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TI-25S Ultrasonic Wall Thickness Gauge

Made in the USAIf you reguarly have to test a limited selection different materials the TI-25S is the ideal product for you. It contains 8 velocities of the most common materials (see complete List of Materials below) and two velocities that the user can define by using a simple software program.

The TI-25S has an easy to read backlit display, even in dim light, and the unit operates for up to 200 hours on a single set of batteries.

The TI-25S comes complete, ready to use, and is protected by our 5 year limited warranty.

Velocity Settings
8 preset velocities and 2 custom velocities on the TI-25S allow the user to customize it for specific applications, or to tune the calibration to be optimized for a specific type of material. Each time the "MATL Key" is pressed the velocity will toggle from one to the next in a circular pattern.
The preset velocities are as follows:

  • 1. Aluminium 2024 (6375 m/s )
  • 2. Stainless Steel 303 (5664 m/s)
  • 3. Steel 4340 (5918 m/s)
  • 4. Cast Iron (4546 m/s)
  • 5. Plexiglass (2692 m/s)
  • 6. PVC (2387 m/s)
  • 7. Polystyrene (2337 m/s)
  • 8. Polyurethane (1778m/s)
  • 9. Custom 1
  • 10.Custom 2

Note: To define the Custom 1 & 2 options, the free PC software needs to be downloaded to the gauge using the optional data cable (p/n N-306-0010)


  • Multi-function 4.5 digit liquid crystal display with 0.500 inch numerals, backlit for use in poor light conditions.
  • Measures from 0.025 to 6.000 inches (0.60 to 150.0 millimeters) switch to select English or metric units.
  • 8 pre-set velocities and 2 custom velocities
  • Measurements displayed in inches, nches/microsecond, millimeters, and meters/second.
  • Four readings per second for single point measurements
  • Ability to change between velocities without the use of computer software

10 User-Selected Material Types
Each time the "MATL" key is pressed, the material type (calibration setting of the acoustic velocity) changes from one type to the other. The abbreviations, description and sequence is shown below.

*Note: If the Custom 1 and 2 are needed, they are set using the PC software (free) and downloaded to gauge using the data cable (optional, p/n N-306-0010)

Typical Applications
Typical Applications

Complete Kit

The TI-25S is supplied as a complete kit with:

  • Gauge
  • Probe
  • 4 oz. bottle of coupling fluid
  • 2 AA batteries
  • NIST-Traceable Calibration Certificate
  • Operating Instruction Manual
  • Foam-fitted carrying case.



Measuring Limits
Minimum Radius for Convex Surfaces Minimum Radius for Convex Surfaces 8.89 mm
Minimum Radius for Concave Surfaces 76.2 mm
Minimum Radius for Concave Surfaces Minimum Headroom 25.4 mm
Minimum Sample Diameter Minimum Sample Diameter 3.8 mm
Minimum Substrate Thickness - F Minimum Substrate Thickness - F NA
Minimum Substrate Thickness - NFe NA


TI-SB Steel Test Block with NIST-Traceable Certificate

  • Precision Machined and Finished
  • Includes NIST Report and Test Data

More details

TI-SB Steel Test Block with NIST-Traceable Certificate 125793

TI-SB4 Uncertified Steel Test Block

  • Uncertified Steel Test Block
  • For convenient confirmation of thickness gauge calibration

More details

TI-SB4 Uncertified Steel Test Block 126277

TICC-M Protective Holder for Ultrasonic Gauges

  • Constructed from heavy duty Cordura Nylon
  • Belt loop included
  • Includes wrist & shoulder straps

More details

TICC-M Protective Holder for Ultrasonic Gauges 125807

TI-V-BLOCK Transducer Holder

  • The V-Block transducer holder offers the operator greater control and repeatabily when measuring on pipes and other curved areas.
    For 3/16" & 1/4" Transducers only.

More details

TI-V-BLOCK Transducer Holder 126200

N-306-0010 RS232 (DB-9 to Lemo) Data Cable 182cm

  • RS232 (DB-9 to Lemo) Data Cable 182cm

More details

N-306-0010 RS232 (DB-9 to Lemo) Data Cable 182cm 126320

DataComm Software

  • Compatible for Windows Vista and Windows 7.

More details

DataComm Software 126691

CF-AN Coupling Fluid

  • Used to create an ultrasonic coupling between the probe and material to be measured
  • Available in different volumes - 125ml / 250ml / 500ml / 1ltr / 5ltr / 25ltr

More details

CF-AN Coupling Fluid 126455

CF-4H High Temperature Coupling Fluid

  • Temperature Range:
    0° to 600° F
    -18° to 315° C

More details

CF-4H High Temperature Coupling Fluid 126919

CF-4H-950F High Temperature Coupling Fluid

  • Temperature range from 316ºC to 404 ºC

More details

CF-4H-950F High Temperature Coupling Fluid 127149

Cic-Wall | Wall Thickness Gauge Calibration

  • Easy planning of calibration
  • Short turnaround
  • Exclusively in accordance with DIN 55 350 Part 18, § 4.2.2, DIN ISO 8402 Part 1
  • Possibility to adjust and repair

More details

Cic-Wall | Wall Thickness Gauge Calibration 127035

Measuring Range: 0.025 to 6.000 inches
0.60 to 150.0 milimeters
depends on material and probe used
Range in Steel: 0.60-150.0 mm (0.025-6.00")
Resolution: 0.01 millimeter
0.001 inch
Velocity Range: 1250 to 10,000 meters/sec
.0492 to .3937 in/µs
Dimensions: 64 x 121 x 32 mm
(2.5 W x 4.75 H x 1.25 D inches)
Display: 4½ - Digit, 0.5" Backlit LCD
Probe: 1/4", 7.5 MHz, actual wearface is 10 mm
Probe P/N: T-102-3300
Cable: 1.2 m (4 ft.) waterproof cable with non-polarized, quick-disconnect connectors. Optional lengths up to 15 m (50 ft.).
Temp. Limits: Ambient: -30 to 50° C (-20 to 120° F)
Material: -20 to 100° C (-0 to 200° F)
Special high temperature probes are optionally available.
Battery Type: Two 1.5V alkaline or 1.2V NiCad AA cells.
Battery Life: Typically operates for 200 hours on alkaline and 130 hours on NiCad.
Weight: 283 gr
Accessories: Probe/cable assembly. 4 oz. bottle of coupling fluid, NIST Calibration Certificate, 2 AA batteries, operating instructions, hard-plastic carrying case.
Warranty: Gauge: 5 Years
Probes: 90 Days


Buy Now

TI-25S Complete Kit
€ 1.037,00 

TICC-M - Protective holder
€ 63,00 
CF-AN-250ml Coupling Fluid 250ml Bottle
€ 15,00 
Calibration Certificate - Calibration Inspection Certificate
€ 99,00 
V-Block Transducer Holder
€ 196,00 
TI-SB4 - Uncertified Steel Testblock
€ 140,00 
TI-SB-4H - Steel Test Block
€ 385,00 
TI-SB-4L - Steel Test Block
€ 385,00 
TI-SB-5L - Certified Steel Test Step Block
€ 385,00 
T102-3300 - 1/4", 7.5 MHz Probe
€ 335,00 
N-306-0010 - RS232 Data Cable 182cm
€ 77,00 
All mentioned prices are excluding VAT & excluding shipment costs.
Availability: Available , preorder 1-2 weeks , special order, request