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 Thickness Gauge >> ST-3 Ultrasonic Thickness Gauge(NDT, ultrasound, ultrasonic, measure)
ST-3 Ultrasonic Thickness Gauge(NDT, ultrasound, ultrasonic, measure)
Precise thickness
Thickness Gauge
    Product Readme

Single-crystal delayed probe is employed by ST-3 precise ultrasonic thickness gauge. The multi-echo is used to enhance the accuracy with the resolution of 0.0001in and the low limit of 0.012in. There are two operating modes of ST-3 ultrasonic thickness gauge: I-E (interface-echo) mode and E-E mode. The measuring range of I-E mode is 0.059in-0.709in, while the measuring range of E-E mode is 0.012in-0.394in.
The operating principle of ST-3 is: THICKNESS= (VELOCITY × TIME)/n   Note: n is the number of times of the echo. The more echoes, the higher the accuracy.

Standard package:
ST-3 thickness gauge
Standard probe (single-crystal delayed probe)
Carrying case
Two 1.5V AA alkaline batteries
Operating manual
Certification of quality
Packaging list
Operating principle:
I-E (interface-echo) mode with single-crystal delayed probe
E-E (echo-echo) mode with single-crystal delayed probe
Measuring range:
1.5mm to 18mm; 0.059in-0.709in in I-E mode
0.25mm to 10mm; 0.012in-0.394in in E-E mode
Depending on probe, material and surface condition
Digital resolution:
H<0.4in : 0.0001in/ 0.001in/ 0.01in or 0.001mm/0.01mm/0.1mm
H≥0.4in : 0.001in/ 0.01in or 0.01mm/0.1mm
Selectable: inch or mm
128×64 dot-matrix LCD screen (1.65in×2.24in; 42mm×57mm)
EL backlight and switchable contract ratio
Digit height: 0.54in or 13.75mm
Measurement update rate:
4 Hz in standard measurement mode
25 Hz in MIN capture mode
Material velocity range:
1000 to 9999 m/s; 0.039 to 0.394 inch/µs
Two 1.5V AA alkaline batteries
Warning with low battery voltage
Operating time:
Up to 200 hours (without backlight) with alkaline batteries, depending on operating mode
Auto shut-off:
After 5 minutes of non-use
Operating temperature:
-10℃ to +50℃; +14℉ to +122℉
Specification to -20℃/-4℉ on request
5.86in×2.87in×1.25in; 149mm×73mm×32mm (H×W×D)
200g; 7oz (including batteries)
Data logger capacity:
Up to 500 readings can be divided into a maximum of 5 files (user-selectable)
Optional accessories:
Attachable rubber case
Numerous special probes on request
Couplants and high-temperature couplant
4-step/6-step block for calibration
Data transmission cable
Application software
Operating language:
English and Chinese
Application software:
Serial RS 232C port in combination with a communicative cable;
Data transfer parameters: 8 bits, 1 stop bit, 9600 baud, no parity.

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