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 2.5-65

SPECIFICATIONS

Working wave type shear
Operating frequencyMHz2.5 ± 0.25
Entry angle in steel°65.0 ± 1
Arrowmm10.0 ± 1
Single delay timeµS4.0 ± 0.25
Reserve of sensitivity (according to GOST 14782-86)dBNot less 40
CapacitypF1900 ± 200
Piezocrystalmmdisc Ø12
Internal circuit of correction Not available
Internal protection against electromagnetic interference and noise Available
Connector Lemo series 00
Overall dimensions (L×W×h)mm37×18×23 ± 1 with horizontal connector
36×18×24 ± 1 with vertical connector 
Working surfacemm27×15
Weightgr22 ± 2
Operating temperature range°СOperating temperature range;°С;-20…+90
Allowed time of the continuous contact with subject of control from Т°=180°С is up to 1 minute
Средняя наработка до отказаhrNot less 1500
Средний путь проходаm8000
 -20 dB-6 dB-3 dB
Pulse durationµS1.0 ± 0.150,59 ± 0,07 
Bandpass rangeMHz3.2 ± 0.21.7 ± 0.2 
Bandwidth on -20 dB%130 ± 2070 ± 15 
Directional diagram width°23.5 ± 1.511.0 ± 17.0 ± 0.5

MEASUREMENT CONDITIONS

Generator pulse bipolar rectangular one period 100V 0.4µs (the duration corresponds to the period of nominal frequency 2.5 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 44 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 value

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