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  • Coating Inspection Equipment - Paint Inspection
  • PosiTector 6000 System
  • DeFelsko - Other Products
  • Coating Properties - TQC Laboratory Equipment
  • Humidity/Salt Fog/Cyclical Cabinets
  • Kitagawa
  • Multimeter and Clampmeters
  • Powder Coating Test Equipment
  • HoldTight® 102 and 365
  • Concrete Testing
  • Metal Testing / UT Testing
  • Pit Depth and Weld Gauges
  • MPI - Yokes and Coils
  • Cathodic Protection
  • Precision Measuring Instruments
  • MBX Belts and Accessories
  • Locating, Boroscopes, Water, Force - Other
  • Flashlights - Light Meters

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  • TQC/Sheen
  • DeFelsko
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  • GAL
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  • View all Brands

    • Pit Depth and Weld Gauges

    • Bridging Accessories

      Bridging Accessories

      Parts for Bridging Gauges (N99-9) Main Blade N88-9-1 $330.00 Connector Blade N88-9-2 $85.00 End Blade N88-9-3 $55.00 Slider Blade N88-9-4 $65.00 Tee Sections (12") N88-9-5 $80.00 Plus Tee Sections...

      $20.00
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    • Jr. Tri-Gauge

      Jr. Tri-Gauge

      The Junior Tri-Gauge VM® 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...

      $110.00
      Add to Cart
    • Reaching Plus 6" Blade (Standard or Magnetic)

      Reaching Plus 6" Blade (Standard or Magnetic)

       Reaching Pit Gauges have a huge advantage over conventional 'Center Mount' Pit Gauges in that measurements can be taken right next to a weld, reinforcing pad or risers. Assuring compliance with Corrosion Allowances for equipment...

      $365.00
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    • Contact Point Extension - 0.5 "

      Contact Point Extension - 0.5 "

      All of Western Instruments Pit Gauges have a range of just slightly over 12.7mm or 0.500”, with any one of our 3 types of Contact Points. However, during some inspections, this range is simply not enough. To increase the range of our PitGauges,...

      $30.00
      Add to Cart
    • Tube Sheet Pit Gauge (N88-TS)

      Tube Sheet Pit Gauge (N88-TS)

      The Tube Sheet Pit Gauge® is designed to fit inside most ½ OD (0.500 or 12.7mm) Boiler Tube, where the resulting Inside Diameter is just over (0.375 or 9.5mm). The Tube Sheet Pit Gauge® is designed to fit inside most ½ OD (0.500 or...

      $1,175.00
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    • #1 - #3 Pit Depth Gauge Tip

      #1 - #3 Pit Depth Gauge Tip

      Pit Gauge Contact PointsWestern offers a variety of Contact Points, for the Pit Gauge Product Series, 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 of...

      $12.00
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    • Reference Gauge

      Reference Gauge

      The Reference Gauge® was originally designed to measure Reference Indications (Holes or Notches) which are machined into Calibration Standards for various types of Non-Destructive Testing Equipment (Ultrasonics, Eddy Current, Flux Leakage, etc.)...

      $635.00
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    • Jr. Bridging Pit Gauge

      Jr. Bridging Pit Gauge

      Jr. Bridging Pit Gauge Group The Jr. Bridging Pit Gauge Group provides Inspectors with an Economical Alternative to the Bridging Pit Gauge System. The new Jr. Bridging Pit Gauge is available as 3 models; the standard Jr...

      $415.00
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    • Bridging Pit Gauge - Standard/PLUS

      Bridging Pit Gauge - Standard/PLUS

      Bridging Pit Gauge System The Bridging Pit Gauge System allows the Corrosion Inspector to Span over or Cantilever into Large Areas of Weight Loss Corrosion, to obtain accurate and consistent measurements, or cross sections, of Pit Depth. As...

      $750.00
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    • Pocket Pit Gauges

      Pocket Pit Gauges

      Pocket Pit Gauge The Reversible Blade of the Pocket Pit Gauge (N88-4) is used to measure isolated pitting with its two Contact Surfaces, a 1.5" (38mm) long Knife Edge Blade, as well as a Spot Blade with two Reference Points that are 0.375" (9.5mm) apart...

      $250.00
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    • Basic Pit Gauge

      Basic Pit Gauge

      Basic N88-2 Center Mount 2.5"(64mm) Blade, our most popular Gauge   *Optional Digital Indicator   Assuring compliance with Corrosion Allowances for equipment wherever Corrosion affects materials, such as Pipeline, Vessels, Piping,...

      $140.00
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    • Analog and Digital Indictor Gauge

      Analog and Digital Indictor Gauge

      Western Instruments Dial Pit Gauges, such as a Basic Pit Gauge, can actually be 3 different Models. Our 3 different Dial Indicators are interchangeable, and fit the same Blade, therefore, we can offer;▪ Imperial Basic Pit Gauge (N88-2-A) or▪ Metric Basic...

      $70.00
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    • Weld Profile Gauge

      Weld Profile Gauge

      G.A.L. Gage Co. GAL-29 Weld Profile Gauge Cat # 29 Quickly & easily check your welds for proper profile Only 3.5" long by 1.5" wide when collapsed. Easy to use Fits in pocket! All Stainless Steel.

      $48.50
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    • 1 3/16 to 2" Taper Gauge

      1 3/16 to 2" Taper Gauge

      1 3/16 to 2" Taper Gauge Stainless Steel All increments permanently engraved Front side - Standard Back side - Metric   SPECIFICATIONS Max Range 2" 50mm Min Range 1-3/16" 30mm Graduations 1/64" 0.2mm

      $72.00
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    • 5/8 to 1 3/16 Taper Gauge

      5/8 to 1 3/16 Taper Gauge

      G.A.L. Gage Co. Gal-28 Taper Gauge Cat # Sub 28A Features 410 Stainless Steel Measurement Scale On side I: Inches On side II: Metric Specifications   Inches Metric Max Range 5/8" 15mm Min Range 1/32" 1.0mm Graduations 1/64" 0...

      $62.75
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    • 1/32 to 5/8 Taper Gauge

      1/32 to 5/8 Taper Gauge

      G.A.L. Gage Co. Gal-28 Taper Gauge Cat # Sub 28A Features 410 Stainless Steel Measurement Scale On side I: Inches On side II: Metric Specifications   Inches Metric Max Range 5/8" 15mm Min Range 1/32" 1.0mm Graduations 1/64" 0...

      $51.00
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    • Digital Welding Gage

      Digital Welding Gage

      G.A.L. Gauge Co. GAL-18 Digital Welding Gauge Cat # 18 Holds either the zero setting or measured value at any position for differential measurements.Warranty: One Year Digital Welding GaugeFeatures  Holds either the zero setting or...

      $98.75
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    • Pipe Pit Gage

      Pipe Pit Gage

      G.A.L. Gage Co. GAL-17 Pipe Pit Gauge Cat # 17 Range is 0 to 1/2" in 1/64" & .010 Increments; Arm Can be Locked in Place at Any Dimension; All Stainless SteelMeasurement Scale: Inch or Metric Warranty: One Year The G.A.L. Pipe Pit Gauge...

      $93.00
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    • Mini Fillet Weld Keys

      Mini Fillet Weld Keys

      G.A.L. Gauge Co. GAL-16 Mini Fillet Weld Keys Cat # 16 Mini Fillet Weld Keys All Gauges Stainless Steel Set Comes with Handy Key Chain & Pocket Pouch 11 Different Sizes in Inches with Metric Equivalent Markings – 1/8” to...

      $50.00
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    • Mini Sub Gauge

      Mini Sub Gauge

      G.A.L. Gauge Co. GAL-14 Mini Sub Socket Weld Gauge Cat # 14 Check Throat DimensionsMeasurement Scale: InchWarranty: One Year “Mini Sub” Socket Weld Gauge Features  Check Throat Dimensions Check Leg Length Checks All Pipe...

      $75.00
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    What is a Pit Gauge?

    A basic pit gauge has a simple lever and a pointer, whereas advanced and more accurate models may have digital readouts or analog dial indicators. Different sizes and designs of pit gauges enable corrosion inspectors to measure components of all shapes and sizes in almost all industries.

    Various surface shapes and sizes require different types of pit gauges. Some bigger shapes like tanks, have gauges with parts that can be extended to cover larger surface areas. The type of tip that scans the pit varies in length and thickness, and the most common are:

    • Standard - Universal for general corrosion tests
    • Conical - Larger than standard, used when a large amount of scanning is required
    • Needle tip - For small diameter and shallow pits (very delicate)

    A pit gauge is very convenient to use, as it is composed of only one movable part and precisely registers to +/- 0.0005 inches. The scale of a pit gauge is graduated in decimal and fractional inches and is capable of measuring degree of thickness from 0 to 0.625 inches. Pit gauges are available in pocket sizes, so they can be easily carried and transported.

    The following equipment particularly benefits from corrosion measurement using pit gauges:

    • Pressurized equipment (boilers, pipelines, storage tanks, piping, vessels)
    • Tube-shaped products (drill pipes, casings)
    • Aircraft elements
    • Structures and bridges

    Pit gauges are used to determine whether corrosion has increased. In actual settings, inspectors are continually required to conduct measurements of pit depths.

    Lever Pit Gauges

    Lever Pit Gauges are the simplest form of Pit Gauge, with an original Patent issued in 1935 as a Pipe Pit Gauge (J.C. Stirling). Until Western introduced the Tri-Gauge in 2004, no changes had been made to the original design of Stirling's. Western's improved designs make our Pointer Type Pit Gauges effective for Weld Measurement Gauges for Weld Undercut and Weld Reinforcement.

    Western offers the original Tri-Gauge, which has a range of +/-25mm (0.50") with a resolution of +/-0.5mm (0.01") and the new Jr. Tri-Gauge (introduced in 2012) has a Range of 3mm (0.100"), with a resolution of 0.2mm (0.005").

    What is a Tri-Gauge?

    The Tri-Gauge® 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) Comparator; 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

    What is a Jr. Tri-Gauge?

    The Junior Tri-Gauge VM® 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 is not an absolute measuring tool. The Junior Tri-Gauge® is supplied with a Vinyl Sheath Storage Case and Instructions.

    What standard Pit Gauges does MTest offer?

    Over the years, the popularity of our various models has evolved, due to market acceptance and knowledge of the capabilities of our Pit Gauges. Many years ago, the Basic Pit Gauge was popular, simply because of price, and the shape was similar to Starrett's Machinist Depth Gauges. The Starrett Gauges were not specifically designed for Pit Gauging, due to the large size, heavy weight, and the extremely limited measurement range. Another example of a misapplied to is the use of a Tire Tread Gauge for corrosion.

    Today, our versatile Pocket Pit Gauge is, by far, our most popular Pit Gauge model, due to its ability to be used on flat and simple or complex curvatures. Pipe, Tube, and Vessels are examples of Simple Curvatures, while some examples of Complex Curvatures are Cylinder Necks (and Bases), the Knuckle area of Vessel Heads, Pump Impellers, and Turbine Blades.

    The models that have gained popularity over the years and are currently even in production with the Basic Pit Gauge, are our Reaching Pit Gauges. Reaching Pit Gauges have a huge advantage over conventional 'Center Mount' Pit Gauges in that measurements can be taken right next to a weld, reinforcing pad or risers.