We Checkline Europe B.V. would like to use cookies and similar technologies in order to optimize your shopping experience and this requires your consent. By clicking on the "Accept cookies" button you agree to our use of cookies and similar technologies. If you do not agree, you can refuse the use or customize settings for the respective cookies by clicking on the button "Cookie Settings".You also have the possibility to specify that only certain cookies, which we use on our website, should be activated. This banner will be displayed until you have selected your cookie preferences. If you decide against the use of cookies, we will not use cookies nor similar technologies, except those that are essential for the proper functioning of the website. Click here for our privacy policy

TI-25 Series Wall Thickness Gauges


The TI-25 series ultrasonic thickness gauges offer a comprehensive range of solutions for non-destructive wall thickness measurement on metals, plastics, and other solid materials—ideal when access is limited to one side only.

Whether you need a simple gauge for spot-checks or a fully-featured instrument for advanced applications, the TI-25 series covers a wide range of needs. Refer to the comparison table below to identify which model best suits your requirements.

Key Features (varies by model):

  • Optimised for Industrial Surfaces: All models use dual element probes for enhanced performance on non-uniform or worn materials.
  • Versatile Measurement Modes: Pulse-Echo as standard; selected models support Echo-Echo for readings through coatings and paint layers.
  • Material Velocity Options: Support for pre-set- and user-defined velocity settings depending on the model.
  • Advanced Capabilities: Higher-end models include data logging, scan mode, limit alarms, and differential mode for comparative analysis.
  • Easy-to-Read Display: Backlit LCD with measurement stability indicator and integrated zeroing function.

Key Benefits:

  • Application Flexibility: Suitable for wall thickness testing on tanks, pipelines, ship hulls, and structural elements.
  • Ready for the Field: Rugged housing and intuitive operation make it ideal for in-plant and on-site inspections.
  • Scalable Performance: A clear upgrade path from entry-level models to advanced units with logging and coating capabilities.

 

Various transducer sizes are available to accommodate flat surfaces, curved areas or restricted access points. A range of frequencies is offered to suit either increased measurement depth or enhanced resolution. Depending on the model, features include measurement through coatings, data logging capabilities, differential mode and high-speed scan modes—making the TI-25 Series suitable for everything from basic inspections to advanced industrial surveys.

Contact us to help identify the most suitable TI-25 model for your specific use case.

Features

  • Through-Coating Capability: Available on Echo-Echo models (TI-25MXT, TI-25DLXT) for accurate measurement beneath coatings without removing them.
  • Memory & Data Logging: DLX and DLXT models feature onboard memory capable of storing up to 10,000 readings.
  • Stability / Repeatability Indicator: The LCD display includes a six-segment bar graph providing real-time feedback on signal quality.
  • Accessory Compatibility: Compatible with a wide range of calibration blocks, couplants, and alternative transducers.
  • Specialised Transducers: In addition to standard models, high-temperature and underwater transducers are available for use with these gauges.
  • Warranty: 5-year warranty on the gauge, and 90 days on the transducer.
Complete Kit

The TI-25 Series wall thickness gauges are supplied as a complete kit, including the following items:

Standard version:

  • TI-25 Series ultrasonic wall thickness gauge
  • Ultrasonic transducer – the standard transducer type for each model is specified in the comparison table below
  • 120 ml bottle of coupling fluid
  • NIST-traceable calibration certificate
  • 2 AA batteries
  • Operating manual
  • PC software available for download
  • All items are delivered in a foam-lined plastic carrying case

 

WOP version:

Includes all items from the standard version except the transducer.
This option is intended for users who wish to use a different transducer than the standard one supplied with the kit.

Comparison Chart
 TI-25MXTI-25MXTTI-25DLXTI-25DLXTTI-25SX**TI-25PX**TI-25LTX**
DisplayTI-25MX DisplayTI-25MXT DisplayTI-25DLX DisplayTI-25DLXT DisplayTI-25SX DisplayTI-25PX DisplayTI-25LTX Display
KeypadTI-25MX KeypadTI-25MXT KeypadTI-25DLX KeypadTI-25DLXT KeypadTI-25SX KeypadTI-25PX KeypadTI-25LTX Keypad
Measurement Range with standard transducer on steel (*)0.63 -150 mmPulse - Echo 0.63 to 199.9mm, Echo - Echo 2.54 to 25.40 mm0.63 -150 mmPulse - Echo 0.63 to 199.9mm, Echo - Echo 2.54 to 25.40 mm0.63 -150 mm1 - 150 mm1 - 150 mm
Resolution0.01mm0.01mm0.01mm0.01mm0.01mm0.01mm0.05mm
Measurement modusPulse-EchoPulse-Echo / Echo-EchoPulse-EchoPulse-Echo / Echo-EchoPulse-EchoPulse-EchoPulse-Echo
Material velocity range305 - 18,542 m/s305 - 18,542 m/s305 - 18,542 m/s305 - 18,542 m/s305 - 18,542 m/s305 - 18,542 m/s5,920 m/s (steel)
Pre-calbrated material setups8888801
User defined material setups2222210
Adjustable gain
High Speed Scan Mode
Differential Mode
Limit alarm mode
Velocity Gauge (VX)
Memory and Data Logging
Standard transducerT-102-3300T-102-2700T-102-3300T-102-2700T-102-3300T-102-2000T-102-2000

All TI-25 Series gauges offer the following common features:
- Selectable measurement in millimetres or inches
- Selectable LED backlight (ON / OFF / Auto)
- Stability/Repeatibillity Indicator, a visual indicator with six-dashes (a full display = stable signal)
- Manual zeroing of probes via integrated probe disk
- All TI-25 series gauges use Dual Element probes
- Automatic v-path / dual path error correction for improved accuracy

(*) Different measurement ranges available depending on material and probes, contact us for more information.
** No self calibration option
Technical terms
Dual element transducers
Display Items
Measuring Limits
Minimum Radius for Convex SurfacesMinimum Radius for Convex Surfaces8.89 mm
Minimum Radius for Concave Surfaces76.2 mm
Minimum HeadroomMinimum Headroom25.0 mm
Minimum Sample DiameterMinimum Sample Diameter3.8 mm
Minimum Substrate Thickness - FMinimum Substrate Thickness - FN/A
Minimum Substrate Thickness - NFeN/A

Related Products

TI-CMX Ultrasonic Thickness Gauge


  • Wide variety of dual-element probes can be used for nearly any application.
  • Bar graph with user-set start end values providing highest resolution around the target thickness value.
  • Measures both thickness of coatings and paint layers, as well as wall thickness (in one measurement)

More details

TI-CMX Ultrasonic Thickness Gauge

TI-MVX Ultrasonic Thickness Gauge


  • The MVX is equipped with multiple viewing options to provide users with a complete set inspection tools: (RF waveform, +/- Rectified waveform, Time based B-Scan, and Large Digits).
  • Built in hardware AGC gain control for through paint measurements in multi mode operation.
  • The MVX has the ability to store 64 custom user defined setups. All factory setups can be selected, edited and saved to any setup location.

More details

TI-MVX Ultrasonic Thickness Gauge

TI-MMX-SDL Ultrasonic Thickness Gauge


  • Equipped with multiple viewing options to provide users with a complete set of inspection tools: (RF waveform, +/- Rectified waveform and Large Digits).
  • The time-based B-Scan feature displays a cross section of the test material. It is commonly used to display the profile of the bottom surface of the test material.
  • Built in hardware AGC gain control for through paint measurements in multi mode operation.

More details

TI-MMX-SDL Ultrasonic Thickness Gauge

TI-007X Ultrasonic Thickness Gauge


  • Scan mode, 100 measurements / second. Drag the probe over a large surface, the smallest measured value during the scan will be displayed.
  • Delivery including NIST traceable calibration certificate
  • 5 year warranty on the gauge

More details

TI-007X Ultrasonic Thickness Gauge

Accessories

A-302-6002: Rubber Protection for TI Series Gauges



    More details

    A-302-6002: Rubber Protection for TI Series Gauges 127313

    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

    Category Dual Element Transducers


    Advanced technology for precision measurements on diverse materials, ideal for challenging industrial environments.

    More details

    Category  Dual Element Transducers 0

    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

    TI-SB Ultrasonic Thickness Gauge Accessories


    • Precision Machined and Finished
    • Includes NIST Report and Test Data
    • Includes Wooden Storage Box

    More details

    TI-SB Ultrasonic Thickness Gauge Accessories 125793

    TI-SB4 Steel Test Block


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

    More details

    TI-SB4 Steel Test Block 126277

    LI-ION Rechargeable AA Batteries


    • Li-Ion rechargeable battery
    • Stable voltage of 1,5 V over 95% of the runtime
    • Charged via the USB to USB-C cable

    More details

    LI-ION Rechargeable AA Batteries 127554

    Specifications

    Measurement range (standard transducer on steel):- TI-25MX, TI-25DLX & TI-25SX: 0.6 -150 mm
    - TI-25MXT & TI-25DLXT: Pulse - Echo 1.00 to 199.9mm, Echo - Echo 2.54 to 25.40 mm
    - TI-25PX & TI-25LTX: 1 - 150 mm
    Resolution:0.01 mm (0.05 mm for TI-25LTX)
    Measurement units:Selectable in millimetres or inches
    Velocity Range:Adjustable from 305 to 18,542 m/s (except TI-25LTX)
    Display:- Large 4.5-digit LCD, character height: 13 mm
    - Selectable backlight (ON/OFF/Auto)
    - Segmented layout for clear display of advanced functions
    Display refresh rate:10 Hz
    Pulse rate:200 Hz (200 pulses per second)
    Probe cable:1.2 m waterproof cable with unpolarised connectors
    Power supply:2 × AA batteries (rechargeable batteries also supported)
    Battery life:Up to 45 hours of continuous use (depending on battery type)
    Operating Temperature Limits:- Environment: -30°C to +75°C
    - Material under test: -20°C to +100°C
    Probes for higher temperatures available on request
    Housing:Extruded aluminium body with nickel-coated end caps, sealed construction
    Dimensions:63.5 × 31.5 × 131.3 mm (L × W × H)
    IP Rating:IP65 rated
    Weight:308 g
    Shipping weight:1.45 kg
    Certification:NIST-traceable and MIL-STD-45662A compliant, CE certified
    Warranty:- Gauge: 5 years
    - Transducer: 90 days

    Buy Now

    Products

    Product
    Price
    Quantity
    136622
    TI-25MX Wall Thickness Gauge
    € 1.565,00 
    136942
    TI-25MX-WOP Wall Thickness Gauge without Probe
    € 1.433,00 
    136624
    TI-25MXT Wall Thickness Gauge
    € 1.786,00 
    137200
    TI-25MXT-WOP Wall Thickness Gauge without Probe
    € 1.654,00 
    136623
    TI-25DLX Wall Thickness Gauge With Data Logging
    € 1.698,00 
    137654
    TI-25DLX-WOP Wall Thickness Gauge With Data Logging Without Probe
    € 1.565,00 
    136625
    TI-25DLXT Wall Thickness Gauge Thru Paint With Data Storage
    € 1.830,00 
    137082
    TI-25DLXT-WOP Wall Thickness Gauge without probe
    € 1.698,00 
    136621
    TI-25SX Wall Thickness Gauge
    € 1.501,00 
    137420
    TI-25SX-WOP Wall Thickness Gauge without Probe
    € 1.348,00 
    136620
    TI-25PX Basic Wall Thickness Gauge
    € 1.297,00 
    136974
    TI-25LTX Steel Only Wall Thickness Gauge
    € 1.114,00 
     
    Accessories

    Product
    Price
    Quantity
    136674
    A-302-6002 - Protective Rubber Boot For TI-Series Small
    € 109,00 
    126766
    V-Block Transducer Holder for 1/4" probe
    € 231,00 
    125846
    TI-SB-4H Steel Test block
    € 374,00 
    125847
    TI-SB-4L Steel Test block Certified NIST
    € 374,00 
    125848
    TI-SB-5L Certified Steel Test Step Block
    € 374,00 
    130190
    TI-SB4 Uncertified Steel Test Block
    € 136,00 
    135573
    CF-AN-125ml Coupling Fluid 125ml Bottle
    € 9,95 
    139547
    Li-Ion Rechargeable AA Batteries - 4 pcs (with USB to USB-C cable)
    € 25,00 
    133746
    CIC-WALL
    € 165,00 
    All mentioned prices are excluding VAT & excluding shipment costs.
    Availability: Available: 1 - 3 days, Delivery time: 1 - 3 weeks, special order request

    Contact 
    Request offer
    Your information request is sent!
    We'll contact you as soon as possible.
     Information