NM01CATSPI137497
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Digital Electronic Pit & Depth Gauge | 0–1" (0–25mm)
High-Precision Surface Evaluation for Corrosion and Weld Inspection
This Electronic Digital Pit Gauge is a precision instrument designed to measure the depth of surface-breaking discontinuities, specifically localized corrosion (pitting), scratches, and gouges. Unlike standard depth micrometers, this gauge features a specialized narrow-diameter contact pin and a wide-base bridge, allowing it to span over a pit or undercut to provide an accurate reading of the material loss.
Key Performance Features
Dual-Unit Measurement: Instant, one-button switching between Imperial (Inches) and Metric (Millimeters) to suit global project specifications.
Large LCD Display: High-contrast digital readout provides clear, error-free results, eliminating the "parallax error" common with analog or vernier gauges.
Hardened Stainless Steel Construction: The bridge and measuring pin are crafted from hardened stainless steel for maximum durability and resistance to wear in harsh industrial environments.
Zeroing Capability: Features a "Zero" button that allows for calibration at any point, essential for verifying the depth relative to a curved or irregular surface.
Specialized Contact Pin: Equipped with a fine-tipped needle (typically $0.5$ mm or $1.0$ mm) to ensure it can reach the bottom of even the narrowest pits.
Technical Specifications
| Feature | Specification |
| Measuring Range | $0$ – $1$ inch ($0$ – $25$ mm) |
| Resolution | $0.0005$ inch ($0.01$ mm) |
| Accuracy | ±$0.001$ inch (±$0.03$ mm) |
| Bridge Length | $1.5$ to $2.0$ inches (Application dependent) |
| Pin Diameter | $< 1.5$ mm (Conical or Flat tip options) |
| Battery Type | LR44 or SR44 Silver Oxide Button Cell |
| Data Output | Integrated RS232 port (on select models) |
Ideal Applications
Corrosion Mapping: Measuring "Remaining Wall Thickness" in pipes and tanks by quantifying the deepest pits.
Weld Inspection: Evaluating weld undercut depth and reinforcement height to meet AWS D1.1 or API 1104 standards.
Aerospace: Quantifying scratch depths on wing skins or engine components.
Civil Engineering: Assessing rebar corrosion and spalling depth in concrete structures.
Pro-Tip: Calibrating for Accuracy
Before each use, place the gauge on a certified flat glass or steel plate (Calibration Block). Press the "Zero" button to ensure the base and pin are perfectly aligned. For curved surfaces like pipe, always align the bridge longitudinal to the axis of the pipe to minimize errors caused by the curvature.
