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.

About Us

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.


Electrodes - Glass pH/ORP

ASI manufactures a wide variety of glass pH and ORP electrodes that meet the demands of most applications. In addition to our standard models that work in general applications, we also offer models that utilize ground glass joints for dirty applications that might clog the electrode, semi-micro designs intended for applications where the sample is in small vessels like test tubes, and others that are able to be completely disassembled for easy ...

Electrodes - pH/ORP Stems

While many customers are just looking for a reliable electrode, many customers ask us if we are able to supply stem work or sub-assembly product - our answer is absolutely! ASI can offer any level of development work you need - whether you want to just add your own cable or you just want the pH stem, ASI can deliver what you need.


Tooling & Molding - Aurora Scientific Instruments

Aurora Scientific Instruments has experienced continuous growth since it was established in 1995, with considerable growth in our tooling and mold division. To meet the mast stringent industry demands, our facility features the latest in high-tech CNC equipment, capable of sophisticated geometry, multi-contoured surfaces, and high-precision tolerances. When you select the Services of Aurora's tooling and molding division, you also benefit from me ...

ASI Engineering Services

The Engineering Department at ASI works with other ASI departments and ASI customers to provide innovative senior Solutions and related product needs in a wide variety of application In keeping with our vision for the future, we offer cost effective Services that are difficult to find or are cost prohibitive lo most companies. The primary goal of the department is to help ASI become a leading manufacturer of electrochemical sensors and related ...


Pittcon 2012

Company details

Business Type:

Industry Type:
Monitoring and Testing

Market Focus:
Internationally (various countries)

Year Founded:



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