Logo Made in Germany electronica China & productronica China / LASER World of PHOTONICS CHINA 2018


Booth number: 5845

About us

Swiss engineering and the most modern manufacturing systems

ELESTA GmbH looks back on a company history rich in tradition. Our roots go back to the founding of ELESTA Elektrotechnik AG in 1952, where until 1996 a number of innovations were implemented, among other light-optical sensors, measuring and control systems and relays.

1997 ELESTA relays GmbH was founded as a manufacturer of relays with forcibly guided contacts according to IEC 61810-3. In 2013 the company was renamed ELESTA GmbH. We are part of the PILZ GmbH & Co. KG group of companies.

We develop and manufacture products in three areas:

  • Relays with forcibly guided contacts

  • Miniature Optical Encoders

  • Customer-specific sensors

    In our location in Bad Ragaz / Switzerland we currently employ 273 individuals. All our products are designed and manufactured in our location.

    Our company operates according to Lean principles. Our goal is continuous improvement in all areas of the company and the further development of our products to the benefit of our customers.

Products and services

We develop and produce relays with forcibly guided contacts according to IEC 61810-3 and miniature optical encoders.

E OI R 007 optical miniature encoder

E OI R 007 optical miniature encoder

The E OI R007 is a 3-channel optical incremental encoder in an aluminium housing with a length of 13 mm and a diameter of 7 mm. Equipped with two precision ball bearings, the system ensures a high degree of smooth running and a long service life at speeds up to 85,000 rpm. It has a unique code wheel design with high precision reflective system. An outstanding benefit is the low current consumption. It is designed to have a low sensitivity to installation tolerances.

SIS & SIF relays with forcibly guided contacts

SIS & SIF relays with forcibly guided contacts

This are very compact relays with forcibly guided contacts in accordance with IEC 61810-3. In addition to their very small dimensions, this relays stands out thanks to their high shock resistance, large exciting voltage range and low coil loss power, as well as their high switching reliability due to the notched crown contacts.

SIR & SIP relays with forcibly guided contacts

SIR & SIP relays with forcibly guided contacts

Powerful relays with forcibly guided contacts in accordance with IEC 61810-3 for switching loads up to 10 A or 16A. They have crown contacts for high switching reliability.

News & Innovations

Optical encoder EOI R007 by ELESTA in 7mm miniature housing 

ELESTA GmbH has added a 3-channel optical encoder in an aluminium housing to its product portfolio of miniature encoders. With a length of 13mm and a diameter of 7 mm, it is one of the smallest encoders of this type which is currently on the market.

Equipped with 2 precision ball bearings it guarantees high smooth running and a long service life at speeds of up to 80,000 rpm.

In the housing is the patented encoder system of the EOI R by ELESTA. The integrated system operates on the basis of a new optical focussing incident light method. Reflective parabolic shaped concave mirror segments form the code segments of the code wheel. The resulting concentration and reflection of the light of the transmitter LED allows for the light source to only emit very little light to still ensure very steep signal edges and a high resolution even at high speeds. The encoder delivers 128 pulses at any rotation speed to two outputs that are phase shifted by 90°. The third channel provides one index pulse per revolution.

The signal quality and accuracy across the entire speed range is very exact.

Due to the design of the encoder it operates with 4 mA current at a voltage of 5 V and is therefore also interesting for battery-powered applications. The housing is mounted by grub screws and securely braced against rotation. Coupling of the encoder with commercial clutch elements for connection to motors, gearboxes or the like are just as straightforward as the adaptation of potentiometer knobs with clamps or fixing screw. The chamfered output shaft has a diameter of 2 mm and is flattened at two sides.

The encoder housing also serves for preliminary evaluation of individual solutions in which the encoder system should be integrated in customer-specific systems or housing. Extensive design-in support is also available.


Felix-Wankel-Str. 2
73760 Ostfildern

Phone: +41 81 3035400

Kayla, Wildhaber
Officer Inside Sales
Phone: +41 81 3035480

Heuteilstr. 18
7310 Bad Ragaz

Phone: +41 81 3035400
Fax: +41 81 3035401

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