Web Orders Over $100 Ship Free. Enter Promo Code "SHIPFREE" for free UPS Ground Shipping at Checkout. (USA Only)


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

The CHECK-LINE TI-45NA 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.


  • NIST-Traceable Calibration Certificate & Test Report is optionally available
  • TI-45NA includes new Pipe Mode for stable measurement on small diameter pipe (1" and larger)
  • Resolution of 0.001" (0.01mm)
  • Extremely small & lightweight operates from a single AA battery
  • Switch-selectable units - inches or mm
  • Built-in calibration test plate
  • Quick display update with last reading retained on the display
  • Display symbols alert user to poor coupling and low battery conditions
  • TI-45N-HD includes slip-on, ergonomic rubber sleeve for improved grip and additional physical protection
  • User Adjustment of Acoustic Velocity or selection 10 preset velocities
  • Warranty: Gauge: 1 year Probe: 90 days
  • Made in Japan

Related Products

Click image for more info
Ultrasonic Wall Thickness Gauge
- Resolution of 0.001" (0.01mm) with Switch-selectable units of inches or mm
Certified Steel Test Blocks
Click image for more info
Certified Steel Test Blocks
- Includes NIST Traceable Calibration Certificate
- Precision Machined and Finished
- Includes PLASTIC Storage Box
SB4 & SB6 Uncertified Steel Test Blocks
Click image for more info
Ultrasonic Test Blocks without certification
- Fabricated from 1018 Steel or 304 Stainless Steel
- ISO Calibration OPTIONAL
CF12 Sound Safe Ultrasonic Couplant
Click image for more info
Coupling Fluid
- Temp Range: 0 - 200 °F, -18 - 93 °C
Click image for more info
5mhz, 10mm Transducer for TI-45N and TI-40N Ultrasonic Thickness Gauges
- 5mhz, 10mm Probe
- 39" Cable with 2 LEMO 00 Connectors
Click image for more info
Centering Shell for CS-5Z10NDT Probe

Complete Kit

The TI-45NA 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 fitted, hard plastic carrying.

Measuring Limits

Minimum Radius for Convex Surfaces 1" (27 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 Range1,000 - 12,000 m/sec, continuously adjustable
Probe5 MHz, .39" (10 mm) diameter without Centering Shell
Cable39" (1m) 2-wire, long cable with quick-disconnect connectors
Minimum Pipe Size1" nominal (27mm) steel pipe, wall thickness starting at 0.060" (1.50 mm)
Temp. LimitsAmbient: 25 to 125° F (-5 to 50° C)
Material: -15 to 140° F (-10 to 60° C)
Calibration Plate0.200" (5.00mm) 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)
Accessories IncludedFitted, hard-plastic carrying case, probe shell attachment, 2 oz. bottle of coupling fluid, 1 spare battery and operating instruction guide
WarrantyGauge: 1 years
Probe: 90 days


Buy Now

Item Description Price
Replaced by model TI-45NA
NIST Traceable Calibration Certificate
4oz Coupling Fluid for Bolting Gauges - V-000-0005
5mhz, 10mm Transducer for TI-45NA, TI-45N and TI-40N Ultrasonic Thickness Gauges
CS-5Z10NDT Centering Shell
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.