The Ultimate Buyer's Guide for Purchasing Surface Profile Gauge Price

A variety of problems can arise from incorrect surface profiles. Both too much and too little can be problems. If there is insufficient profile then coating adhesion may be compromised. This is a more pronounced with high build industrial coatings. Too much profile and you risk rogue peaks. These can have very little coating film cover and risk initiating corrosion issues. Over profile can also increase paint consumption. This is a problem with thinner build coatings such as finishing coatings. Surface profile is affected by many factors including abrasive type, abrasive size, quantity of abrasive recycles, blast angle, nozzle distance, nozzle pressure, as well as substrate conditions. Both facility management and coating suppliers can specify profile. Ask them prior to starting work what their specifications are.

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Depth Micrometers for Blasted Steel

Depth micrometers fitted with a flat base and fine pointed probe such as the PosiTector SPG, are a low per-test-cost method that use a spring-loaded tip which drops into the valleys of a blasted steel surface to measure peak-to-valley height. With a greater range than replica tape and most stylus roughness instruments, they are a quick and reliable way of determining surface profile.

Stylus Roughness Testers for Blasted Steel

Drag stylus roughness instruments operate by dragging a stylus at a constant speed across the blasted steel surface being measured. The instrument records the up and down distances the stylus travels as it traverses across the surface and averages the vertical distance between the highest peak and lowest valley (Ra).

Some stylus roughness testers may leave scratches on the surface being measured, potentially contributing to future defects that could cause premature rusting and coatings failures. Additionally, the precise stylus assembly tends to be somewhat fragile, so field use may not be ideal. Lastly, stylus roughness tester’s probe tips can be prone to degradation and reading accuracy may suffer.

Measuring Concrete Surface Profile

The most common methods of determining concrete surface profile (CSP) include depth micrometers, replica putty, and visual comparators.

Depth Micrometers for Concrete Surface Profile

Depth micrometers such as the PosiTector SPG TS, are a no per-test-cost method that use a spring loaded tip (60°—conically shaped) which drops into the valleys of a concrete surface profile to measure peak-to-valley height.

While less expensive methods are available, depth micrometers offer a means to quantitatively record readings in a statistically meaningful way.

Replica Putty

Replica putty is a means of creating a permanent replica of a CSP, similar in concept to replica tape. A 2-part compound is combined then pressed into the surface of a concrete slab. It is then removed and allowed to cure. Using a comparative reference, a subjective profile is assumed.

Comparative Methods

Using molded-rubber “chips”; subjective, comparative assessments may indicate a general profile of a concrete surface. Comparative methods are efficient in that they offer a quick check, but do not provide a quantitative means to measure and record the profile of a concrete surface.

2D Parameters

Ra — Roughness average: arithmetic average of the absolute values of the profile height deviations within the evaluation length measured from the mean line

Rq — RMS roughness: root mean square average of the profile heights within the evaluation length measured from the mean line

Rz — Average maximum height of the profile: arithmetic average of the successive values of the maximum peak to deepest valley within each sampling interval calculated over the evaluation length

Rp — Maximum profile peak height: the distance between the highest point of the profile and the mean line within the evaluation length

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Rv — Maximum profile valley depth: the distance between the deepest valley and the mean line within the evaluation length

Rt — Total profile height: the distance between the highest peak and the deepest valley within the evaluation length

Rpc — Peak count: number of peaks per unit length within the evaluation length

Rpc Boundary C1 — The boundary lines located equidistant above and below the profile mean line. A Peak is counted after the trace goes below the lower boundary line and above the upper boundary line. The default is 0.5 µm

3D Parameters

H — Average maximum peak-to-valley height: the distance between the anvils minus the 50.8 µm (2 mils) of incompressible film

Spd — Areal peak density: the number of peaks per unit area

Sa — Average roughness: the arithmetic average of the absolute values of the measured height deviations from the mean surface taken within the evaluation area

Sq — Root mean square roughness: the root mean square average of the measured height deviations from the mean surface taken within the evaluation area

Sz — Maximum area peak-to-valley height: the vertical distance between the maximum peak height and the maximum valley depth. Commonly referred to as St

Sp — Maximum area peak height: the maximum height in the evaluation area with respect to the mean surface

Sv — Maximum valley depth: the absolute value of the minimum height in the evaluation area with respect to the mean surface

DEFELSKO® POSITECTOR® SPG SURFACE PROFILE GAUGE PROBE Integral Digital Depth Micrometer for Blasted Steel

• Blasted steel
• On-site use
• When large numbers of readings are required in a short time
• Integral probe for one-handed use

• 60° tip angle
• 30° tip angle (available)
• Solvent, acid, oil,
  water, and dust
  resistant (weatherproof)
• Can achieve up
  to 50 readings/
  minute, making
  it perfect
  to quickly and
  accurately
  measure big
  surfaces
• Durability of probe

• Is a spot measurement rather than an area measurement

• ASTM D
• BASTM D
  (SPG TS only)
• AS .5-C (with
  optional 30° tip)
• US Navy NSI
  009-32
• Navy NAVSEA
  009-32
• US Navy NAVSEA
  PPI -000
• SSPC PA 17
• SANS
• and more

DEFELSKO® POSITECTOR® SPGS PROBE – CABLED Cabled Digital Depth Micrometer for Blasted Steel

• On-site use
• When large numbers of readings are required in a short time
• Cabled probe for use in extended reach measuring

• Cable extends the reach of the probe from the gauge body. Ideal where the inspector has to reach to get a reading

• Time required to place and burnish test strip

• ASTM D
• ISO -5
• NACE RP287
• SSPC-PA 17
• SSPC-SP5, SP6,
  SP10, SP11-87T
• and more

DEFELSKO® POSITECTOR® REPLICA TAPE READER (RTR–PROBE ONLY) Replica Tape Reader for Blasted Steel and Textured Coatings

• For use where an Inspector has a preference for replica tape, rather than a depth gauge or drag stylus

• Provides more accurate peak-to-valley height measurement
• Used test Testex tapes can be retained on file with other quality inspection records for reference

• Time required to place and burnish test strip

• ASTM D
• ISO -5
• NACE RP287
• SSPC-PA 17
• SSPC-SP5, SP6,
  SP10, SP11-87T
• and more

DEFELSKO® 3D REPLICA TAPE READER Replica Tape Reader for 2D/3D Surface Profile Parameters

• Works with Flat,
  curved, or irregular
  surfaces
• For use where either standards or facility management call for reporting in 2D or 3D format
• For use where an Inspector has a preference for replica tape, rather than a depth gauge or drag stylus

• Displays 2D &
  3D parameters
  of replica tape
  within seconds of
  burnishing

• Time required to place and burnish test strip

• ASME B46
• ASTM D
• ISO -5
• NACE SP287
• SSPC-PA 17,
  SSPC-SP5, SP6,
  SP10, SP11-87T
• and more

DEFELSKO® POSITECTOR®SPGTS SURFACE PROFILE GAUGE PROBE Integral Digital Depth Micrometer for Concrete

• Ideal measurement
  tool for surface
  profile of concrete
  created by blasting,
  scarifying, grinding,
  etching
• Range: 0 – µm

• 60° tip angle
• Ability to measure up to µm/6 mm. Necessary for measuring profile on concrete. Very limited alternative.

• Not a accurate on the lower end of range of measurement capabilities

• ASTM D

TESTEX SURFACE PROFILE DIAL THICKNESS GAUGE – MICRONS Testex Analog Spring Micrometer

• Can measure
  from 20.32µm – 162.56µm
• Legacy replica tape system
• For use where an Inspector has a preference for replica tape, rather than a depth gauge or drag stylus.

• The original replica tape system. In use internationally for decades. Remains a reliable source of profile data.

• Increased possibility of human error when reading a dial gauge rather than LED screen.
• Time required to place and burnish test strip.

• ISO-5,
• AS-5
• AS-4

DEFELSKO® POSITECTOR® SPG SURFACE PROFILE GAUGE PROBE DEFELSKO® POSITECTOR® SPGS PROBE – CABLED DEFELSKO® POSITECTOR® REPLICA TAPE READER (RTR – PROBE ONLY) DEFELSKO® 3D REPLICA TAPE READER DEFELSKO® POSITECTOR® SPGTS SURFACE PROFILE GAUGE PROBE

TESTEX SURFACE PROFILE DIAL THICKNESS GAUGE – MICRONS

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Description Integral Digital Depth
Micrometer for Blasted
Steel Cabled Digital Depth
Micrometer for Blasted
Steel Replica Tape Reader
for Blasted Steel and
Textured Coatings Replica Tape Reader for
2D/3D Surface Profile
Parameters Integral Digital Depth Micrometer for Concrete Testex Analog
Spring Micrometer Best Scenarios

• Blasted steel
• On-site use
• When large numbers of readings are required in a short time
• Integral probe for one-handed use

• On-site use
• When large numbers of readings are required in a short time
• Cabled probe for use in extended reach measuring

• For use where an Inspector has a preference for replica tape, rather than a depth gauge or drag stylus

• Works with Flat,
  curved, or irregular
  surfaces
• For use where either standards or facility management call for reporting in 2D or 3D format
• For use where an Inspector has a preference for replica tape, rather than a depth gauge or drag stylus

• Ideal measurement
  tool for surface
  profile of concrete
  created by blasting,
  scarifying, grinding,
  etching
• Range: 0 – µm

• Can measure
  from 20.32µm – 162.56µm
• Legacy replica tape system
• For use where an Inspector has a preference for replica tape, rather than a depth gauge or drag stylus.

Benefits

• 60° tip angle
• 30° tip angle (available)
• Solvent, acid, oil,
  water, and dust
  resistant (weatherproof)
• Can achieve up
  to 50 readings/
  minute, making
  it perfect
  to quickly and
  accurately
  measure big
  surfaces
• Durability of probe

• Cable extends the reach of the probe from the gauge body. Ideal where the inspector has to reach to get a reading.

• Provides more accurate peak-to-valley height measurement
• Used test Testex tapes can be retained on file with other quality inspection records for reference

• Displays 2D &
  3D parameters
  of replica tape
  within seconds of
  burnishing

• 60° tip angle
• Ability to measure up to µm/6mm. Necessary for measuring profile on concrete. Very limited alternative.

• The original replica tape system. In use internationally for decades. Remains a reliable source of profile data.

Disadvantages

• Is a spot measurement rather than an area measurement

• Time required to place and burnish test strip.

• Time required to place and burnish test strip.

• Time required to place and burnish test strip.

• Not a accurate on the lower end of range of measurement capabilities

• Increased possibility of human error when reading a dial gauge rather than LED screen.
• Time required to place and burnish test strip.

Standards

• ASTM D
• BASTM D
  (SPG TS only)
• AS .5-C (with
  optional 30° tip)
• US Navy NSI
  009-32
• Navy NAVSEA
  009-32
• US Navy NAVSEA
  PPI -000
• SSPC PA 17
• SANS
• and more

• ASTM D
• ISO -5
• NACE RP287
• SSPC-PA 17
• SSPC-SP5, SP6,
  SP10, SP11-87T
• and more

• ASTM D
• ISO -5
• NACE RP287
• SSPC-PA 17
• SSPC-SP5, SP6,
  SP10, SP11-87T
• and more

• ASME B46
• ASTM D
• ISO -5
• NACE SP287
• SSPC-PA 17,
  SSPC-SP5, SP6,
  SP10, SP11-87T
• and more

• ASTM D

• ISO-5,
• AS-5
• AS-4