Transducers are the most important components in ultrasonic sensors. They are the transmitter of electrical signals in ultrasound and as receiver convert the minimal pressure fluctuations of the ultrasound in the air into electrical signals.
Ultrasound operates at a frequency beyond human hearing and offers fascinating possibilities. It can determine, in the simplest example, the presence or the distance of an object.
However, acoustic signals can contain even more information. They are capable of providing information on the composition and the motion state of the reflector or the transport medium and to recognise information patterns. With corresponding effort ultrasound can also be employed for orientation and is used as such by bats and dolphins.
A piezoceramic disc is the motor of the transducer and has a significant influence on its quality. In order to meet our own quality standards, we place high demands on our suppliers. This is why we purchase piezoceramic that has been specially tailored to our needs from our main supplier PI Ceramic.
However, equally crucial is the quality of the acoustic adapter material. It is permanently bonded to the piezoceramic and optimises the transmission of the noise between the piezoceramic solid body and the air. In order to achieve the best possible results, we only utilise our own adapter material made of especially light, compressive resistant epoxy, which is subject to only minimal fluctuation in comparison with the products of external producers.
Depending on design, our transducers can work at frequencies between 60 - 600 kHz and can thus achieve a range of between 1 cm and 10 m. High resolution in the millimetre range and high repetition rates < 10ms are possible.
Ultrasound transducers from SECO Sensor are extremely robust, maintenance free and reliable even in the harshest of conditions. They cover a broad temperature range and are insensitive to dust, moisture and many chemicals.
We have vast experience in the reactionless assembly of oscillators in customer-specific casings.