The ultrasonic Pulse/Echo principle uses the round-trip travel time of a sound wave through the part wall to measure thickness.
Sampling, cutting coupons, disassembly, or destroying your part are no longer necessary.
And you can measure thickness anywhere on your part with access to only one side.

• Using a single element delay tip transducer, the unit is capable of reading thin metals down to 0.006 inches (0.15 millimeters) without removing the paint in Echo-to-Echo Mode

• The WT-700 series automatically switch the measurement mode between Echo-to-Echo Mode and Interface-Echo Mode when they are in Auto Mode.

• The units are loaded with the features usefully used in the operating fields, such as Alarm Mode, Differential Mode, Data Output, and Internal Data-Logging (only for the WT-720). They are simple and easy to operate.

  Click to Download : WT-700Series Catalog

  Click to Download : WT-710 Basic Operation Manual

  Click to Download : WT-720 Basic Operation Manual

• Being packaged in an all aluminum sealed case, the WT-700 series are resistant to the harsh working environment.

• The unit retains all of its settings even when the power is off due to its special memory function.

Alarm Mode :If the measurement falls below your minimum specified value or is over your maximum specified value, the red LED will illuminate and the beeper will sound. The green LED will illuminate to indicate an acceptable thickness measurement.

Differential Mode: The unit will display the positive(+) or negative(-) difference from the value entered.

Data Output:RS-232 output sends data to a serial printer, a computer or other external storage device.

Internal Data Logger (only for the WT-720): Automatic Data Logging system with 1,000 reading capacity (10 files of 100 readings each)

Scan Mode: The unit will display the thinnest reading it found at a rate of 8 readings per second.

1. WT-710 or WT-720 Thickness Gauge
2. WT-SSD1575 15MHz 1/4 inch Delay tip
3. WT-A01-N Aluminum Case
4. WT-C35-N Couplant (4 oz. bottle)
5. Operating Manual
6. Factory Certificate of Calibration

WT-720 Package
7. Data Acquisition software
8. Cable

WT-700 Series Specifications

Operating Principle

Ultrasonic Echo/Echo


Single Element with Delay Tip
5 ~ 25 MHz Frequency Range
Lemo Connector
4 foot (1.2 meters) Cable
Custom Transducers Available upon Request

Measurement Modes

Auto-Switchable Measuring Mode (Echo-to Echo Mode and Interface-Echo Mode), Scan Mode, Differential Mode, Alarm Mode

Measuring Range

0.0060 to 1.397 inches (0.15mm ~ 35.50mm) in steel

Measuring Resolution

0.0001 inch (0.001mm)

Material Velocity Range

0.0492 ~ 0.3937 in/μs (1,250 ~ 10,000 m/s)

Display Type

Multi-function 4.5 Digit LCD with 0.500 inch numerals, Backlight is selectable on/off/auto (illuminates only when taking a measurement), Measurements displayed in inches, inches/microsecond, millimeter, and meters/second, Bar graph indicates stability of reading

Display Language


Power Supply

2 x 1.5V alkaline (150 hours) or
2 x 1.2V NiCad AA cells (100 hours)

Auto Shut-Off

After 5 minutes of non-use

Data Logger Memory (WT-720)

Up to 1,000 readings

Number of Data Group (WT-720)

Up to 10 files

Data Output Port

Data Bits-8, Parity-None, Stop Bits-1, Baud Rate: 1,200 RS232

Operating Temperature Range

+15℉ ~ +125℉(-10℃ ~ +50℃)

Dimensions (W x H x D)

2.5” x 4.5” x 1.24” (63.5mm x 114.3mm x 31.5 mm)


10 ounces with batteries (0.28kg)


A full one-year warranty on parts and labor