The FSM-3 Series SuperMag represents the state-of-the-art in electromagnetic water flow measurement. By incorporating the latest in DSP technology, the FSM-3 Series achieves the performance of an inline mag meter with the installation ease and flexibility of an insertion style meter.

ONICON’s FSM-3 Series SuperMag Flow Meters are ideally suited for the demanding flow measurement requirements associated with today’s High Performance HVAC Industry applications. The FSM-3 will interface directly with the BAS/EMS system.

The FSM-3 is available in four fixed insertion pipe sizes, 6”, 8”, 10”, and 12”. Every FSM-3 is hand insertable up to 400 psi and hot tappable – no system shut down required!

The FSM-3 is designed to integrate seamlessly with an ONICON BTU meter, creating a complete, cost effective and incredibly accurate energy measurement system.


Features include:

  • Exceptional Performance & Value - Cost effective insertion style design provides the accuracy and reliability found in inline mag meters.

  • Multiple Outputs - Three programmable pulse outputs and one analog output are provided with each meter.

  • Simple Installation and Commissioning - Factory programmed and ready for use upon delivery. All process data and programming functions are accessible via front panel display and keypad.

  • User-friendly Interface - Commissioning is easy via the back-lit display and smart button technology. No special configuration tools needed!




The OAM II airflow measuring system provides accurate flow measurement in challenging outdoor air applications, as well as other airflow applications with limited straight ducts. The system consists of a dedicated multifunction transmitter with precision ultra-low differential pressure transducers and our proprietary uni-sensor airflow sensor.

Four analog outputs and native BACnet® or MODBUS® are included standard. Displayed data includes flow, temperature, velocity, dP, absolute pressure and operating status. This data is also provided to the network.


Features include:

  • Extended Flow Range Capability - All OAM II measurement configurations provide a 24:1 range of measurement - Well suited for variable flow applications.

  • Multiple BAS Interface Options - The OAM II includes four field configurable analog outputs and one RS485 interface for native BACnet MS/TP or MODBUS RTU.

  • Color Graphic Display with Interface - The backlit flow display can also provide temperature, velocity or dP data. The user interface has easy to use menu pages that eliminate the need for special tools.

  • Air Density Correction - The OAM II is provided with a temperature sensor and an internal absolute pressure sensor for air density correction - Enabling the OAM II to perform active density compensation and output actual or standard volumetric flow.