Ultrasonic Flow Meter
for small pipes
Product Description
✓ IP65 Transmitter · ✓ CE Compliant · ✓ Non-Invasive
Pipe Size: DN15 – DN65 (½″ – 2½″)
Medium Temp: -10°C to +65°C (standard) / +115°C (high-temp)
Pipe Material: Metal & Plastic (SS, Carbon Steel, PVC, Copper)
Output: 4–20 mA | RS485 Modbus
Installation: Clamp-On — No Pipe Cutting
Lead Time: 7 days · MOQ: 1 Unit
Engineer replies within 24 hours · Free technical consultation
Technical Specifications
Performance
| Parameter | Specification |
|---|---|
| Measurement Principle | Transit-time difference — uses ultrasonic sound waves to measure flow velocity |
| Accuracy | ±2% of measured value (±1% after calibration) — high precision for small pipe applications |
| Low Velocity Cut-Off | 0.1 m/s (factory default) |
| Pipe Size / Measuring Range | DN15–DN40 (½″–1½″) popular type DN50–DN65 (2″–2½″) popular type |
| Applicable Fluid | Water, oil, chemicals — single liquid medium without solid particles or impurities |
| Pipe Material | Metal (stainless steel, carbon steel, copper) and resin (PVC, PP, PVDF) — a wide range of pipe diameter and material compatibility |
Transmitter
| Parameter | Specification |
|---|---|
| Display | 256×128 LCD, multi-information display |
| Analog Output | 4-20mA |
| Communication | RS485 Modbus |
| Power Supply | DC 10–24V |
| Protection Rating | IP65 |
| Data Backup | EEPROM (10+ years retention, 1 million+ read/write cycles) |
Clamp-On Transducers
| Parameter | Specification |
|---|---|
| Operating Temperature |
Standard: -10°C to +65°C High-Temp type: -10°C to +115°C |
| Cable Length | Standard: 2 m (6.6 ft) |
| Installation | External clamp-on — no contact with fluid, no pressure loss |
Optional: Energy Meter Function
This ultrasonic flow meter for small pipes can also function as a BTU energy meter by adding the RTD module and PT1000 clamp-on temperature sensors (standard cable length: 9 m). This enables on-site measurement of heat and cold consumption in:
- HVAC chilled water loops and heating pipelines
- Air-conditioning and refrigeration systems
- Small-diameter district energy sub-metering
Why Use a Dedicated Small Pipe Ultrasonic Flow Meter?
Standard clamp-on ultrasonic flow meters and most ultrasonic flowmeters are designed for DN25 and above. When you clamp standard transducers onto a ½-inch or 1-inch pipe, the sound waves travel too short a path, the pipe wall curvature is too tight, and measurement accuracy drops — flow rates become unreliable.
This dedicated ultrasonic flow meter for small pipes adopts a new external clamp design specifically engineered for small diameter pipes from DN15 to DN65. It measures the flow rate of liquid flows without touching the measurement medium — avoiding pressure loss or media contamination:
- Purpose-built for small bore pipes — The external clamp-on transducers are designed for pipes from ½ inch to 2½ inches. One set is universal for all pipe sizes in the measuring range, so there is no need to buy separate ultrasonic meters for different sizes.
- True non-invasive water flow meter — This is a true non-invasive flow meter: clamp on the outside, no cutting, no welding, no contamination risk. Critical where water flowing through the pipe must remain pure — chemical dosing, lab applications, and clean water systems.
- Wide range of pipe material compatibility — Compatible with metal pipes (stainless steel, carbon steel, copper) and resin pipes (PVC, PP, PVDF). Suitable for many kinds of pipe material without needing separate sensors.
- Zero pressure drop & long-term cost effectiveness — Unlike inline mechanical flow meters that restrict flow velocity in small pipes, this clamp-on ultrasonic flow meter adds nothing inside the pipe. No moving parts, no obstruction, no pressure loss — and minimal long-term maintenance cost. Read more: Can Clamp-On Ultrasonic Flow Meters Work Effectively on Small Pipes?
Typical Applications
🔧 HVAC Chilled Water & Cooling Water Monitoring
The Problem: In HVAC systems, chilled water flow and cooling water often run through DN20–DN50 branch pipes. Mechanical flow meters cause differential pressure loss and need regular maintenance. Standard ultrasonic clamp-on meters don’t fit these small lines accurately.
Why This Meter Works Best: This HVAC flow meter clamps directly onto small chilled water pipes with zero pressure loss. Add the optional RTD module to measure thermal energy (BTU) — turning it into a dedicated chilled water flow meter or cooling water flow meter for building energy management. No air flow interference, no gas flow concerns — designed specifically for liquid measurement.
Best For: Building commissioning, chiller plant sub-metering, district cooling branch circuits.
🔧 Chemical Dosing & Laboratory Flow Measurement
The Problem: Chemical dosing lines and lab supply pipes are typically DN15–DN25. You need accurate flow rate measurement without contaminating the fluid or introducing dead legs that harbor bacteria. Traditional meter technologies — such as turbine or magnetic flow meters that rely on a magnetic field — require direct fluid contact and conductive liquids.
Why This Meter Works Best: As a non-invasive flow meter, this ultrasonic clamp-on design means zero contact with the chemical or DI water. No seals to corrode, no wetted parts to maintain. The transit time flow meter measurement works reliably on both metal and PVC dosing lines — even on non-conductive liquids where mag meters cannot function.
Best For: Water treatment chemical injection, pharmaceutical DI water monitoring, laboratory process verification. An ideal lab flow meter for small pipe applications.
🔧 Building Water Sub-Metering
The Problem: Property managers need to meter water consumption for individual units or zones, but existing ½-inch and ¾-inch supply lines (flow meter for 1/2 inch pipe, flow meter for 1 inch pipe) can’t accommodate bulky inline ultrasonic flow meters without costly pipe modifications.
Why This Meter Works Best: Clamp on in minutes — no plumbing shutdown, no pipe cutting. The compact transducers fit DN15–DN25 supply lines. RS485 Modbus output integrates directly with building management systems for automated reading. Long-term maintenance is minimal — no moving parts to replace.
Need help selecting the right configuration? Contact our engineering team.✅ Ideal Applications
| Application | Why This Meter Excels |
|---|---|
| HVAC chilled water & cooling water loops | Zero pressure drop on DN20–DN50 branch circuits; optional BTU energy metering |
| Chemical dosing & DI water monitoring | Non-invasive — no contamination risk on DN15–DN25 dosing lines |
| Building water sub-metering | Quick clamp-on install on ½″–1″ supply pipes; Modbus for BMS integration |
| Process cooling circuits | Monitors flow rate through small-bore cooling lines with no flow restriction |
| Laboratory & R&D flow verification | Portable verification of flow rates on test rigs and pilot systems |
❌ Not Recommended For
| Application | Why | Better Alternative |
|---|---|---|
| Slurries or high-solids fluids | Suspended particles scatter ultrasonic signal | Electromagnetic flow meter |
| Gas or steam | Transit-time requires liquid medium | Vortex flow meter (steam) / Thermal mass meter (gas) |
| Pipes larger than DN65 (2½″) | Use standard-size transducers for better signal | Wall-mount clamp-on flow meter (DN25–DN1200) |
| Non-full pipe conditions | Requires fully filled pipe for transit-time | Open channel flow meter |
| Fluids with heavy bubbles or impurities | Bubbles scatter sound waves and degrade signal | Doppler ultrasonic flow meter or electromagnetic meter |
How It Works: Transit-Time Ultrasonic Flow Measurement
This small pipe ultrasonic flow meter uses transit-time difference technology to measure liquid flow velocity — without any contact with the fluid inside the pipe. Unlike the Doppler effect method (which requires particles or bubbles in the fluid), transit-time measurement works on clean liquids by sending ultrasonic sound waves through the pipe wall and the flowing liquid.
Two compact clamp-on transducers are mounted on the outside of the pipe:
- Transducer A sends an ultrasonic pulse with the flow direction
- Transducer B sends a pulse against the flow direction
When liquid flows through the pipe, the downstream pulse arrives faster than the upstream pulse. The meter measures that transit time difference and calculates flow velocity and flow rate. This is the same proven principle used in all transit time ultrasonic flow meters — but with transducers specifically designed for small pipe diameter applications.
No moving parts. No contact with the liquid. No differential pressure drop. No contamination risk.
Because the transducers clamp externally, pipe material doesn’t matter — stainless steel, carbon steel, copper, PVC, PP, or PVDF all work. One meter from our ultrasonic flow meter product line covers your entire small-pipe range from DN15 to DN65.
Can We Meet Your Requirements?
| Requirement | Capability | Status |
|---|---|---|
| Pipe Size DN15–DN40 | Standard configuration | ✅ In stock |
| Pipe Size DN50–DN65 | Standard configuration | ✅ In stock |
| Pipe Size > DN65 | Use our standard clamp-on meter | ⚠️ See clamp-on flow meter |
| Clean water / Cooling water | Standard application | ✅ Standard |
| Chemicals / DI water | Non-invasive — no fluid contact | ✅ Available |
| Oil / Petroleum liquids | Compatible with transit-time method | ✅ Available |
| Accuracy ±2% (±1% calibrated) | Standard specification | ✅ Standard |
| Energy metering (BTU) | Optional RTD module + PT1000 | ✅ Available |
| SCADA/BMS integration | 4-20mA + RS485 Modbus | ✅ Standard |
| High-temperature (up to 115°C) | High-temp transducer option | ✅ Available |
| Slurries / High-solids fluids | Not suitable for transit-time | ❌ Not recommended |
| Gas / Steam | Liquid measurement only | ❌ Not suitable |
Our Capabilities & Boundaries
WHAT WE DO:
- Non-invasive ultrasonic flow measurement for liquids in small diameter pipes (DN15–DN65) — a dedicated product in our ultrasonic flow meter product line
- Universal compatibility across a wide range of metal and plastic pipe materials with one set of clamp-on transducers
- Optional energy meter function with PT1000 sensors for HVAC heating/cooling BTU measurement
- 4-20mA and RS485 Modbus output for BMS and SCADA integration
- Measures flow rate and flow velocity of water flowing through small pipes without contact — ideal as a water flow meter for small pipes
WHAT WE DON’T DO:
- Pipes larger than DN65 → Use our wall-mount clamp-on ultrasonic flow meter (DN25–DN1200)
- Gas flow or steam flow → Use our vortex flow meter for steam, or thermal mass flow meter for gas
- Slurries or high-solids fluids → Use our electromagnetic flow meter (magnetic flow meters work well with conductive slurries)
- Custody transfer at ±0.2% accuracy → This requires Coriolis technology
Ordering Information
| Item | Details |
|---|---|
| Standard Package | Transmitter + 1 pair clamp-on transducers (DN15–DN65) + mounting accessories |
| Optional Add-On | RTD module + PT1000 temperature sensors (energy meter function, 9 m cable) |
| MOQ | 1 unit |
| Standard Lead Time | 7 days |
| Rush Order | Available — contact sales for expedited delivery |
| Payment Terms | T/T |
| Warranty | 12 months from shipment date |
| Packaging | Individual carton with foam protection, ISPM 15 compliant for export |
| Included Documentation | Factory calibration certificate, operation manual |
Frequently Asked Questions
What is the smallest pipe size this ultrasonic flow meter can measure?
This meter measures pipes as small as DN15 (½ inch). The clamp-on transducers are specifically designed for small bore pipes, delivering reliable transit-time measurement on pipe diameters from DN15 to DN65. For pipes smaller than DN15, please contact our engineering team to discuss micro-flow alternatives.
How does this compare to an inline flow meter for small pipes?
Inline flow meters (turbine, magnetic, positive displacement) require cutting into the pipe and direct contact with the fluid. On small pipes, they also cause significant pressure drop. This clamp-on ultrasonic flow meter installs externally — no pipe cutting, no pressure loss, no contamination risk. It’s ideal when you cannot shut down the system for installation, or when the fluid must remain uncontaminated (chemicals, DI water, food-grade liquids). For a detailed comparison, read: Inline vs Clamp-On Ultrasonic Flow Meters.
Can I use this as a chilled water or cooling water flow meter?
Yes. This meter is well-suited as a chilled water flow meter or cooling water flow meter for HVAC branch circuits on small pipes. By adding the optional RTD module and PT1000 sensors, it also functions as a BTU energy meter — measuring both flow and thermal energy in heating/cooling loops. Learn more: How Do Clamp-On Ultrasonic Flow Meters Measure Energy?
What pipe materials are compatible?
The clamp-on transducers work on both metal pipes (stainless steel, carbon steel, copper) and plastic pipes (PVC, PP, PVDF). One set of transducers covers all compatible materials — you don’t need separate sensors for metal vs. plastic. The key requirement is that the pipe wall must be solid and compact (no lined or concrete pipes). Read more: Pipe Requirements for Ultrasonic Flow Meter Installation.
Is this meter accurate enough for flow measurement on small pipes?
The standard accuracy is ±2% of measured value, which improves to ±1% after site calibration. For flow verification, HVAC monitoring, process control, and sub-metering applications, this level of accuracy is well within operational requirements. For custody transfer applications requiring ±0.5% or better, consider an electromagnetic flow meter or Coriolis meter. See: How Accurate Are Ultrasonic Flow Meters?
How do I install clamp-on transducers on a small pipe?
Installation takes minutes: (1) Enter pipe parameters (diameter, wall thickness, material) into the transmitter. (2) Apply coupling gel to the transducer faces. (3) Clamp the compact transducers onto the pipe at the spacing calculated by the meter. No special tools, no pipe cutting, no process shutdown. The meter calculates optimal spacing automatically. For detailed instructions, see: How to Install a Clamp-On Ultrasonic Flow Meter.
Get Your Custom Quote in 24 Hours
At Soaring Instrument, we manufacture a full product line of ultrasonic flow meters — from standard clamp-on meters to this dedicated small pipe model — all in-house. Whether you need a flow meter for 2 inch pipe, a flow meter for 1/2 inch pipe, or anything in between, we’ll recommend the right configuration for your pipe size and medium.
Tell us your pipe size, pipe material, medium type, and what you need to measure. Want to compare ultrasonic flow meter price options or understand the ultrasonic flow meter vs magnetic flow meter trade-offs for your application? Our engineering team responds with a technical recommendation and pricing within 24 hours.
- 📧 [email protected]
- 📞 0086-13585991410
- 🌐 Contact Us Online
What Happens After You Submit?
- Step 1: Engineer reviews your requirements and replies within 24 hours
- Step 2: Free 30-minute technical consultation (no obligation)
- Step 3: Detailed proposal with pricing in 3 business days
Related Resources
- Can Clamp-On Ultrasonic Flow Meters Work Effectively on Small Pipes?
- The Complete Guide of Ultrasonic Flow Meter
- How Does a Transit-Time Ultrasonic Flow Meter Work?
- How to Install a Clamp-On Ultrasonic Flow Meter: Step-by-Step Guide
- How Accurate Are Ultrasonic Flow Meters?
- Inline vs Clamp-On Ultrasonic Flow Meters: Key Differences
- Pipe Requirements for Ultrasonic Flow Meter Installation
- What Fluids Can Ultrasonic Flow Meters Measure?
- How Do Clamp-On Ultrasonic Flow Meters Measure Energy?
- Clamp-On Ultrasonic Flow Meter Troubleshooting Checklist
Technical Specifications
Performance
| Parameter | Specification |
|---|---|
| Measurement Principle | Transit-time difference — uses ultrasonic sound waves to measure flow velocity |
| Accuracy | ±2% of measured value (±1% after calibration) — high precision for small pipe applications |
| Low Velocity Cut-Off | 0.1 m/s (factory default) |
| Pipe Size / Measuring Range | DN15–DN40 (½″–1½″) popular type DN50–DN65 (2″–2½″) popular type |
| Applicable Fluid | Water, oil, chemicals — single liquid medium without solid particles or impurities |
| Pipe Material | Metal (stainless steel, carbon steel, copper) and resin (PVC, PP, PVDF) — a wide range of pipe diameter and material compatibility |
Transmitter
| Parameter | Specification |
|---|---|
| Display | 256×128 LCD, multi-information display |
| Analog Output | 4-20mA |
| Communication | RS485 Modbus |
| Power Supply | DC 10–24V |
| Protection Rating | IP65 |
| Data Backup | EEPROM (10+ years retention, 1 million+ read/write cycles) |
Clamp-On Transducers
| Parameter | Specification |
|---|---|
| Operating Temperature |
Standard: -10°C to +65°C High-Temp type: -10°C to +115°C |
| Cable Length | Standard: 2 m (6.6 ft) |
| Installation | External clamp-on — no contact with fluid, no pressure loss |
Optional: Energy Meter Function
This ultrasonic flow meter for small pipes can also function as a BTU energy meter by adding the RTD module and PT1000 clamp-on temperature sensors (standard cable length: 9 m). This enables on-site measurement of heat and cold consumption in:
- HVAC chilled water loops and heating pipelines
- Air-conditioning and refrigeration systems
- Small-diameter district energy sub-metering
Why Use a Dedicated Small Pipe Ultrasonic Flow Meter?
Standard clamp-on ultrasonic flow meters and most ultrasonic flowmeters are designed for DN25 and above. When you clamp standard transducers onto a ½-inch or 1-inch pipe, the sound waves travel too short a path, the pipe wall curvature is too tight, and measurement accuracy drops — flow rates become unreliable.
This dedicated ultrasonic flow meter for small pipes adopts a new external clamp design specifically engineered for small diameter pipes from DN15 to DN65. It measures the flow rate of liquid flows without touching the measurement medium — avoiding pressure loss or media contamination:
- Purpose-built for small bore pipes — The external clamp-on transducers are designed for pipes from ½ inch to 2½ inches. One set is universal for all pipe sizes in the measuring range, so there is no need to buy separate ultrasonic meters for different sizes.
- True non-invasive water flow meter — This is a true non-invasive flow meter: clamp on the outside, no cutting, no welding, no contamination risk. Critical where water flowing through the pipe must remain pure — chemical dosing, lab applications, and clean water systems.
- Wide range of pipe material compatibility — Compatible with metal pipes (stainless steel, carbon steel, copper) and resin pipes (PVC, PP, PVDF). Suitable for many kinds of pipe material without needing separate sensors.
- Zero pressure drop & long-term cost effectiveness — Unlike inline mechanical flow meters that restrict flow velocity in small pipes, this clamp-on ultrasonic flow meter adds nothing inside the pipe. No moving parts, no obstruction, no pressure loss — and minimal long-term maintenance cost. Read more: Can Clamp-On Ultrasonic Flow Meters Work Effectively on Small Pipes?
Typical Applications
🔧 HVAC Chilled Water & Cooling Water Monitoring
The Problem: In HVAC systems, chilled water flow and cooling water often run through DN20–DN50 branch pipes. Mechanical flow meters cause differential pressure loss and need regular maintenance. Standard ultrasonic clamp-on meters don’t fit these small lines accurately.
Why This Meter Works Best: This HVAC flow meter clamps directly onto small chilled water pipes with zero pressure loss. Add the optional RTD module to measure thermal energy (BTU) — turning it into a dedicated chilled water flow meter or cooling water flow meter for building energy management. No air flow interference, no gas flow concerns — designed specifically for liquid measurement.
Best For: Building commissioning, chiller plant sub-metering, district cooling branch circuits.
🔧 Chemical Dosing & Laboratory Flow Measurement
The Problem: Chemical dosing lines and lab supply pipes are typically DN15–DN25. You need accurate flow rate measurement without contaminating the fluid or introducing dead legs that harbor bacteria. Traditional meter technologies — such as turbine or magnetic flow meters that rely on a magnetic field — require direct fluid contact and conductive liquids.
Why This Meter Works Best: As a non-invasive flow meter, this ultrasonic clamp-on design means zero contact with the chemical or DI water. No seals to corrode, no wetted parts to maintain. The transit time flow meter measurement works reliably on both metal and PVC dosing lines — even on non-conductive liquids where mag meters cannot function.
Best For: Water treatment chemical injection, pharmaceutical DI water monitoring, laboratory process verification. An ideal lab flow meter for small pipe applications.
🔧 Building Water Sub-Metering
The Problem: Property managers need to meter water consumption for individual units or zones, but existing ½-inch and ¾-inch supply lines (flow meter for 1/2 inch pipe, flow meter for 1 inch pipe) can’t accommodate bulky inline ultrasonic flow meters without costly pipe modifications.
Why This Meter Works Best: Clamp on in minutes — no plumbing shutdown, no pipe cutting. The compact transducers fit DN15–DN25 supply lines. RS485 Modbus output integrates directly with building management systems for automated reading. Long-term maintenance is minimal — no moving parts to replace.
Need help selecting the right configuration? Contact our engineering team.✅ Ideal Applications
| Application | Why This Meter Excels |
|---|---|
| HVAC chilled water & cooling water loops | Zero pressure drop on DN20–DN50 branch circuits; optional BTU energy metering |
| Chemical dosing & DI water monitoring | Non-invasive — no contamination risk on DN15–DN25 dosing lines |
| Building water sub-metering | Quick clamp-on install on ½″–1″ supply pipes; Modbus for BMS integration |
| Process cooling circuits | Monitors flow rate through small-bore cooling lines with no flow restriction |
| Laboratory & R&D flow verification | Portable verification of flow rates on test rigs and pilot systems |
❌ Not Recommended For
| Application | Why | Better Alternative |
|---|---|---|
| Slurries or high-solids fluids | Suspended particles scatter ultrasonic signal | Electromagnetic flow meter |
| Gas or steam | Transit-time requires liquid medium | Vortex flow meter (steam) / Thermal mass meter (gas) |
| Pipes larger than DN65 (2½″) | Use standard-size transducers for better signal | Wall-mount clamp-on flow meter (DN25–DN1200) |
| Non-full pipe conditions | Requires fully filled pipe for transit-time | Open channel flow meter |
| Fluids with heavy bubbles or impurities | Bubbles scatter sound waves and degrade signal | Doppler ultrasonic flow meter or electromagnetic meter |
How It Works: Transit-Time Ultrasonic Flow Measurement
This small pipe ultrasonic flow meter uses transit-time difference technology to measure liquid flow velocity — without any contact with the fluid inside the pipe. Unlike the Doppler effect method (which requires particles or bubbles in the fluid), transit-time measurement works on clean liquids by sending ultrasonic sound waves through the pipe wall and the flowing liquid.
Two compact clamp-on transducers are mounted on the outside of the pipe:
- Transducer A sends an ultrasonic pulse with the flow direction
- Transducer B sends a pulse against the flow direction
When liquid flows through the pipe, the downstream pulse arrives faster than the upstream pulse. The meter measures that transit time difference and calculates flow velocity and flow rate. This is the same proven principle used in all transit time ultrasonic flow meters — but with transducers specifically designed for small pipe diameter applications.
No moving parts. No contact with the liquid. No differential pressure drop. No contamination risk.
Because the transducers clamp externally, pipe material doesn’t matter — stainless steel, carbon steel, copper, PVC, PP, or PVDF all work. One meter from our ultrasonic flow meter product line covers your entire small-pipe range from DN15 to DN65.
Can We Meet Your Requirements?
| Requirement | Capability | Status |
|---|---|---|
| Pipe Size DN15–DN40 | Standard configuration | ✅ In stock |
| Pipe Size DN50–DN65 | Standard configuration | ✅ In stock |
| Pipe Size > DN65 | Use our standard clamp-on meter | ⚠️ See clamp-on flow meter |
| Clean water / Cooling water | Standard application | ✅ Standard |
| Chemicals / DI water | Non-invasive — no fluid contact | ✅ Available |
| Oil / Petroleum liquids | Compatible with transit-time method | ✅ Available |
| Accuracy ±2% (±1% calibrated) | Standard specification | ✅ Standard |
| Energy metering (BTU) | Optional RTD module + PT1000 | ✅ Available |
| SCADA/BMS integration | 4-20mA + RS485 Modbus | ✅ Standard |
| High-temperature (up to 115°C) | High-temp transducer option | ✅ Available |
| Slurries / High-solids fluids | Not suitable for transit-time | ❌ Not recommended |
| Gas / Steam | Liquid measurement only | ❌ Not suitable |
Our Capabilities & Boundaries
WHAT WE DO:
- Non-invasive ultrasonic flow measurement for liquids in small diameter pipes (DN15–DN65) — a dedicated product in our ultrasonic flow meter product line
- Universal compatibility across a wide range of metal and plastic pipe materials with one set of clamp-on transducers
- Optional energy meter function with PT1000 sensors for HVAC heating/cooling BTU measurement
- 4-20mA and RS485 Modbus output for BMS and SCADA integration
- Measures flow rate and flow velocity of water flowing through small pipes without contact — ideal as a water flow meter for small pipes
WHAT WE DON’T DO:
- Pipes larger than DN65 → Use our wall-mount clamp-on ultrasonic flow meter (DN25–DN1200)
- Gas flow or steam flow → Use our vortex flow meter for steam, or thermal mass flow meter for gas
- Slurries or high-solids fluids → Use our electromagnetic flow meter (magnetic flow meters work well with conductive slurries)
- Custody transfer at ±0.2% accuracy → This requires Coriolis technology
Ordering Information
| Item | Details |
|---|---|
| Standard Package | Transmitter + 1 pair clamp-on transducers (DN15–DN65) + mounting accessories |
| Optional Add-On | RTD module + PT1000 temperature sensors (energy meter function, 9 m cable) |
| MOQ | 1 unit |
| Standard Lead Time | 7 days |
| Rush Order | Available — contact sales for expedited delivery |
| Payment Terms | T/T |
| Warranty | 12 months from shipment date |
| Packaging | Individual carton with foam protection, ISPM 15 compliant for export |
| Included Documentation | Factory calibration certificate, operation manual |
Frequently Asked Questions
What is the smallest pipe size this ultrasonic flow meter can measure?
This meter measures pipes as small as DN15 (½ inch). The clamp-on transducers are specifically designed for small bore pipes, delivering reliable transit-time measurement on pipe diameters from DN15 to DN65. For pipes smaller than DN15, please contact our engineering team to discuss micro-flow alternatives.
How does this compare to an inline flow meter for small pipes?
Inline flow meters (turbine, magnetic, positive displacement) require cutting into the pipe and direct contact with the fluid. On small pipes, they also cause significant pressure drop. This clamp-on ultrasonic flow meter installs externally — no pipe cutting, no pressure loss, no contamination risk. It’s ideal when you cannot shut down the system for installation, or when the fluid must remain uncontaminated (chemicals, DI water, food-grade liquids). For a detailed comparison, read: Inline vs Clamp-On Ultrasonic Flow Meters.
Can I use this as a chilled water or cooling water flow meter?
Yes. This meter is well-suited as a chilled water flow meter or cooling water flow meter for HVAC branch circuits on small pipes. By adding the optional RTD module and PT1000 sensors, it also functions as a BTU energy meter — measuring both flow and thermal energy in heating/cooling loops. Learn more: How Do Clamp-On Ultrasonic Flow Meters Measure Energy?
What pipe materials are compatible?
The clamp-on transducers work on both metal pipes (stainless steel, carbon steel, copper) and plastic pipes (PVC, PP, PVDF). One set of transducers covers all compatible materials — you don’t need separate sensors for metal vs. plastic. The key requirement is that the pipe wall must be solid and compact (no lined or concrete pipes). Read more: Pipe Requirements for Ultrasonic Flow Meter Installation.
Is this meter accurate enough for flow measurement on small pipes?
The standard accuracy is ±2% of measured value, which improves to ±1% after site calibration. For flow verification, HVAC monitoring, process control, and sub-metering applications, this level of accuracy is well within operational requirements. For custody transfer applications requiring ±0.5% or better, consider an electromagnetic flow meter or Coriolis meter. See: How Accurate Are Ultrasonic Flow Meters?
How do I install clamp-on transducers on a small pipe?
Installation takes minutes: (1) Enter pipe parameters (diameter, wall thickness, material) into the transmitter. (2) Apply coupling gel to the transducer faces. (3) Clamp the compact transducers onto the pipe at the spacing calculated by the meter. No special tools, no pipe cutting, no process shutdown. The meter calculates optimal spacing automatically. For detailed instructions, see: How to Install a Clamp-On Ultrasonic Flow Meter.
Get Your Custom Quote in 24 Hours
At Soaring Instrument, we manufacture a full product line of ultrasonic flow meters — from standard clamp-on meters to this dedicated small pipe model — all in-house. Whether you need a flow meter for 2 inch pipe, a flow meter for 1/2 inch pipe, or anything in between, we’ll recommend the right configuration for your pipe size and medium.
Tell us your pipe size, pipe material, medium type, and what you need to measure. Want to compare ultrasonic flow meter price options or understand the ultrasonic flow meter vs magnetic flow meter trade-offs for your application? Our engineering team responds with a technical recommendation and pricing within 24 hours.
- 📧 [email protected]
- 📞 0086-13585991410
- 🌐 Contact Us Online
What Happens After You Submit?
- Step 1: Engineer reviews your requirements and replies within 24 hours
- Step 2: Free 30-minute technical consultation (no obligation)
- Step 3: Detailed proposal with pricing in 3 business days
Related Resources
- Can Clamp-On Ultrasonic Flow Meters Work Effectively on Small Pipes?
- The Complete Guide of Ultrasonic Flow Meter
- How Does a Transit-Time Ultrasonic Flow Meter Work?
- How to Install a Clamp-On Ultrasonic Flow Meter: Step-by-Step Guide
- How Accurate Are Ultrasonic Flow Meters?
- Inline vs Clamp-On Ultrasonic Flow Meters: Key Differences
- Pipe Requirements for Ultrasonic Flow Meter Installation
- What Fluids Can Ultrasonic Flow Meters Measure?
- How Do Clamp-On Ultrasonic Flow Meters Measure Energy?
- Clamp-On Ultrasonic Flow Meter Troubleshooting Checklist