Teledyne API

Teledyne API (TAPI) is a global leader in the design and manufacture of precision air quality and industrial gas monitoring instrumentation located in San Diego, California, USA. Our instruments are used worldwide in ambient air quality monitoring systems (AQMS), continuous emissions monitoring systems (CEMS), and industrial process applications. Our analyzers comply with U.S. Environmental Protection Agency (EPA), European Union (EU), and other global regulatory agencies for the measurement of criteria pollutants including NOX, SO2, CO, O3, PM10 & PM2.5. We also provide a variety of precision Zero Air Generators and Calibrator instruments for both standard and trace-level applications. Our industrial gas portfolio includes ozone analyzers, generators, sensors and turnkey ozone delivery systems for gas or solution based 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:


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.

In October 2001, the company merged with Teledyne Technologies Incorporated (NYSE:TDY) to become Teledyne API. To this day, Teledyne API continues to operate as an independent business unit within Teledyne Technologies, with all operations based at our state-of-the-art facility in San Diego, California, USA.

Today, Teledyne API 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 instruments and world-class customer service.

For more information, please visit our website:

For Gas Measurement:

  • UV Fluorescence (SO2, H2S, TRS)
  • Chemiluminescence (NO, NO2, NOx, NH3, O3)
  • NDIR - Non Dispersive Infrared (CO, CO2, N2O, SiF4, WF6 )
  • Gas Filter Correlation
  • Light Absorption
  • UV Light Absorption (O3)
  • Cavity Attenuated Phase Shift Spectroscopy

For Ozone Generation:

  • Corona Discharge
  • Air Cooled and Water Cooled

For Particulate Measurement:

  • Beta Attenuation
  • Optical Particle Counting