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TI-UMX2 Underwater Ultrasonic Thickness Gauge

Made in USA
Click images to enlarge.
Measuring Range in Steel
0.025 - 19.99 inches
0.63 - 508.0 mm

The new CHECK-LINE TI-UMX-2 Underwater Wall Thickness Gauge accurately measures the wall thickness of all metals, extent of corrosion and the thickness of coatings on them -- at depths of up to 1000 feet (300 Meters).

A back-lit LCD display and illuminated housing allow divers to easily read measurements in dark water.

An over-sized control button and clever menu structure allows easy gauge setup and navigation through menus above or below water even when wearing thick gloves.

The TI-UMX-2 can store up to 5000 readings including A-Scan Waveforms and settings for each individual measurement. There are 2 file structure options; sequential with auto identifier and alpha numeric grid (row/column) format. The UMX-2 can transfer data and configuration settings to a PC using our DataComm software. (Software and transfer cable included)

Velocity Settings
The TI-UMX2 has 8 preset velocities and 1 custom velocity allowing the user to customize it for specific applications, or to tune the calibration to be optimized for a specific type of material. The list of preset velocities are as follows:

  • 1. Aluminum 2024
  • 2. Stainless Steel 302
  • 3. Steel4340
  • 4. Iron
  • 5. Cast Iron
  • 6. PVC
  • 7. Polystyrene
  • 8. Polyurethane
  • 9. Custom 1


  • Includes NIST-Traceable Calibration Certificate
  • Housing is rated for dive depths up to 1000 ft (300 meters) with backlit display
  • Resolution of 0.001" (0.01 mm) with user-selected units of inch or mm
  • Includes built-in datalogger for 5000 readings, settings and waveforms in sequential or "grid" (row/column) format
  • Automatic probe recognition and auto zero
  • Supplied with data transfer cable and FREE data analysis software
  • Measure modes include: Pulse-Echo, Pulse-Echo w/ Coating, Echo-Echo and Triple Echo
  • Measures BOTH Wall and Coating Thickness
  • Both Dual Element and Single Membrane Probes are offered
  • Standard Probe supplied is 1/2"-5MHz HD-Coating, Underwater p/n T-074-2906
  • All settings for gauge and datalogging can be done via software if desired
  • CE-certified
  • Warranty: Gauge: 3 Years Probes: 90 Days
  • Made in USA

TI-UMX2 Menu Structure

Use of single button and clever menu structure permits easy navigation through all settings when underwater
*Highlighted fields indicate default settings.

Note: TCG mode (Triple-Echo Verify) is only available when T-9441-2809 probe is connected to TI-UMX2 Gauge.

Related Products

Underwater Coating Thickness Gauge
Click image for more info
PosiTector® 6000 Underwater Coating Thickness Gauge
- Two year warranty on gage body AND probe


Range in SteelPulse-Echo Mode:(P-E) Pit and Flaw detection measures from 0.025 - 9.999inches (0.63 to 254 millimeters)

Pulse-Echo Coating Mode (PECT): (Material, Coating, Pit & Flaw Detection): Material: 0.025 to 19.999 inches (0.63 to 500 mil
Resolution.001" (0.01 mm)
Velocity Range8 fixed and 1 programmable Material Velocities
.0492 to .5510 in./µs (1250 to 13995 m/sec)
PreSet Velocities1. Aluminum 2024 - 0.2510 in/µs
2. Steel 4340 - 0.2330 in/µs
3. Stainless Steel 302 - 0.2230 in/µs
4. Iron - 0.2320 in/µs
5. Cast Iron - 0.1800 in/µs
6. PVC - 0.0940 in/µs
7. Polystyrene - 0.0920 in/µs
8. Polyurethane- 0.
ProbeSTANDARD: Underwater Type, 1/2"-5MHz Dual-Element HD-Coating Probe
OPTIONAL: Underwater Type, 1/2"-3.5MHz Dual-Element HD-Coating Probe
MEMBRANE: 1/2"-5MHz Single-Elelent Contact Type Probe
OTHER: Dual Element Typ
Display4½ - Digit, 0.5" Backlit LCD
(2nd Display for menus, 3/8" 6 character LCD)
BacklightingBoth Displays can be user set for ON/OFF/AUTO
Cable4 ft. (1.2 m) waterproof cable with non-polarized, quick-disconnect connectors. Optional lengths up to 50 ft. (15 m).
ConnectorsLemo, Underwater Type
Battery TypeThree (3) 1.5V AA alkaline batteries (or 1.2V NiCad)
Battery LifeBACKLITE OFF, typical
50 hours on alkaline (15 hours on NiCad)
BACKLITE ON, typical
15 hours on alkaline (8 hours on Nicad)
Accessories IncludedVelcro wrist strap, 4 oz. bottle of coupling fluid, AA batteries, NIST-Traceable Calibration Certificate, data transfer software, serial output cable with USB converter and spare gasket & lube kit including Operating Instruction Manual - all in a foa
DataloggerGRID or SEQUENTIAL data storage
Capacity: 5000 wall & coating readings, settings and waveform graphics
Data OutputBi-directional RS232 serial port, with USB converter. Windows® PC interface software
Operating ModesPE: Pulse-Echo
PECT: Pulse-Echo Coating
EE: Echo-Echo
EEE: Triple Echo TCG
(requires T-9441-2809 MEMBRANE Probe)
PulserDual square wave pulsers
ReceiverDual receivers - manual or AGC gain control with 110dB range (limited)
Manual GainLimited to 5 gain settings (vlow, low, med, high, vhigh (42 to 50 dB)
Temp. LimitsAmbient: -20 to 140° F (-30 to 60° C)
HousingHigh strength transparent plastic
IP 68 Waterproof Rating
Depth Rating: 1000 feet (300 meters)
KeypadSingle button, magnetically coupled switch
SizeLength (9.0 in/229 mm)
Diameter (2.375 in/60.33 mm)
Weight1.5 lbs (680g) - with 3 AA batteries
WarrantyGauge: 3 Years
Probe: 90 Days
CertificationCE Approved, Factory calibration traceable to national standards

Complete Kit

The TI-UMX2 is supplied as a complete kit with the gauge, Standard Transducer P/N T-074-2906, Velcro wrist strap, 4 oz. bottle of coupling fluid, 3-AA batteries, NIST-Traceable Calibration Certificate, data transfer software, serial output cable with USB converter and spare gasket & lube kit including Operating Instruction Manual - all in a foam-fitted carrying case.


Buy Now

Item Description Price
Underwater Ultrasonic Thickness Gauge kit with T-074-2906 probe, Z-185-0001
Underwater Ultrasonic Thickness Gauge kit with T-9441-2809 probe for Triple-Echo Mode (TCG)
1/2" diameter, 5.0 MHz dual element transducer, hi-damp, coating, for TI-UMX2, Top in, Potted
1/2" diameter, 3.5 MHz dual element, high-damp coating probe for TI-UMX2
1/2" diameter, 5 MHz single element, membrane probe for TI-UMX2
Maintenance Kit (includes 2 O-rings and 6 grams of lubricant)
4-pack 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.