3
1. GENERAL
1.1) APPLICATIONS
The Flexbar Ultrasonic Thickness Gage, Model No. 15947 & 15949 are
designed for measuring the thickness of metals, plastics, ceramics, glass and other
ultrasonic wave conducting materials with two parallel surfaces (top & bottom).
The 15947/15949 can be used in industrial applications to perform precise
measurements on various kinds of materials, parts and components. Additionally, it can
be used to monitor various kinds of pipes and pressure vessels for decreasing thickness
due to corrosion and/or erosion.
1.2) BASIC WORKING PRINCIPLE
The basic principle of the ultrasonic wave in a thickness measurement is similar to that
of an optical wave. The ultrasonic wave pulses are transmitted by the probe face and
are coupled to the object to be measured using a viscous fluid called “couplant”. These
ultrasonic pulses propagate through the measured object and reflect back to the
transducer when they encounter the back surface. The thickness of the object is
determined by precisely measuring the time the ultrasonic wave travels in the object.
2) SPECIFICATIONS
DISPLAY:
FOUR DIGIT LCD DISPLAY
RESOLUTION:
0.01in / 0.1mm &0.001” / 0.01MM
WORKING FREQUENCY:
5MHz
MEASURING RANGE:
.047in – 8.0in (1.2 - 200.0 MM) (STEEL)
LOWER MEASURING LIMIT FOR PIPES:
0.8 X 0.1” or 20 X 3mm (STEEL)
MEASURING ERROR:
+/- (1%H+0.004”) or ±(1%H+0.1)MM
H = actual thickness of the object to be
measured
ADJUSTING RANGE OF SOUND VELOCITY
0.039 to 0.3937in/us or (1000-9999 M/S)
MEASUREMENT OF SOUND VELOCITY WITH
KNOWN THICKNESS VALUE:
MEASUREMENT RANGE:
37-373 MILES/MIN (1000-9999 M/S)
IF THICKNESS IS LESS THAN 0.8” (20mm):
+/- 0.004”H x 100% or ±1mm/H X 100%
IF THICKNESS IS GREATER THAN 0.8” (20mm)
±5%
RANGE OF OPERATING TEMPERATURE:
32-104 DEGREES F (0-40 DEGREES C)
POWER SUPPLY:
TWO AAA BATTERIES
POWER CONSUMPTION:
3 Volts at less than 20MA
Auto Power Off
2Minutes
DIMENSIONS:
4.3 X 2.4 X 0.9IN
WEIGHT:
4.7oz
