Pit Gauge

Tri-Gauge Pit Gauge N88-1

Range/Resolution: +/-13mm (0.500″) / 0.5mm (0.010″)

The Tri-Gauge® Pit & Welding Gauge Part No. N88L-1 is today’s most versatile Lever Pit Gauge, with its Metric and dual Imperial Scales. Additionally, the Tri-Gauge® serves as a basic Weld Inspection Gauge for; Undercut Depth, Weld Crown Height, a Porosity (diameter) Comparitor; and both Metric and Imperial Rules. The Tri-Gauge® is fitted with a Patented pointer Offset Correction® for improved accuracy and repeatability. Lever Pit Gauges are intended to evaluate corrosion, and not as an absolute measuring tool. The Tri-Gauge® is supplied with a Pocket Protector type Case and Instructions.


Junior Tri-Gauge N88L-2

Range/Resolution: +/- 3mm (0.100″) / 0.2mm (0.005″)

The Junior Tri-Gauge VM® Lever Type Pit Gauge is today’s most accurate Lever Pit Gauge, with a continuing tradition of Metric and dual Imperial Scales. The Junior Tri-Gauge® serves its traditional use as a Pit Depth Gauge, but also as a Weld Inspection Gauge for: Weld Undercut Depth, Weld Crown Height, and both Metric and Imperial Rules. The Junior Tri-Gauge®, like the original Tri-Gauge®, is fitted with our Contact Point Offset Correction® for improved accuracy and repeatability. Any Lever Pit Gauge is intended to evaluate corrosion / erosion, and not an absolute measuring tool. The Junior Tri-Gauge® is supplied with a Vinyl Sheath Storage Case and Instructions.


Basic Pit Gauge Center Mount 2.5″ N88-2

Measuring Range: 0.0-0.5″ (0.0 – 12.7 mm)

Resolution: 0.001″ (0.01 mm)

Dial Diameter: 1.4″ (35.5 mm)

Center-mount 2.5″ (63.5 mm) Blade

Available with dial or digital indicators

The Basic Pit Gauge N88-2 is used to measure the Pit Depth or the amount of surface corrosion on metal constructions like pipelines, support structures, storage tanks, drill pipes, steel bridges, aircraft components or concrete structures.

The N88-2 Pit Gauges assure compliance with vessel, pipeline and tank specifications for corrosion and erosion depth measurement.


Basic Pit Gauge Centre Mount 3.5″ N88-3

Measuring Range: 0.0-0.5″ (0.0 – 12.7 mm)

Resolution: 0.001″ (0.01 mm)

Center-mount 3.5″ (89 mm) Blade


Basic Pit Gauge Centre Mount 3.5″ Magnetic N88-3M

Measuring Range: 0.0-0.5″ (0.0 – 12.7 mm)

Resolution: 0.001″ (0.01 mm)

Center-mount c/w Two(2) magnetic cartridges 3 1/4″ Blade


Pocket Pit Gauge with 1.5″ Dual Edge Blade-Reversible N88-4

Measuring Range: 0.0-0.5″ (0.0 – 12.7 mm)

Resolution: 0.001″ (0.01 mm)

Center-mount 1.5″ (38 mm) Dual Edge Blade (Reversible)


Reaching Pit Gauge 4.75″ N88-5

Measuring Range: 0.0-0.5″ (0.0 – 12.7 mm)

Resolution: 0.001″ (0.01 mm)

Center-mount 4.75″ (121 mm) Blade


Reaching Pit Gauge Magnetic 4.75″ N88-5M


Reaching Pit Gauge Plus 6″ N88-6

Measuring Range: 0.0-0.5″ (0.0 – 12.7 mm)

Resolution: 0.001″ (0.01 mm)

Center-mount 6in (152mm) Blade


Reaching Pit Gauge Plus 6″ Magnetic N88-6M