Analytical Sensors & Instruments, Ltd. (ASI)

Analytical Sensors & Instruments Ltd. provides innovative, high quality electrochemical sensors to users and OEM customers worldwide. The ASI team can provide you with unlimited designs for measurement in a wide variety of applications including medical, environmental monitoring, process monitoring and control, education, recreational water purity monitoring and others. For users, ASI stocks a variety of popular models of pH, conductivity, dissolved oxygen and ion selective electrodes. In addition, ASI engineers and sales professionals can design custom solutions to satisfy even the most complex and challenging projects.

Company details

12800 Park One Drive , Sugar Land , Texas 77478 USA

Locations Served

Our Distributors

Business Type:
Industry Type:
Monitoring and Testing
Market Focus:
Globally (various continents)
Year Founded:

ASI owes her humble beginning to her founders, Peter and Yuxian Cai. In 1989 Peter and Yuxian started ASI in the garage of their own house. Prior to the founding of ASI, Peter and Yuxian each had already spent 25 years working for electrode manufacturing companies, learning and contributing to the progression of this industry. Yuxian was trained as a glass blower for various pH bulbs in China and has trained all glass blowers at ASI and Aurora.

Starting with a handful of electrode designs, Peter and Yuxian set out to develop different glass formularies to differentiate ASI from the competition. Today, ASI has 5 regularly used pH formulas, one sodium formula, 24 ion selective electrode formulas, 4 ORP (Redox) formats, and close to 10 conductivity designs and many other techniques that Peter and Yuxian have developed at ASI to satisfy our customer needs.

In 1989, ASI only had two employees working in a converted home garage. Today ASI employs over 170 employees worldwide with offices in Texas, Colorado, and Shanghai, China with a total manufacturing space of 40,000 square feet. ASI also has two engineering groups and a fully functioned R&D lab to service our customers in the US and abroad. To meet our customer needs, the plastic molding shop in Shanghai has the full capability of custom mold manufacturing and design as well as plastic injection for high quality but small volume plastic parts. The plastic molding shop has been one of the fastest growing segments of ASI business over the past few years.

We would like to thank all our customers for their years of loyalty and we look forward to many more years of providing them customers with great customer service, quality, and affordable products as well as worldwide engineering and manufacturing services.