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TI-44N Ultrasonic Wall Thickness Gauge

Made in Japan
Click images to enlarge.
Measuring Range in Steel
0.040 - 8.00 inches
1.00 - 200.0 mm

The new CHECK-LINE TI-44NA Ultrasonic 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 attractive, ergonomic housing design is extremely compact, lightweight and rugged. It fits comfortably in the palm of your hand and incorporates a back light that illuminates the LCD in poorly lit areas. This product is similar to our TI-45N, however the probe is hard-wired to the gauge and is NOT removable as in the TI-45N.


  • NIST-Traceable Calibration Certificate & Test Report is optionally available
  • TI-44NA includes new Pipe Mode for stable measurement on small diameter pipe (1" and larger)
  • Resolution of 0.001" (0.01mm) with Switch-selectable units of inches or mm
  • Extremely small & lightweight operating from a single AA battery.
  • Fixed-mounted probe is connected to gauge with one meter flexible cable (39")
  • Built-in calibration test plate on front of gauge housing
  • Quick display update with last reading retained on the display
  • Display symbols alert user to poor coupling and low battery conditions
  • Warranty - Gauge 1 year Probe 90 days
  • Made in Japan

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Ultrasonic Wall Thickness Gauge
- Resolution of 0.001" (0.01mm)
Certified Steel Test Blocks
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Certified Steel Test Blocks
- Includes NIST Traceable Calibration Certificate
- Precision Machined and Finished
- Includes PLASTIC Storage Box
SB4 & SB6 Uncertified Steel Test Blocks
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Ultrasonic Test Blocks without certification
- Fabricated from 1018 Steel or 304 Stainless Steel
- ISO Calibration OPTIONAL
CF12 Sound Safe Ultrasonic Couplant
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Coupling Fluid
- Temp Range: 0 - 200 °F, -18 - 93 °C

Complete Kit

The TI-44NA is supplied as a complete kit with the gauge and wrist strap, probe and cable assembly, 2 oz. bottle of coupling fluid, battery and instruction manual -- all supplied in a cardboard pack as shown.

Measuring Limits

Minimum Radius for Convex Surfaces 1" (25.4 mm)
Minimum Radius for Concave Surfaces 3" (76.2 mm)
Minimum Headroom 3" (76.2 mm)
Minimum Sample Diameter 0.5" (12.7 mm)
Minimum Substrate Thickness - F na
Minimum Substrate Thickness - NFe na


Range in Steel0.040 - 8.000" (1.0 - 200.0 mm)
Resolution.001" (0.01 mm)
Display4½ - digit LCD display, 0.39" (10mm) high with push button illumination
Velocity Range3,250 - 39,000 ft/sec
(1,000 - 12,000 m/sec)
continuously adjustable
Probe5 MHz, .39" (10 mm) diameter
Cable39" (1m) 2-wire, long cable with fixed-mounted to gauge body
Minimum Pipe Size1" nominal (30mm) steel pipe
Temp. LimitsAmbient: 25 to 125° F (-5 to 50° C)
Material: -15 to 140° F (-10 to 60° C)
Calibration Plate0.250" (6.35mm) steel plate, built into the front of the housing
Battery Type1x AA battery
Battery Life200 hours
WeightGauge: 7 ounces (200 g)
Size5.2" x 2.7" x 1.1"
(131 x 68 x 29 mm)
WarrantyGauge: 1 years
Probe: 90 days
Accessories Included2 Ounce bottle of couplant


Buy Now

Item Description Price
Ultrasonic Wall Thickness Gauge kit with integrated 5mhz, 10mm probe
Replaced by model TI-44NA
NIST Traceable Calibration Certificate
4oz Coupling Fluid for Bolting Gauges - V-000-0005
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.