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Sonotrodes

They transmit the mechanical vibrations into the sample. The radiating surface is only at the tip, not at the sides. A high amplitude means particularly intensive sonication and increased wear on the horn. Due to their geometry, the sonotrodes achieve multiple amplitude amplification and thus achieve the highest ultrasound power densities Features in liquids.

Maximum amplitudes with high-quality sonotrodes

The horn functions in an ultrasonic homogeniser as a mechanical "velocity transformer" with which the amplitude of the active transducer can be substantially increased or decreased at constant total power. With a significant reduction in cross-section from the input to the tip surface of the horn, the ultrasonic amplitude is amplified many times over and can reach peak values of over 300 µm. In principle, continuous outer contours running according to a mathematical function must be taken into account when changing the cross-section, because they have a great influence on reactive power losses and thus on the efficiency of the sonotrode. The transformation is ultimately technologically limited by dynamic material limit values and the shape-dependent distribution of the vibration-strain stress in the material.

Sonotrodes for HD4000

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Name
Order no.
Diameter [mm]
Length* approx. [mm]
Amplitude HD 4050/4100/4200
Amplitude HD4400
Volume HD 4050 [ml]
Volume HD 4100 [ml]
Volume HD 4200 [ml]
Volume HD 4400 [ml]
3750
13
5
-
/
80
/
128
-
-
20-200
20-900
-
3745
13
130
-
/
82
/
132
-
-
20-200
20-900
-
3743
6
128
70
/
155
/
210
-
May 75
10-100
10-350
-
3744
9
126
58
/
130
/
185
-
10-100
15-100
10-500
-
3742
4,5
133
90
/
195
/
235
-
Mar 50
May 75
5-100
-
3741
3
147
118
/
245
/
280
-
Jan 25
Mar 50
May 90
-
3740
2
157
125
/
260
/
-
0,5-20
Feb 25
-
-
3748
25
153
-
/
-
/
50
-
-
-
30-1000
-
3746
16
137
-
/
-
/
90
-
-
-
25-900
-
3747
19
145
-
/
-
/
68
-
-
-
25-900
-
3752
13
139
-
/
-
/
242
-
-
-
100-750
3753
16
132
-
/
-
/
196
-
-
-
250-1000
3754
19
129
-
/
-
/
142
-
-
-
250-1500
3755
25
130
-
/
-
/
82
-
-
-
500-2000
3759
25
254
-
/
-
/
-
-
-
-
500-2000
3756
32
136
-
/
-
/
59
-
-
-
500-2500
3757
38
144
-
/
-
/
42
-
-
-
500-3000

Sonotrode extensions

For extending the working length and bridging distances in tall vessels. They are mounted on the homogeniser between the step or booster horn and the titanium plate.
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Order no.
Diameter [mm]
Length* approx. [mm]
3666
13
125
500
13
124
415
25
127

Example video

Mounting of sonotrode and titanium plate on a SONOPULS ultrasonic homogeniser from BANDELIN