NEW! The FT-3500 Series Flow Meter and Thermal Energy Measurement System

New from ONICON: The FT-3500 Series Insertion Electromagnetic Flow Meter / Thermal Energy Measurement System combines the convenience of an insertion style design with the reliability of electromagnetic flow measurement. They are ideal for measuring flow in a wide variety of applications. When provided with the thermal energy (BTU) meter option, the FT-3500 becomes a complete hydronic energy measurement system.
ONICON’s FT-3500 Series Thermal Energy Measurement System is a versatile insertion electromagnetic flow meter and thermal energy measurement system. It is designed to measure electrically conductive liquids in a variety of applications. The FT-3500 features a remote touch screen display that allows users to interact intuitively with measurement values, application details, and configuration settings. The advanced FT-3500 transmitter features a native BACnet and MODBUS communication protocol via IP or RS485. It also features a dual analog output for flow or energy rate. Additionally, the FT-3500 boasts a high-resolution frequency and three scalable pulse outputs for totalization or alarm signals.

The standard configuration of the FT-3500 is ideal for volume rate and totals. The thermal energy configuration integrates ONICON’s high-precision temperature sensors to provide a complete hydronic energy measurement system. Whether you need to measure flow rate or energy consumption, the FT-3500 series is a reliable and accurate choice.
APPLICATIONS
- Chilled water
- Heating hot water
- Condenser water
- Domestic/municipal water
- Water/glycol

FEATURES
- Simple Installation and Commissioning – Factory configured and ready for use upon delivery.
- Exceptional Performance & Value – Insertion style design provides cost-effective solution for accurate and reliable flow measurement in larger pipe sizes.
- Excellent Long-Term Reliability – Low maintenance, no-moving-parts flow sensing technology works well in difficult flow measurement applications such as open loop condenser water flow.
- Highly Accurate Over a Wide Flow Range – Highly efficient sensor design with high accuracy and sensitivity, particularly at low flow rates.
- Simplified Hot Tap Insertion Design – Standard on every insertion flow meter, this feature allows for insertion and removal by hand without a system shutdown.
- Ideal Solution for Retrofits – The innovative hot tap adapter design allows for wet tapping pipes without interrupting flow.
- Touch Screen Remote Display – All process data and programming functions are accessible via user friendly display. Advanced diagnostics are available to confirm wiring connections, noise detection via waveforms, and built-in verification for accurate system performance. Color coded interconnecting cabling and installation instructions are provided to ensure error-free installation.
- Network Communication and Output – All data is reported via BACnet or MODBUS directly to the BMS/BAS via IP or RS485 connection. The FT-3500 is provided with three (3) pulse outputs for totalization, alarm, and system status; two (2) analog outputs for energy, flow, and temperature; and one (1) frequency output for flow rate.
- BTU (Energy) Meter Option – When ordered with the thermal energy (BTU) meter option, the FT-3500 becomes a complete thermal energy measurement system providing accurate flow, energy, and temperature data.
CALIBRATION
Every ONICON FT-3500 flow meter is wet calibrated in a flow laboratory against standards that are directly traceable to National Institute of Standards and Technology (N.I.S.T.). A certificate of calibration accompanies every meter.
DESIGNED FOR NETWORKING
The FT-3500 provides the user with a single point of communication for BACnet MS/TP, BACnet IP, MODBUS RTU, or MODBUS TCP/IP. Interval data for energy and volume are provided along with operating status and diagnostic data.
FT-3500 alarms can be configured to the upper and lower limits of specific BACnet objects and provide custom alarm states at the meter display. The new BACnet stack includes:
- Stack Modularity: Traditional polling methods of data acquisition are supported and Change-of-Value (COV) notifications report changes to the network on an interrupt basis (without polling)
- Intrinsic Reporting: Provides detailed control for customers to specify when notifications should occur, and additional metrics that can be used for quick diagnosis.
- Foreign Server Registration: Allows a unit to be remotely routed to another BACnet network over IP, relieving the need for the customer to install multiple BACnet clients or routers.
- Advance Network Diagnostics: Network time synchronization for troubleshooting and isolating meters from other facility issues. Network-accessible event logs provide a record of changes and power events for further aid in troubleshooting.
TYPICAL METER INSTALLATION

Notes:
- Provide a Class II Input Power 20-28V AC/DC, 60 Hz.
- BACnet MSTP, IP or MODBUS RTU, TCP/IP.
- Active Analog outputs do not provide power.
- Digital Outputs are available for flow totals, operating modes, and alarms.
- Remote wall mount aluminum cast NEMA 4 Touch screen display.
- Optional ½” FNPT waterproof conduit connectors.
- ONICON provided cable up to 200ft. Direct burial rated.
- Order ONICON Installation kits separately. Installation kits vary based on pipe material and application. For installations in pressurized (live) systems, use “Hot Tap Installation Kit” and drill hole using a 1” wet tap drill.
- Allow enough slack in the flexible conduit to permit the meter to be removed from the valve.
When ordered as a thermal energy (BTU) meter:
- 10. ONICON temperature sensors and thermowell kits ordered separately.
- 11. Analog outputs are available for energy rate, flow rate, supply, return, or delta temperature.
- 12. Digital outputs are available for energy totals, flow totals, operating modes, and alarms.
Interested in learning more about this unique Flow Meter? Download the documents below:
- F-3500 Manual
- F-3500 Di-Directional Manual
- F-3500 Insertion Electromagnetic Flow Meter Catalog Sheet
Or call us today: 763-777-9525 You can also fill out the form below and we will reach out to you.