ULTRASONIC TRANSDUCERS FOR NON-DESTRUCTIVE

DEVELOPMENT AND PRODUCTION

"3T" LLC   тел.: +7(495)972-33-03, +7(916)115-63-98
email: info@3tsensor.com

SENDAST 5.0-75

SPECIFICATIONS

Working wave type shear
Operating frequencyMHz5.0 ± 0,5
Entry angle in steel°75.0 ± 2
Arrowmm8.0 ± 1
Single delay timeµS3.4 ± 0.25
Reserve of sensitivity (according to GOST 14782-86)dBNot less 50
CapacitypF650 ± 100
Piezocrystalmmdisc Ø6
Internal circuit of correction Not available
Internal protection against electromagnetic interference and noise Available
Connector Lemo series 00
Overall dimensions (L×W×h)mm32×13×21 ± 1 with horizontal connector
31×13×22 ± 1 with vertical connector 
Working surfacemm22×11
Weightgr12 ± 2
Operating temperature range°С-30…+90 °С. Allowed time of the continuous contact with subject of control from Т°=180°С is up to 1 minute
The average time to failurehrNot less 1500
The average passage waym8000
 -20 dB-6 dB-3 dB
Pulse durationµS0.55 ± 0.080.29 ± 0.04 
Bandpass rangeMHz6.0 ± 0.62.7 ± 0.3 
Bandwidth%120 ± 2060 ± 15 
Directionla diagram width°29.0 ± 1.516.5 ± 112.5 ± 0.5

MEASUREMENT CONDITIONS

Generator pulse bipolar rectangular one period 100V 0,2µs (the duration corresponds to the period of nominal frequency 5,0 MHz)
Pull-up resistor 50 Ohm parallel
The connection cable – wave resistance is 50 Ohms, length is 1 m
Ultrasonic calibration block СО-3: Steel 20, speed of a sound wave is CS=3239m/s CL=5935m/s ТS.TIME DELAYS ALONG THE RADIUS↑↓=33,91 µs ТL.TIME DELAYS ALONG THE RADIUS↑↓=18,50 µs
Ultrasonic calibration block СО-2: Steel 20, speed of a sound wave is CS=3228 m/s CL=5910 m/s

NOTE

Entry angle in steel (according to GOST 14782-86) – is determined on a calibration block СО-2 by reflection from a hole of Ø6 mm at a depth of 15 mm

Sensitivity reserve (in accordance with GOST 14782-86) – the relation signal/noise. The relation of the maximum amplitude of an echo signal in calibration block СО-3 to the peak noise level of the off-load transducer in the range of time of 29 - 39 µS (the interval of time corresponds to a time delay equivalent to CO-3 block radius ± 5 µS)

The pulse-echo duration by level of  -6 dB - time interval during which the value of the envelope of the pulse-echo exceeds the level of  -6 dB of its maximum value

The pulse-echo duration by level of  -20 dB - time interval during which the value of the envelope of the pulse-echo exceeds the level of  -20 dB of its maximum valu

Bandpass range by the level  -6 dB - the difference between the upper and lower cut-off frequency of the amplitude frequency response by the level  -6 dB from the maximum value of the amplitude frequency response

Bandpass range by the level  -20 dB  - the difference between the upper and lower cut-off frequency of the amplitude frequency response by the level  -20 dB from the maximum value of the amplitude frequency response

Bandwidth by level of  -6 dB is the ratio of the bandpass by the level  -6 dB to the frequency of the maximum amplitude frequency response. Expressed in %

Bandwidth by level of  -20 dB is the ratio of the bandpass by the level  -20 dB to the frequency of the maximum amplitude frequency response. Expressed in %

The average passage way is a resource of transducer rectilinear displacement along the steel surface with a roughness of Rz40, pressure of 1 kg, with applying contact liquid