We excel at helping OEMs solve problems.

Presair was acquired by Senasys in 2014. At that time, we moved production from New York to our facilities in Eau Claire, Wisconsin.

Senasys supports other original equipment manufacturers worldwide in a variety of industries such as food service, medical, industrial and agriculture.

We provide our customers with flexibility and top of the line customer support to be sure your needs are met.

We excel at helping OEMs using small to large volume of devices solve switch problems related to temperature, pressure/vacuum, air flow, and more.

With our in-house fabrication shop, we have the ability to customize our products to meet requirements, whether it’s a specific bracket specification to meet fit requirements, terminal connection and more.

With producing over a million switches annually, Senasys has two facilities located in Eau Claire, Wisconsin, U.S.A., along with partnerships overseas to provide more economical solutions to our customers.

Most of our products carry worldwide approvals of UL, cUL, RoHS, and REACH directives.

End users are still able to buy directly from us. We have many common parts available on our website.

Contact us with your switching requirements!

A few things we’re great at

Custom Products

Senasys designs and builds products to meet the needs of original equipment manufacturers. Send us your requirements and our team will work with you to build the component you need.

Competitive Pricing

We offer discounted OEM and bulk pricing options, as well as wholesaling pricing for distributors.

Fast Lead Times

Senasys aims to meet the shortest lead times in the marketplace for all our product lines. And if those aren’t fast enough, we offer a variety of expedite options to our customers.

Great Customer Service

When you call Senasys, you are directed straight a human to help you with technical support and/or ordering questions.

get in touch

Our office hours are:

Monday – Friday

8 a.m. to 4 p.m. CST

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Our Story

Senasys is a US based manufacturer that was founded in 1999 with three employees in a few hundred square feet we have grown to over fifty employees and 30,000 sq ft.

From the patriot missle system to commercial food preheaters our products are used through out a wide range of industries in environments from (-50°F to 700°F).

We believe in providing customers with quality products with reasonable pricing and lead times. We make a wide range of temperature switches. These include bimetal, duct sensing, and fluid filled capillary style thermostat switches. We also manufacture a line of pressure switches.

We excel at helping OEMs using small to large volume of devices solve switch problems related to temperature, pressure/vacuum, air flow, and more. 

Our Core Values

Attention to Detail



Problem Solving



Our Brands

Senasys supports and finds solutions for niche manufacturing products in the electro-mechanical industry. With our industry knowledge and direct customer service, we can support other original equipment manufacturers globally. See our additional brands below!

Visit a website below to learn more!

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    Our office hours are

    Monday – Friday

    8 a.m. to 4 p.m. CST


    A Division of Senasys

    1435 International Drive

    Eau Claire, WI 54701 U.S.A.

    +1 (715) 831-6353


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