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TI-25LTX Steel Only Ultrasonic Wall Thickness Gauge

Made in USA
TI-25LTX Steel Only Ultrasonic Wall Thickness Gauge
Click images to enlarge.
Measuring Range
0.040 - 6.000 inches
1.00 - 150.0 mm
0.005 inch (0.05 mm)

The Checkline TI-25LTX is a simple to use wall thickness gauge is designed for measuring wall thickness and the extent of corrosion of steel. It is commonly used for checking the thickness of pipes, tanks, plates, and other objects. It is designed and built to withstand harsh industrial conditions and is backed by a 5 year limited warranty.

The TI-25LTX has a fixed velocity of .2330 in/μs. / 5920 meters/sec which is the speed sound travels through common steel. It can't be adjusted for any other materials other than steel.


  • Includes NIST Traceable Calibration Certificate
  • Resolution of 0.005 inch (0.05 mm)
  • The Transducer (probe) is waterproof and can be submerged in shallow water
  • Special-purpose probes are offered for a variety of applications (1 to 10 MHz)
  • Switch-selected units for inches or mm
  • The extruded aluminum housing is impact-resistant and environmentally sealed (IP 65)
    to provide trouble-free operation under the toughest field conditions
  • High visibility LCD Display is readable in all lighting conditions and temps as low as 22 °F (-30 °C)
  • LCD shows Thickness Value, Velocity Setting, Stability Indicator, Battery Indicator and units
  • Acoustic Velocity (calibration) is manually adjusted via the keypad
  • Operates on two (2) AA Batteries - 45 hours continuous operation
  • Selectable Backlight ON/OFF/AUTO
  • Warranty: Gauge: 5 Years Probes: 90 Days
  • Made in USA

Video Demo of the TI-25LTX by Dangar Marine

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Complete Kit

The TI-25LTX is supplied as a complete kit with the gauge, probe, 4 oz. bottle of coupling fluid, 2 AA batteries, NIST-Traceable Calibration Certificate, and Operating Instruction Manual - all in a foam-fitted carrying case.

Measuring Limits

Minimum Radius for Convex Surfaces 0.350" (8.89 mm)
Minimum Radius for Concave Surfaces 3" (76.2 mm)
Minimum Headroom 1" (25.0 mm)
Minimum Sample Diameter 0.150" (3.8 mm)
Minimum Substrate Thickness - F na
Minimum Substrate Thickness - NFe na


Range in Steel0.040-6.000" (1.00-150.0 mm) with standard transducer (probe)
Overall range of gauge is 0.025" up to 36 inches (0.63 up to 914mm)
Depends on transducer
Resolution0.005 inch (0.05 mm)
Display BacklightBacklight is selectable on/off/auto, and selectable brightness (Lo, Med, Hi) options
Velocity Rangefixed at 2330 in/μs. / 5920 meters/sec
Probe (Standard)1/4", 5 MHz Dual Element Transducer, actual wearface is 5/8" (17mm), p/n T-102-2000
Probe WearfacePEEK (Polyethylethylkytone)
Cable1.2m (4ft.) waterproof cable with non-polarized, quick-disconnect connectors
Temp. LimitsAmbient: -30 to 75° C (-22 to 167° F)
Material: -20 to 100° C (0 to 200° F)
High temperature probes available
Battery Type2x AA batteries (rechargeable batteries can be used)
Battery Life45 hours continuous use
Weight308 grams (11 ounces)
Dimensions63.5 x 131.3 x 31.5 mm (2.5" x 5.17" x 1.25")
AccessoriesProbe/cable assembly, 4 oz. bottle of coupling fluid, NIST Calibration Certificate, 2 AA batteries, operating instructions, hard-plastic carrying case.
HousingExtruded aluminum body with nickel-plated aluminum end caps (gasket sealed)
WarrantyGauge: 5 Years
Probes: 90 Days
CertificationsNIST Traceable and MIL-STD-45662A
Housing RatingIP65
KeypadSealed membrane that is resistant to both water and petroleum products
Seven or eight tactile-feedback keys
Probes (optional)1 to 10 MHz, 3/16" up to 1 inch (custom probes available)
LCD DisplayMulti-function 7 segment 4.5 digit liquid crystal display with 0.500" digit height. Two 0.125 in14 segment fields for labels and values, and one 7 segment field for labels and values. Additional icons to indicate features and modes
Display Update Rate10 Hz (10 updates/sec)
Pulse Repetition Frequency (PRF)200 Hz (200 pulses/sec)


Buy Now

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4 Step Steel Test Block, 0.1 / 0.2 / 0.4 / 0.6 inch - Uncertified, supplied in plastic case
SoundSafe Coupling Fluid - 12 oz / 354 ml - NSN: 6635-01-553-0559
V-Block Transducer Holder (For 3/16" & 1/4" Transducers only), F-000-7001
4-pack AA Ni-MH Rechargeable Batteries & Charger Kit
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