Through Paint Ultrasonic Thickness Gauges

Wall Thickness Gauges Model TI-25MMX, TI25DLMMX, with data logging measures wall thickness and subtracts coating thickness

The new TTIMX-25 Wall Thickness Gauge accurately measures wall thickness and the extent of corrosion of all metals, ceramics, glass and most rigid plastics - from only one side!
The MMX versions work in either pulse echo mode - the standard mode for most wall thickness gages - or in echo-echo mode. In echo-echo mode the reciever listens for the second rebound echo resulting from the coating and uses this data to figure out the coating thickness.


  • Measuring Range in Steel
    Pulse-Echo Mode (Pit & Flaw Detection) measures from 0.025 to 19.999 inches (0.63 to 500 millimeters)(with EXT probe )
    Echo-Echo Mode (Through Paint & Coatings) measures from 0.1 to 1 inch (2.54 to 25.4 millimeters)(standard probe )
    (range depends upon probe selected)
  • Wall thickness on hard materials including corrosion of tank walls, piping and hull plates
  • Inspection of metals including steel, cast iron ( malleable, and spheroidal graphite ), aluminium, copper, brass, titanium, sheet metal, storage tanks, ships, structures and piping systems.
  • Inspection of non-metals including glass, ceramics and hard plastics (except acrylic resin)
  • Direct readout of thickness inches or mm
  • Automatic subtraction of coating thickness mode (Echo to Echo mode) (MMX models)
  • Built in test plate
  • Calibrate for a wide range of rigid materials
  • Scan mode for surveying large areas
  • Data Logging option
  • Acoustic velocity table for common materials included

NIST calibration stepUltrasonic thickness gauges use sound wave to measure wall thickness. Different types of materials have different inherent acoustic velocities. ( sound travels at different speeds through different materials ).For example the acoustic velocity of steel is 0.2330 inches/microsecond and that of aluminum is 0.2500 inches/microsecond. The TI 25MMX can be set to any acoustic velocity depending on the material being measured. The instruction book includes a table of acoustic velocities for common materials. Even if you don't know the acoustic velocity or your material you can measure it with the TI25 provided you have a sample of material of known thickness to start with. Picture to the right shows a NIST certified calibration stepped block.

Related product Basic wall thickness gauge 
wall thickness gauge

The DL versions  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 included.

Specifications TI25MMX and TI25DLMMX
Range* 0.025-6.00" (0.60-150.0 mm)
see specs for special probes below
Resolution .001" (0.01 mm) (.0001", 0.001mm for 007 type)
Display 4½ - Digit, 0.5" Backlit LCD
Velocity Range 0.0492 to 0.3937 inches./usec (1250-10,000 m/sec.)
Probe 5 MHz, 0.25" Diameter (6.35 mm) with rubber molded grip.
Wearface PEEK (Polyethlethylketone)
Cable 4 ft. (1.2 m) waterproof cable with non-polarized, quick-disconnect connectors. Optional lengths up to 50 ft. (15 m).
Test Block 0.250" (6.35 mm) steel plate built in to the front of housing.
Temp. Limits Ambient: -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 Type Two AA batteries
Battery Life 200 hours
Minimum headroom 1.0" ( 33mm)
Minimum Sample diameter 0.150" (3.8 mm)
Minimum radius Convex - 0.35" (8.89 mm)
Concave - 3.0 " (76.2mm)
Serial output RS232C (8, N, 1, user set baud rate)
Weight 100 ounces (280 g)
Size 2.5 x4.5 x 1.25"
(64 x 114 x 32 mm)
Accessories Included Probe/cable assembly. 4 oz. bottle of coupling fluid, NIST Calibration Certificate, 2 AA batteries, operating instructions, hard-plastic carrying case.
Warranty Gauge: 5 years
Probe: 90 days
Serial output RS232C data logging unit only (TI-25DL)


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

Standard Kit TI-25 $1695.00
With Data Logger    $2250.00

Ordering Information You can order these products on line  Add item to shopping cart
Model Maximum Coating Minimum Wall Maximum Wall Price US$ 
All models in standard
(Pulse-Echo) mode
0.20" (0.50mm) 0.100 (2.53mm) 6.0" 152.4mm  
TTI-25M MMX Standard 0.40"(1.00mm) 0.100" (2.54mm) 1.00" (25.4mm) $1,695.00
TTI-25M MMX EXTended 0.80"(2.00mm) 0.200" (5.08mm) 5.00" (127 mm) $1,695.00
TTI25M- MMX-H standard with high temp probe 0.40"(1.00mm) 0.100" (2.54mm) 1.00" (25.4mm) $2150.00
Data Logging Versions
TTI-25MMXDL logger as above $1,995.00
TTI-25MMX EXT DL as above $1,995.00
CF12 Coupling fluid 12 ozs   $30.00
SB-4 step non certified 2.54 | 5.08 | 10.16 | 15.24 mm   $125.00
SB-4H 4 step calibration block 0.250/0.500/0.750/1.00 "   $395.00
SB-4L 4 step calibration block 0.040/0.060/0.080/0.100 "   $395.00
TICC-M Protective holder for   $75.00