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Measuring Range in Steel
0.025 - 6.00 inches
0.60 - 150.0 mm

The new CHECK-LINE TI-25DL accurately measures wall thickness and the extent of corrosion of all metals, ceramics, glass and most rigid plastics - from only one side!

The TI-25DL incorporates a built-in memory for 1000 data points that can be separated into 10 separate "batches." The stored data can be downloaded to a serial printer or a personal computer. A Windows compatible data transfer program is supplied at no additional cost.

5 year warrantyThe gauge can be used in a Single Thickness Reading mode or in two alternative modes, the Scan mode and the and the Differential mode. The Scan modes permits the user to "drag" the probe over a large measuring area where the minimum thickness encountered during the scan will be displayed. The Differential mode displays the difference ("+" or "-") from a set "nominal" value


  • Resolution of 0.001" (0.01 mm)
  • Selectable units of inch or mm
  • Large, backlit LCD display retains last reading
  • RS-232C Serial output for downloading stored data to a printer or computer
  • Memory for 1000 data points in up to 10 batches
  • Special-purpose probes are offered for a variety of applications
  • Windows compatible data transfer program supplied at no additional cost.
  • CE Certified
  • Includes NIST-Traceable Calibration Certificate
  • Made in the USA
  • IP 65 Rated

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Certified Steel Test Blocks
- Includes NIST Traceable Calibration Cert
- Precision Machined and Finished
- Includes Wooden Storage Box
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Protective Holder for Ultrasonic Gauges
- Constructed from heavy duty Cordura Nylon
- Built-in belt loop
CF12 Sound Safe Ultrasonic Couplant
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Coupling Fluid
- Temp Range: 0 - 200 °F, -18 - 93 °C
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50 Foot Underwater Probe / Cable Assembly
- 50 Ft. Length, Waterproof Probe/Cable assembly with non-polarized, Dual-Lemo connectors.
ultrasonic trandsducer holder v-block
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Ultrasonic Transducer Holder
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Portable Printer for TI-25DL
- Small, portable and easy to use
- Prints statistical data from the TI-25DL Ultrasonic Wall Thickness Gauge
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Software for Thickness Gauges

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 Steel0.025-6.00" (0.60-150.0 mm)
Resolution.001" (0.01 mm)
Velocity Range0.0492 to .3937 in/μs. 1250 to 10,000 meters/sec
Display4½ - Digit, 0.5" Backlit LCD
Probe7.5 MHz, 0.25" Diameter (6.35 mm)
Probe WearfacePEEK (Polyethlethylketone)
Cable4 ft. (1.2 m) waterproof cable with non-polarized, quick-disconnect connectors. Optional lengths up to 50 ft. (15 m).
Serial OutputRS-232C (8, N, 1, user-set baud rate)
Temp. LimitsAmbient: -20 to 120° F (-30 to 50° C)
Material: --ll0 to 200° F (-20 to 100° C
Special high temperature probes are optionally available.
Battery TypeTwo AA batteries
Battery Life200 hours
Weight7 ounces (196 g)
Size2.5 x 4.5 x 1.25"
(64 x 114 x 32mm)
Accessories IncludedProbe/cable assembly. 4 oz. bottle of coupling fluid, NIST Calibration Certificate, 2 AA batteries, operating instructions, hard-plastic carrying case.
WarrantyGauge: 5 Years
Probes: 90 Days

Complete Kit

The TI-25DL is supplied as a complete kit with the gauge, probe, 4 oz. bottle of coupling fluid, 2 AA batteries, NIST-Traceable Calibration Certificate, data transfer software, RS-232 output cable, RS-232 to USB adapter and Operating Instruction Manual - all in a foam-fitted carrying case.

Special Purpose Models

Model Description
TI-25DL-H High Temperature for surfaces up to 650° F or 343° C
TI-25DL-107 Cast Iron / Plastics
TI-25DL-HW Heavy Wall (0.040-19.999")


Buy Now

Item Description Price
Replaced by TI-25DLX Data Logging Ultrasonic Wall Thickness Gauge Kit with T-102-3300 Probe
Replaced by TI-25DLX Data Logging Ultrasonic Wall Thickness Gauge kit with High-Temp (650 F / 344 C) T-044-2000 Probe, CF4H High Temp Coupling Fluid Highly Recommended
Replaced by TI-25DLX Data Logging Ultrasonic Wall Thickness Gauge kit with T-104-1000 probe for Cast Iron and Plastics
Replaced by TI-25DLX Data Logging Ultrasonic Wall Thickness Gauge kit with T-104-2000 probe for Thick Walls
Replaced by TI-25DLX Data Logging Ultrasonic Wall Thickness Gauge WITHOUT PROBE.
Protective Holder for Most TI Series Gauges, F-112-0005
V-Block Transducer Holder (For 3/16" & 1/4" Transducers only), F-000-7001
4 Step Steel Test Block, 0.1 / 0.2 / 0.4 / 0.6 inch - Uncertified, supplied in plastic case
Coupling Fluid - 12 oz / 354 ml
High Temp Coupling Fluid 4 oz / 118 ml (0 - 600 F / -18 to 316 C)
High Temp Coupling Fluid 4oz (600 - 780 F / 316 - 404 C)
1/4" diameter, 7.5 MHz, dual element transducer (Standard Probe for TI-25DL)
1/4" diameter, 5 MHz, dual element transducer
1/4" diameter, 2.25 MHz, dual element transducer
1/2" diameter, 2.25 MHz dual element transducer
1/2" 5.0 MHz Hi-Temp (650 F / 344 C) Transducer
1/2" diameter, 5.00 MHz dual element transducer
1/4", 5 MHz Hi-Temp (900 F / 500 C) Transducer
4-pack 2300mAh AA Ni-MH Rechargeable Batteries & Charger Kit
In stock
1 Week Lead Time (Estimated)
2-3 Week Lead Time (Estimated)
Lead Time Varies, Please contact us for availability.