Clamp-On BTU & Thermal Energy Meter | Small Pipe HVAC Flow Sensor | F600
The F600 Ultrasonic Flow & BTU Meter is an all-in-one thermal energy metering solution engineered specifically for small commercial and industrial HVAC lines. Combining transit-time ultrasonic flow measurement with paired PT1000 temperature sensors, the F600 accurately calculates instantaneous heat/cool rates and net thermal energy consumption without opening the pipe.
Designed for line sizes from DN15 to DN40 (inner diameters 12mm to 40mm), its rugged IP65 enclosure houses both the acoustic transducers and a high-resolution 256×128 graphic LCD display. It is the definitive choice for heat pump optimization, chilled water monitoring, and commercial energy auditing.
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Key Highlights:
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Combined Flow & BTU Metering: Measures liquid velocity, temperature difference, and thermal energy (BTU/kWh) simultaneously.
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Integrated PT1000 Temperature Inputs: Supports built-in or external temperature sensors for precise energy calculation.
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Small-Pipe Optimization: Designed specifically for DN15 to DN40 (ID 12mm to 40mm) commercial HVAC runs.
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High-Resolution Graphic Screen: Clear 256×128 pixel backlit LCD display.
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Non-Invasive IP65 Housing: Quick clamp-on setup with durable aluminum and plastic composite construction.
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Description
Precision Thermal Energy Calculation for Small-Pipe HVAC Systems
Monitoring energy efficiency in commercial hydronic heating and cooling systems requires more than just flow rates—it requires accurate temperature differential tracking. The F600 combines transit-time ultrasonic technology with high-precision PT1000 temperature inputs to provide real-time BTU and thermal energy metering.
By clamping directly onto external pipe walls, the F600 eliminates the need for hot-tapping, inline turbine meters, or system draining. Its single-enclosure format contains all necessary signal processing algorithms to translate fluid velocity and temperature deltas into actionable energy consumption data (kWh, BTU, GJ).
Ideal for Energy Auditing & Sub-Metering
As building energy regulations tighten, plant managers and HVAC consultants need non-intrusive tools to evaluate performance. The F600 fills the gap for small commercial lines feeding fan coil units, heat pumps, chillers, and secondary loop heat exchangers.
Primary Applications
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Chilled & Hot Water Systems: Real-time thermal energy metering for commercial chillers, heat exchangers, and boiler loops.
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Heat Pump Efficiency Tracking: Monitoring flow, delta temperature, and COP on residential or light commercial heat pump installations.
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Fan Coil Units & Air Handlers: Sub-metering individual HVAC terminal units (DN15–DN40 lines) for precise tenant billing or energy audits.
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Hydronic Heating & Solar Thermal: Non-invasive monitoring of glycol mixtures and hot water circulation loops.
Features
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Integrated BTU & Flow Computation: Simultaneously calculates volumetric flow rate, supply temperature, return temperature, and cumulative energy usage.
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Precision PT1000 Temperature Sensor Support: Features inputs for high-accuracy PT1000 temperature probes (built-in or external options) for tight delta-T measurements.
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Clear 256×128 Graphic Display: Large illuminated graphic display renders real-time flow curves, temperature data, and totalized energy values in an easy-to-read layout.
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Compact Single-Enclosure Architecture: Streamlined IP65 housing integrates electronics and ultrasonic sensors into a unified body for simple installation on tight pipe runs.
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Zero Pressure Drop & Leak Risk: Clamp-on mounting prevents line pressure loss, fluid contamination, or degradation over time.
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Industrial Communication Ready: Standard RS485 (Modbus RTU) protocol allows direct integration into Building Management Systems (BMS) and energy logging platforms.
Specification
| Parameter | Technical Specification |
| Model |
F600 Ultrasonic Flow / BTU Meter |
| Measurement Type |
Transit-time ultrasonic flow & thermal energy calculation |
| Pipe Size Range |
DN15 to DN40 (Inner Diameter: 12 mm to 40 mm) |
| Temperature Inputs |
Dual PT1000 RTD inputs (Built-in or External sensor options) |
| Display Unit |
256 x 128 graphic backlit LCD display |
| Enclosure Rating |
IP65 aluminum / high-impact plastic housing |
| Flow Velocity Range |
±0.03 m/s to ±5.0 m/s |
| Energy Units |
kWh, BTU, MJ, GJ (selectable totalizers) |
| Applicable Pipe Materials |
Copper, stainless steel, carbon steel, PPR, PVC, PEX |
| Applicable Fluids |
Water, chilled water, hot water, glycol/water mixtures |
| Outputs & Interfaces |
• RS485 (Modbus RTU) • 4-20mA Analog / OCT Pulse Output |
| Fluid Temperature Range |
0°C to 90°C (32°F to 194°F) |
FAQ
Q1: What is the main difference between the F600 and the FHM500?
While both meters are built for small pipes, the FHM500 Flow Watch is a quick-check tool focused strictly on volumetric liquid flow. The F600 is specifically designed as a thermal energy/BTU meter equipped with PT1000 temperature inputs to calculate heat and cooling energy consumption in HVAC loops.
Q2: Does the F600 measure energy in thermal heating and cooling applications?
Yes. By measuring both the fluid flow rate and the temperature difference between the supply and return lines via PT1000 sensors, the F600 accurately computes real-time energy transfer in units such as kWh or BTU.
Q3: What pipe sizes can the F600 accommodate?
The F600 is optimized for small-pipe commercial applications ranging from DN15 to DN40 (inner diameters of 12mm to 40mm). For larger pipe diameters (DN50 and above), our wall-mounted FMU833 or FHS300 models are recommended.
Q4: Can the F600 connect to a Building Automation System (BAS)?
Yes. The F600 includes standard RS485 Modbus RTU communications, allowing facility managers to integrate live flow rates, temperatures, and totalized BTU data directly into their BMS or energy monitoring network.
