About Us

47 years of Excellent Service

Expo Instruments was incorporated in March 1970, and dedicated to make and sell only proprietary equipment. From the beginning, Expo specialized in Liquid Level and Temperature measurement and control.

Since 1970, Expo Instruments has supplied the Process Control industry with Liquid Level and Temperature monitoring and controlling equipment. Our customers include wineries, breweries, food processing plants, hi-tech electronics industry, aerospace industry, chemical plants, water pollution plants, and many more.

Expo Instruments' specialty is Liquid Level Control for virtually any application, from simple sump pump controls, miniature non-contacting sensors, swimming pool wireless, to solar autofill and sophisticated computer data acquisition systems designed to monitor product level and temperature.

Located in the heart of Silicon Valley, Expo manufactures highly reliable and accurate transmitters and probes, utilizing the most up-to-date, state-of-the-art integrated electronics, backed by over 21 U.S. patents.

Expo Instruments is now specializing in custom liquid level sensors and controls, and the new wireless solar autofill. We will help you design your Liquid Level requirements, no matter how simple or complex.