Teledyne-API (TAPI) designs and builds precision air quality monitoring instruments at our factory located in San Diego, California, USA. Our products are used worldwide in ambient air quality monitoring systems (AQMS), continuous emissions monitoring systems (CEMS), and industrial process applications. Our analyzers comply with United States Environmental Protection Administration (EPA), European Union (EN), and other global regulatory agencies for the measurement of criteria pollutants including NOX, SO2, CO, O3, PM10 & PM2.5, among others. We also provide a variety of precision Zero Air Generators and Calibrator instruments for both standard and trace-level applications. Through consistent delivery of high quality instrumentation and superior customer service we have become a global leader in the markets we serve.

Company details

9970 Carroll Canyon Road , San Diego , California 92131 USA

Locations Served


Our Distributors

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

Teledyne API offers a complete line of Air Quality Monitoring (AQM) instrumentation, which complies with the US Environmental Protection Administration (US EPA), European Union (EN), and other requirements for the measurement of ambient air quality.

Utilizing proven measurement principles, we also offer instruments for Continuous Emissions Monitoring (CEM), and a number of other applications, including Clean Room Monitoring, Contamination Monitoring, and Industrial Process Monitoring/Control.

Quality Policy

“We satisfy our customers by using our Quality Management System to define, measure and improve our products and services.”

This policy represents a primary objective for our business success. We recognize that quality is the result of conscientious dedication by every member of our organization.  It begins with the visualization of a product and extends through its material selection, processing, handling, and delivery to the customer.

This policy shall be achieved by the implementation and maintenance of a documented Quality System.  This Quality System shall satisfy the requirements of ISO 9001 in addition to TAPI's inherent commitment to defining, measuring, and managing quality.

The company was founded in San Diego, California in 1988 as Advanced Pollution Instrumentation (API) to provide precision gas analyzers for Air Quality Monitoring (AQM) applications.  From the beginning, the company continued to develop and expand its range of instruments, the applications they serve, and the geographic location of its customers.

In October 2001, the original company merged with Teledyne Technologies, Inc. to become Teledyne API, also known as Teledyne-API, or simply as ‘TAPI’.  To this day TAPI continues to operate as an independent business unit within Teledyne Technologies, with all operations (including product development, manufacturing, sales, and customer service) centered at a dedicated, modern facility in San Diego.

Today TAPI offers a broad range of gas analyzers, monitors, and process control instruments.  We continue to be a global leader in Ambient Air Quality Monitoring applications, but have also established leadership in Continuous Emissions Monitors for stationary air pollution sources, and in specialized instruments for the measurement and control of ozone gas in a variety of industrial applications. However, our precision gas instruments are also found in many other applications including clean-room monitoring, contamination monitoring, gas purity applications, etc.

In recent times, we have begun to complement our range of gas analysis instruments with a growing range of particulate monitoring instruments for Ambient Air Quality Monitoring applications.

Our products are sold and supported on a global basis through a network of expert partners operating in more than 80 countries. Across the globe the Teledyne API name is synonymous with high quality products and world-class customer service.

At the end of July 2016, TAPI moved to a new manufacturing facility in the Scripps Ranch area of San Diego. The new offices and manufacturing space is 50 percent larger than our previous offices and offers a more efficient layout, upgraded manufacturing and R&D lab space areas, as well as significantly increased meeting areas to support our training and customer relations needs. The move will support our continued growth and expansion, underscoring TAPI’s commitment to both our customers and our employees.