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TI-25M Ultrasonic Wall Thickness Gauge

Made in the USA Measuring Range
0.025 - 6.00 inches
0.60 - 150.0 mm

Our CHECK-LINE TI-25M is designed to measure accurately the thickness of walls and the extent of corrosion of metals, ceramics, glass and the most rigid plastics from only one side!
You can use the TI-25M in different modes, either in a Single Thickness Reading mode or in a Scan mode. In the Scan mode, the probe has to be dragged over a large measuring area. Finally the minimum thickness reading measured during the “Scan” process will be displayed.

Due to its perfect design, the TI-25M probe is waterproof and can be submerged in water. Additionally, our gauge is impact-resistant, environmentally sealed and provides therefore an operation without any trouble even under tough field conditions.

  • CE Certified
  • Simple operator controls
  • Resolution of 0.001 inch (0,01 mm)
  • Large, backlit LCD display retains last reading
  • Special-purpose probes are offered for a variety of applications
  • Switch-selected units for inches or mm
  • For underwater surveying, probe cable lengths up to 50 feet are optionally
  • Includes NIST Calibration Certificate

Complete Kit

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

  • the gauge
  • T-102-3300 probe
  • 120 ml. bottle of coupling fluid
  • 2 AA batteries
  • NIST Calibration Certificate
  • Operating Instruction Manual

all in a foam-fitted carrying case.

Typical Applications
Typical Applications


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-25-UW-50 50 Foot (15 m) Underwater Probe / Cable Assembly

  • 50 Ft. Length, Waterproof Probe/Cable assembly with non-polarized, Dual-Lemo connectors.
  • 1/2", 5 MHz Probe for wide variety of steel, stainless steel, aluminum and similar applications.

More details

TI-25-UW-50 50 Foot (15 m) Underwater Probe / Cable Assembly 126123

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

CF-4H High Temperature Coupling Fluid

  • Temperature Range: -18° to 316° C

More details

CF-4H High Temperature Coupling Fluid 126919

CF-4H-950F Coupling fluid for high temperatures

  • Temperature range from 316ºC to 404 ºC

More details

CF-4H-950F Coupling fluid for high temperatures 127149

CF-AN Coupling Fluid

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

More details

CF-AN Coupling Fluid 126455

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 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

Range in Steel 0.60-150.0 mm (0.025-6.00")
Resolution 0.01 mm (.001")
Display 4½ - Digit, 0.5" Backlit LCD
Velocity Range 2000-10,000 m/sec. (6,500-33,000 ft./sec)
Probe 7.5 MHz, 6.35 mm Diameter (0.25")
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: -0 to 200° F (-20 to 100° C)
Special high temperature probes are optionally available.
Battery Type Two AA batteries
Battery Life 200 hours
Weight 196 g (7 ounces)
Size 64 x 114 x 32 mm
(2.5 x 4.5 x 1.25")
Warranty Gauge: 5 Years
Probes: 90 Days
Accessories Included Accessories Included

Special Purpose Models
Model Description
TI-25M-H High Temperature for surfaces up to 650° F or 343° Celsius
TI-25M-107 Cast Iron / Plastics
TI-25M-HW Heavy Wall (1.27-508mm)


Buy Now

Product name
TI-25M Complete kit
£ 1.189,00 
TI-25M-H Complete kit
£ 1.268,00 
TI-25M-HW Complete kit
£ 1.189,00 
TI-25M-107 Complete kit
£ 1.189,00 

Product name
TICC-M - Protective holder
£ 57,00 
CF-AN-250ml Coupling Fluid 250ml Bottle
£ 16,00 
Calibration Certificate - Calibration Inspection Certificate
£ 92,00 
V-BLOCK - V-Block Transducer holder
£ 180,00 
TI-SB4 - Uncertified Steel Testblock
£ 129,00 
TI-SB-4H - Steel Test Block
£ 353,00 
TI-SB-4L - Steel Test Block
£ 353,00 
TI-SB-5L - Certified Steel Test Step Block
£ 353,00 
T-102-3300 - 7.5 MHz Probe 1/4"
£ 307,00 
T-102-2000 - 5 MHz Probe1/4"
£ 271,00 
T-104-1000 - 1/2 inch 2.25 MHz Transducer for Cast Iron / Plastics
£ 281,00 
T-044-2000 - High Temperature Probe 1/2" 5 MHz
£ 353,00 
T-104-2000 - Heavy Wall 5.0 MHz Probe 1/2"
£ 281,00 
T-104-0000 - 1/2 inch 1 MHz Transducer for Plastics
£ 281,00 
TI-25-UW-50 - 15m Underwater Probe / Cable assembly
£ 698,00 
All mentioned prices are excluding VAT & excluding shipment costs.
Availability : Available , preorder 1-2 weeks , special order, request