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Otter Controls Limited was founded in 1946 to manufacture 'snap-action' thermostats under a new and fundamentally different patent for a three legged bimetal blade which, in various developed forms, is still in use today.

The Otter Group which is still a privately owned British company consists of manufacturing plants in two locations in the United Kingdom. Our Head Office is in Buxton, Derbyshire, together with one of the manufacturing plants. The other Otter factory is located in St Davids (South West Wales).


Otter Controls Limited is committed to the supply of products and services that conform fully to the customer requirements. To achieve this we are dedicated to the continuous improvement of products and services and operate a documented quality system to comply with the requirements of BS EN ISO 9001:2000. We will build quality into our products and services from the original design through all the commercial and production processes to final despatch. Every link within the organisation has a commitment to satisfying its own internal customer requirements.


The concept behind the Otter bimetallic switch was developed during the 1940's when Otter’s founder first experimented with bimetal controls to provide thermostats for electrically heated flying suits.

This bimetal concept was subsequently applied to the problem of a warning light on a Rover car and the prototype led to a new and fundamentally novel patent.

Otter Controls Limited was founded in 1946 to utilise this patent which has led to over one and a half billion switches being manufactured in over fifty years.

Since those early days Otter has remained independent and has become synonymous with quality, reliability and innovation.


The continued success of Otter is a result of dedicated service to the customer. Otter® (a registered trademark worldwide) supply products to over 40 countries via a strong network of well established Otter trained representatives who are supported by a dedicated Sales and Commercial Department utilising the very latest communication technology (Video Conferencing and Email etc).

Otter, who are approved to BS EN ISO 9001:2000, work in partnership with major international companies, offering a complete package of technical and marketing support from the concept stage, through modelling and prototype test phase and on to production.

All testing of new or existing customer applications is undertaken free of charge and in complete confidence, ensuring that the optimum solution is offered and that the end product complies with international standards.


Otter lead the field in technology solutions for customer specific applications, pioneering new control concepts, new materials, and utilising new automation techniques, thus ensuring the quality of design, engineering and production demanded by the world market.

Otter Controls are fully committed to their goal of progress and excellence and are confident that with its own innovation, independence and ability to react quickly to market needs will continue at the forefront of the domestic appliance and automotive industries well into the Millennium.