TI-25 Series Wall Thickness Gauges
Important Note: The TI-25MX, TI-25MXT, TI-25DLX, TI-25DLXT, TI-25SX, TI-25PX and TI-25LTX models are now part of the TI-25 Series. All specifications, comparisons, and pricing of the TI-25 Series are provided below.
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.
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.
| TI-25MX | TI-25MXT | TI-25DLX | TI-25DLXT | TI-25SX** | TI-25PX** | TI-25LTX** | |
|---|---|---|---|---|---|---|---|
| Display |  |  |  |  |  |  |  |
| Keypad |  |  |  |  |  |  |  |
| Measurement Range with standard transducer on steel (*) | 0.63 -150 mm | Pulse - Echo 0.63 to 199.9mm, Echo - Echo 2.54 to 25.40 mm | 0.63 -150 mm | Pulse - Echo 0.63 to 199.9mm, Echo - Echo 2.54 to 25.40 mm | 0.63 -150 mm | 1 - 150 mm | 1 - 150 mm |
| Resolution | 0.01mm | 0.01mm | 0.01mm | 0.01mm | 0.01mm | 0.01mm | 0.05mm |
| Measurement modus | Pulse-Echo | Pulse-Echo / Echo-Echo | Pulse-Echo | Pulse-Echo / Echo-Echo | Pulse-Echo | Pulse-Echo | Pulse-Echo |
| Material velocity range | 305 - 18,542 m/s | 305 - 18,542 m/s | 305 - 18,542 m/s | 305 - 18,542 m/s | 305 - 18,542 m/s | 305 - 18,542 m/s | 5,920 m/s (steel) |
| Pre-calbrated material setups | 8 | 8 | 8 | 8 | 8 | 0 | 1 |
| User defined material setups | 2 | 2 | 2 | 2 | 2 | 1 | 0 |
| Adjustable gain | |||||||
| High Speed Scan Mode | |||||||
| Differential Mode | |||||||
| Limit alarm mode | |||||||
| Velocity Gauge (VX) | |||||||
| Memory and Data Logging | |||||||
| Standard transducer | T-102-3300 | T-102-2700 | T-102-3300 | T-102-2700 | T-102-3300 | T-102-2000 | T-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 |
|||||||
 | Minimum Radius for Convex Surfaces | 8.89 mm |
| Minimum Radius for Concave Surfaces | 76.2 mm | |
 | Minimum Headroom | 25.0 mm |
 | Minimum Sample Diameter | 3.8 mm |
 | Minimum Substrate Thickness - F | N/A |
| Minimum Substrate Thickness - NFe | N/A |
Related Products
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-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-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
Accessories
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
Category Dual Element Transducers
Advanced technology for precision measurements on diverse materials, ideal for challenging industrial environments.
More details
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
TI-SB Ultrasonic Thickness Gauge Accessories
- Precision Machined and Finished
- Includes NIST Report and Test Data
- Includes Wooden Storage Box
More details
TI-SB4 Steel Test Block
- Uncertified Steel Test Block
- For convenient confirmation of thickness gauge calibration
More details
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
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 |
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Availability: Available: 1 - 3 days, Delivery time: 1 - 3 weeks, special order request
Availability: Available: 1 - 3 days, Delivery time: 1 - 3 weeks, special order request