Piezoelectric buttons withstand the harshest environments: the food and beverage industry, professional kitchens, hospitals, laboratories and pharmaceutical industries, the mining industry, oil and gas or even parking machines or car wash.
But what makes piezo buttons a solution you should really consider for your application?
The piezoelectric effect (du grec “Piezein”, appuyer, presser) was highlighted in 1881 by the Curie brothers.
This is the property of certain bodies (such as quartz, topaz, ceramic, certain crystals and polymers) to become electrically polarized under the action of a force deforming them (direct effect); reciprocally to deform when an electric field is applied to them (Indirect effect).
C’est cet effet Direct qui est mis en application dans les boutons piezoélectriques : la pression du doigt appliquée sur la surface du bouton fait “plier” très sensiblement l’élément piezo installé sous cette dernière (imaginer une peau de tambour). Le cristal piezo convertit ce changement d’état mécanique en signal électrique qui est amplifié par l’électronique embarquée dans le corps du bouton. Cette brève impulsion de type “marche” peut varier en fonction de la pression appliquée; des pressions plus élevées génèrent des tensions plus élevées qui mettent plus de temps à se dissiper. Un condensateur peut être utilisé pour stocker la charge afin d’allonger la constante de temps de fermeture du circuit et donc la longueur de l’impulsion.
The VPM (Versatile Piezo Module)
The technology used in the buttonsTactHill and everswitch is based on a single VPM assembled mechanically without the use of adhesives, glues or welding - which age over time and environmental variations (ambient temperature, humidity level, etc.). The VPM is encapsulated in a custom-designed, industry-standard one-piece metal housing giving our buttons one of the best levels of reliability and durability on the market.
The main advantage of piezo buttons is, in reality, twofold:
- no moving partsand therefore mechanical wear induced by friction forces. This property also avoids the presence of a gap between the key and the body of the button, likely to encourage the penetration of liquid into the body of the button.The Tacthill and Everswitch buttons are waterproof IP68/IP69K on the front.
- no electromechanical contact = pas d’arc électrique évitant ainsi le risque de “charbonnage” du contact dans la durée.
These characteristics make piezo buttons extremely reliable switches with an almost unlimited lifespan – more than 50 million cycles have been tested! -.
Versions certified according to the ATEX2014/34/EU directive are also offered in the Everswitch range for use in explosive environments.
Furthermore, the integration and wiring of the piezo buttons is particularly simple since their operation is similar to that of a dry contact!
Typical variations include a pair of red wires (for the dry contact) and if the button is illuminated one, two or three other pairs of wires for powering the LED(s).
Our piezoelectric buttons are mainly used in applications in the food industry and the medical environment because they are extremely resistant to repeated cleaning with detergents and high pressure.
They are also perfectly suited to the nautical industry (boats, yachting, underwater exploration equipment), the swimming pool and spa market (jacuzzi, hammam, sauna) and even car wash centers.
Generally speaking, piezoelectric buttons are ideal for all applications that involve intense, repeated use and subject to the strictest environmental conditions.
Pools & Spas
Parkings
Yachting & Marine
Car wash
Medical
Piezo button dia.22mm
Black aluminum piezo button, diameter 22mm
20.42€The initial price was: €20.42.16.90€The current price is: €16.90. HTSale!
Piezo button LUPO dia. 30mm
Piezo button • illuminated • IP68 & IP69K • diameter 30mm Versions...
Piezo button LUPO dia. 22mm
Piezo button • illuminated • IP68 & IP69K • diameter 22mm Versions...
from29.50€ HTPiezo button LUPO dia. 19mm
Piezo button • illuminated • IP68 & IP69K • diameter 19mm Versions...
from16.83€ HT
