Indicator off.
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Indicator Positioning
- The position (or rotation) of the Dial indicator can be changed by simply loosening the Clamp Fasteners or Set Screw, and rotate the Dial Indicator about the Blade.
- After the Dial Indicator is rotated, the unit should be Dial Zeroed.
| Specifications
Dial and Digital Indicators
|  | | |
| Model | Imperial Dial Indicator | Metric Dial Indicator | Digital Indicator |
| Range | 0.0-0.5" | 0.0-12.7 mm | 0.0-0.5" |
| Resolution | 0.001" | 0.01 mm | 0.0-12.7 mm |
| Dial Diam. | 1.4" | 35.5 mm | 56 mm, 2.2" |
Measuring Corrosion (Depth)
| | | |
| Model | 1-Standard Tip | 2-Conical Tip | 3-Needle Tip |
| Diam. | 0.040" diam. | 0.010" diam. | 0.005" diam. |
| Tipe / Part Number: | #1 Contact Point-Standard N88-S | #2 Contact Point-Conical N88-C | #3 Contact Point-Needle N88-N |
* Western offers a variety of Contact Points, which are all 0.625" (16mm) long. Any ADG Contact point can be used with our special dial indicators, but a different length may affect Height Zeroing, or the vertical position of the Dial Indicator. Contact Points are easily replaced, by extending the Contact Point , and turning it counter clockwise.
Related Products
N88-12
Reference Pit Gauge- 5.5" (140mm) long, 0.75" (19mm) wide with inverted V Edge, 2 magnet cartridges. Similar and interchangeable with Bridging Pit Gauge Main Blade.
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