Who we are

ONICON Incorporated has been delivering market leading flow and energy measurement products since 1987. For over 30 years we have been delivering quality engineered flow and energy measurement instruments for hydronic heating and cooling systems.

Our broad range of product solutions are wet-calibrated, fully programmed for your application, and ready to use right out of the box. This attention to detail simplifies installation and maximizes performance. Our flow meter technologies include: electromagnetic, turbine, ultrasonic, thermal, and vortex. We also offer BTU (energy) meters that integrate flow inputs from the technology of your choice.

We maintain extensive sales coverage by highly trained and knowledgeable application engineers and industry focused manufacturers representatives who understand the HVAC customer’s unique requirements and needs. Most importantly, ONICON is a service-oriented organization with an unsurpassed commitment to customer satisfaction.

More about us


  • Turbine Flow Meters
  • Electromagnetic Flow Meters
  • Vortex Flow Meters
  • Clamp-on & Inline Ultrasonic Flow Meters
  • Thermal Mass Flow Meters
  • BTU Energy Meters

Major Markets Served

  • Commercial HVAC


ONICON Incorporated

11451 Belcher Road South
Largo, Florida  33773 USA

Phone: +1 (727) 447-6140
Fax: +1 (727) 442-5699



Where we are located