Wasco's line of Ultra High Purity (UHP) products are designed and manufactured to meet the stringent requirements needed to perform in the corrosive Semiconductor manufacturing environment. Wasco's Quality Management System aligns perfectly with the CE (Copy Exact) demands of the Semiconductor market.

As a supplier of switches to the semiconductor market for over 40 years, Wasco's experience, high quality standards, customer responsiveness, product customization and short lead time is unmatched by our competition.

The UHP series switches utilizes a Class 100 clean room to house manufacturing operations. The UHP series incorporates materials that meet or exceed the Ra finish requirements demanded by the Semi F20 standard. Wasco is your partner in developing high value solutions for your application needs.

Since 1987, Wasco has been supplying the semiconductor market with Ultra High Purity (UHP) sensing solutions. Our customers use our UHP products in wafer fabrication equipment (gas boxes, gas sticks, chamber pressure) and facilities equipment (gas cabinets, gas panels). Wasco is ISO 9001:2015 certified, and our products are both UL recognized and CE compliant. Together, our team has over 100 years of combined experience in providing sensing solutions to the semiconductor market. 

We engineer, manufacture, and sell pressure switches that are temperature resistant, reliable, robust, and cost-effective.

At Wasco, we know that you want to feel confident in the specification process. To do that, you need a pressure sensor that meets your requirements. Most companies don’t take the time to understand the complexity of your system.

We believe it shouldn’t be so difficult. We understand how complicated the specifying process is because we’ve specified and sold hundreds of thousands of pressure sensors for customers in the fire suppression industry since 1995.

Contact us today to stop wasting time and money, and instead get exactly what you need, precisely when you need it.  

1. Tell us what you need
2. Review the specifications
3. Place an order

We design and manufacture our sensors for ultra high purity and highly corrosive environments found in next-generation semiconductor processing equipment. Rated for millions of cycles, our sensors have materials available that meet or exceed SEMI F20 (UHP) with a critical pitting temperature performance of > 35ºC. All switches, transducers, and gauges are helium leak tested to ≤ 1 x 10^(-9) std cc/sec Helium (per SEMI F1). 5Ra internal surface finish. Multiple fittings, connections, and customizable options are available. 


Gas Boxes 

IGS Gas Panels 

Gas Distribution Systems 

Gas Cabinets 

Etch & Deposition Systems 

Series Commonly Used In The Semiconductor Industry


Ultra High Purity Superior

Corrosion Resistance Switches


Ultra High Purity Superior Corrosion

Resistance Switches For Low Pressure


Ultra High Purity Pressure Switches

ISO 5 Clean Room Assembly


Super Purity Vacuum Switches

All-Welded Stainless Steel

UHP Transducer

Ultra High Purity Pressure Transducers


Ultra High Purity Vacuum Switches

ISO 5 Clean Room Assembly


Super Purity Pressure Switches

All-Welded Stainless Steel



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