FBTU2X Wall Mounted Ultrasonic Flow Meter / BTU Meter
Specifications
Details
FBTU2X Wall Mounted Ultrasonic Flow Meter
3Wire FBTU2X is a cost-effective wall mounted ultrasonic flow meter for long-term flow measurement and optional BTU / heat energy measurement. It is suitable for water, cooling water, chilled water, reclaimed water, potable water, chemicals, sewage, river water, plant effluent, ultra-pure liquids and other compatible liquids.
The FBTU2X supports clamp-on, insertion and pipe-section measurement arrangements. With optional Pt100 temperature transducers, it can measure supply and return pipe temperature to calculate heat / energy usage for chilled water, hot water, HVAC and process utility applications.
Product Overview
FBTU2X is designed for applications that require reliable long-term flow monitoring without unnecessary pressure loss or excessive mechanical modification. For many applications, clamp-on transducers allow measurement to be done from outside the pipe, avoiding pipe cutting and process interruption.
Where higher stability or permanent installation is required, insertion and pipe-section transducers are available. The product can also be configured for heat / energy measurement by using suitable temperature transducers on the supply and return pipes.
Typical Heat / BTU Measurement Flow
FBTU2X measures flow rate in the pipe and uses supply / return temperature inputs from Pt100 temperature transducers to calculate heat or energy transfer.
Key Features
Clamp-On Measurement
No need to cut the pipe, no process shutdown and no pressure loss for suitable clamp-on applications.
Optional BTU / Heat Measurement
Connect Pt100 temperature transducers to measure heat / energy using supply and return pipe temperature.
Wide Pipe Range
Supports small, medium and large pipe applications from DN15 to DN6000 depending on selected transducer.
Multiple Transducer Types
Clamp-on, high-temperature clamp-on, insertion and pipe-section transducers are available.
Industrial Protection
Converter protection is IP67 and transducer protection is IP68 for demanding installation environments.
RS485 Modbus Support
Isolated RS485 serial interface supports Modbus communication and computer-based configuration / upgrade.
Analogue and Pulse Outputs
Includes 4–20mA output, OCT pulse output and relay output for control and monitoring integration.
Optional SD Card Memory
Supports long-term and large data storage for data analysis, reports and production flow curves.
Low Power Consumption
Converter power consumption is approximately 1.5W, suitable for continuous monitoring applications.
Measurement Options
The datasheet measuring diagram shows three installation methods: clamp-on, insertion and pipe-section. Each method supports both flow measurement and heat measurement, depending on transducer and temperature sensor selection.
| Measurement Method | Description | Best Use |
|---|---|---|
| Clamp-On | Transducers are mounted outside the pipe. No pipe cutting and no pressure loss. | Retrofit flow / BTU measurement, chilled water systems, temporary testing and non-invasive monitoring. |
| Insertion | Insertion transducers are installed into the pipe. Stable and reliable for long-term operation. | Permanent flow monitoring where higher installation stability is required. |
| Pipe-Section | Pipe-type flow body is installed by cutting the pipe. Offers high accuracy and stability. | New installations or critical permanent measurement points requiring dedicated flow section. |
| Heat / BTU Measurement | Flow measurement combined with Pt100 temperature transducers on supply and return pipes. | Chilled water, hot water, HVAC, district cooling, boiler and process utility energy measurement. |
Supported Liquid Applications
FBTU2X can measure many liquids that can transmit ultrasonic sound waves. This includes clean liquids and selected process liquids, subject to site condition and transducer selection.
Water and Cooling Water
Potable water, chilled water, hot water, city water, cooling water and reclaimed water.
Wastewater and Effluent
Raw sewage, plant effluent and selected wastewater applications with suitable conditions.
Chemicals and Process Liquids
Chemicals, alcohol, beverage, sea water, oil-based liquids and selected process fluids.
Optional Flow Transducers
| Type | Specification | Model | Measurement Range | Temperature | Dimension |
|---|---|---|---|---|---|
| Clamp-On | Small Size | TS-2 | DN25–DN100 | -30°C to 90°C | 45 × 25 × 32mm |
| Clamp-On | Medium Size | TM-1 | DN50–DN700 | -30°C to 90°C | 64 × 39 × 44mm |
| Clamp-On | Large Size | TL-1 | DN300–DN6000 | -30°C to 90°C | 97 × 54 × 53mm |
| High-Temperature Clamp-On | Small Size | TS-2-HT | DN25–DN100 | -30°C to 160°C | 45 × 25 × 32mm |
| High-Temperature Clamp-On | Medium Size | TM-1-HT | DN50–DN700 | -30°C to 160°C | 64 × 39 × 44mm |
| High-Temperature Clamp-On | Large Size | TL-1-HT | DN300–DN6000 | -30°C to 160°C | 97 × 54 × 53mm |
| Insertion | Standard | TC-1 | DN80–DN6000 | -30°C to 160°C | 190 × 80 × 55mm |
| Insertion | Lengthen | TC-2 | DN80–DN6000 | -30°C to 160°C | 335 × 80 × 55mm |
| Pipe | π Type | G1 | DN15–DN32 | -30°C to 160°C | SUS304 thread connection |
| Pipe | Standard | G2 | DN40–DN1000 | -30°C to 160°C | Carbon steel thread connection; refer to detailed pipe dimensions |
Optional Temperature Transducers for Heat / Energy Measurement
| Specification | Model | Measurement Range | Temperature | Need to Cut Water? | Accuracy |
|---|---|---|---|---|---|
| Clamp-on temperature transducer Pt100 | CT-1 | > DN50 | -40°C to 160°C | No | 100°C ± 0.8°C |
| Insertion temperature transducer Pt100 | TCT-1 | > DN50 | -40°C to 160°C | Yes | 100°C ± 0.8°C |
| Insertion Pt100 installation with pressure | PCT-1 | > DN50 | -40°C to 160°C | No | 100°C ± 0.8°C |
| Insertion Pt100 for small pipe diameter | SCT-1 | < DN50 | -40°C to 160°C | Yes | 100°C ± 0.8°C |
Technical Specifications
| Category | Performance / Parameter |
|---|---|
| Principle | Transit-time ultrasonic flow meter |
| Accuracy | ±1% |
| Display | 2 × 20 character LCD with backlight; supports Chinese, English, Italian and Turkish language options |
| Signal Output | 1 × 4–20mA output, electric resistance 0–1kΩ, accuracy 0.1% |
| Pulse Output | 1 × OCT pulse output; pulse width approximately 1000ms, default 200ms |
| Relay Output | 1 × relay output |
| Signal Input | 3 × 4–20mA input, accuracy 0.1%; acquisition signals such as temperature, pressure and liquid level |
| Temperature Input | Connect Pt100 temperature transducer for heat / energy measurement |
| Data Interface | Isolated RS485 serial interface; supports Modbus and computer-based software upgrade |
| Special Cable | Twisted-pair cable, generally under 50m; using RS485 selection, transmission distance can exceed 1000m |
| Pipe Material | Steel, stainless steel, cast iron, copper, cement pipe, PVC, aluminium, glass steel product; pipe liner is allowed |
| Pipe Diameter | 25–6000mm, depending on selected transducer |
| Straight Pipe Requirement | Transducer installation should satisfy upstream 10D, downstream 5D and 30D from the pump |
| Measuring Medium | Liquids that can transmit sound waves such as water, sewage with small particle content, oil, chemical liquids, beverage, ultra-pure liquids and plant effluent |
| Medium Temperature | -30°C to 160°C depending on transducer selection |
| Turbidity | No more than 10,000ppm and fewer bubbles |
| Flow Rate | 0 to ±7m/s |
| Working Temperature | Converter: -20°C to 60°C; flow transducer: -30°C to 160°C |
| Working Humidity | Converter: 85% RH; flow transducer can measure under water when sealed, water depth ≤ 2m |
| Power Supply | DC 8–36V or AC 85–264V optional |
| Power Consumption | 1.5W |
| Converter Dimension | 132 × 150 × 85mm |
Optional SD Card Memory
Optional SD card memory provides convenient long-term and large-volume data storage. Stored data can be used for tabulation, statistical analysis, printing reports and producing flow curves using data analysis software.
- Useful for long-term flow monitoring.
- Supports data analysis and report generation.
- Helps build production flow curves and historical flow profiles.
- Useful for energy audit, chilled water analysis and process utility monitoring.
Why Use FBTU2X?
FBTU2X is suitable when flow needs to be measured without adding pressure loss, especially for retrofit applications. Clamp-on ultrasonic measurement is useful because the pipe does not need to be cut, making installation faster and reducing shutdown risk.
- No pressure loss for clamp-on measurement.
- No need to cut pipe for clamp-on installation.
- Suitable for long-term flow and BTU measurement.
- Supports a wide range of liquids and pipe materials.
- Supports RS485 Modbus integration into BMS, EMS, SCADA and IoTWatt 4.0.
- Suitable for chilled water, hot water, process water and utility metering.
- Optional SD card memory supports historical data storage and reporting.
Integration with IoTWatt 4.0
FBTU2X can be integrated into IoTWatt 4.0 for chilled water flow monitoring, BTU measurement, pump system analysis, chiller efficiency analysis, process utility monitoring and digital energy audit projects.
- Use RS485 Modbus to connect FBTU2X to IoTWatt 4.0 gateway or data acquisition system.
- Monitor chilled water flow rate, total flow, supply temperature and return temperature.
- Calculate BTU / heat energy for chilled water and hot water systems.
- Support chiller COP analysis, pump performance review and HVAC energy optimisation.
- Use data for EECA reporting, energy audit, M&V and energy saving verification.
Recommended Selection Checklist
- Confirm liquid type, temperature, turbidity and bubble condition.
- Confirm pipe material, pipe diameter, pipe wall thickness and lining condition.
- Confirm measurement method: clamp-on, insertion or pipe-section.
- Confirm whether BTU / heat energy measurement is required.
- Select suitable flow transducer and temperature transducer.
- Confirm straight pipe length: upstream 10D, downstream 5D and 30D from pump where possible.
- Confirm output requirement: 4–20mA, pulse, relay or RS485 Modbus.
- Confirm power supply: DC 8–36V or AC 85–264V option.
- Confirm whether SD card memory is required for local historical data storage.
FBTU2X Supply, Installation and IoTWatt 4.0 Integration
Saturn Pyro supports 3Wire FBTU2X ultrasonic flow meters for flow measurement, chilled water BTU metering, HVAC energy analysis, process utility monitoring, BMS / EMS integration and IoTWatt 4.0 digital energy audit projects in Malaysia.
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