Flow Meters for Liquids & Gases
Electromagnetic, ultrasonic, and thermal mass flow measurement from DN6 to DN1000. ±0.5% FS accuracy options. ATEX explosion-proof electromagnetic meters. Clamp-on non-contact and portable ultrasonic versions for retrofit and surveys.
Content reviewed 2026-08-05
AccuMeasure flow meters cover conductive liquids, non-conductive fluids, and process gases for water treatment, chemical processing, oil & gas, HVAC, and laboratory duty. Use electromagnetic (AM-EMF100) when the liquid is conductive and you need higher accuracy in a full-bore meter. Use clamp-on ultrasonic (AM-UF200) when you need non-invasive, non-contact installation without cutting the pipe—fixed or portable. Use thermal mass (AM-MF50) for precision gas mass flow in labs and semiconductor lines, not as a handheld pipe survey tool.
Electromagnetic Flow Meter
Mainstream flow meter for water treatment and chemical industry
Size
DN6-DN600
Accuracy
±0.5% FS
Liner
PTFE / PFA / Rubber
Protection
IP65 / IP68
Ultrasonic Flow Meter
Clamp-on, non-invasive flow measurement. No pipe cutting required.
Size
DN15-DN1000
Accuracy
±1% FS
Type
Portable / Fixed
Sensor
Clamp-on
Digital Mass Flow Meter
Precision gas mass flow measurement for labs and semiconductors
Range
0-500 slm
Accuracy
±1% FS
Response
<10ms
Material
316L SS
Compare Technologies
Decide by Installation & Area Classification
Match the measurement principle to fluid, pipe access, and hazardous-area requirements before you compare commercial terms.
Explosion-proof / ATEX flow meters
For hazardous-area oil & gas, chemical, or LPG/LNG service, start with the AM-EMF100 electromagnetic flow meter with ATEX Ex d IIC T6 available. Confirm fluid conductivity, pipe size, liner, grounding rings, and that the certificate names the exact model and protection marking before ordering. Clamp-on ultrasonic and thermal mass catalogs on this site are not the first path for Ex d process service unless a project-specific approval is confirmed in writing.
Non-contact, clamp-on, and non-invasive installation
If buyers search for non-contact or non-invasive flow meters, they usually mean clamp-on ultrasonic: sensors mount on the outside of the pipe, so there is no pipe cutting, no process shutdown, and no pressure drop. AM-UF200 supports DN15–DN1000 metal and plastic pipes and works with fluids that transmit sound, including many oils and low-conductivity waters that a magmeter cannot measure.
Portable survey vs fixed process metering
A portable ultrasonic version of AM-UF200 is intended for temporary surveys and multi-point checks. It is not the same as a portable thermal mass flow meter. AM-MF50 is a panel/process thermal mass meter for gas (0–500 slm), built for lab and semiconductor accuracy—not a handheld field mass meter for large process pipes. If your RFQ says “portable mass flow,” tell us pipe size, fluid phase (liquid or gas), and whether you need survey portability or fixed mass accuracy so we can refuse a mismatch instead of forcing a model.
Which Flow Meter Should I Buy?
Use this table to match the published AccuMeasure models to the fluid, installation, and approval requirements in your RFQ.
| Buyer need | Start here | Alternative | Guidance |
|---|---|---|---|
| Conductive liquid in a new full-bore line with higher accuracy | AM-EMF100 electromagnetic | AM-UF200 clamp-on ultrasonic | Start with electromagnetic for conductive water, wastewater, and process liquids when a flanged inline installation is acceptable. |
| Existing pipe cannot be cut or the liquid has low conductivity | AM-UF200 clamp-on ultrasonic | AM-EMF100 electromagnetic | Clamp-on ultrasonic avoids pipe cutting, shutdown, and pressure drop and works with many non-conductive fluids. |
| Hazardous area flow measurement | AM-EMF100 with ATEX Ex d IIC T6 | AM-MF50 or AM-UF200 only with written project-specific approval | Confirm the area classification and that the certificate names the exact model and protection marking before ordering. |
| Gas mass flow in lab, semiconductor, or process gas lines | AM-MF50 thermal mass meter | AM-UF200 portable ultrasonic for volumetric survey | AM-MF50 measures gas mass flow from 0 to 500 slm; it is not marketed as a handheld field mass meter for large process pipes. |
| Temporary survey or multi-point pipe checks | AM-UF200 portable ultrasonic | AM-MF50 thermal mass meter | Portable ultrasonic is the survey answer; fixed thermal mass is for precision gas mass measurement, not a portable pipe survey tool. |
Buyer Guides & Applications
Use these application and comparison guides to narrow the technology, installation, and specification before requesting a quotation.
Electromagnetic Flow Meter for Water Treatment
Define conductivity, pipe size, liner, flange, grounding, signal, and utility project requirements.
Read guideElectromagnetic vs Ultrasonic Flow Meter
Compare media limits, installation work, accuracy, maintenance, and lifecycle tradeoffs.
Read guideMagmeter vs Ultrasonic Selection Guide
Use practical pipe, process, and installation questions to shortlist the right flow technology.
Read guideNeed a different measurement duty? Browse all industrial measurement application guides before requesting a quotation.
Flow Meters Selection Guide
Use these checks before sending an RFQ. They help our engineers confirm the right model, output, material, and certification for your project.
Check conductivity first
Electromagnetic flow meters need conductive liquids (typically >5 µS/cm). Clamp-on ultrasonic is better for non-conductive fluids or when the pipe cannot be cut.
Define pipe and flow range
Share pipe size, material, liner, minimum and maximum flow rate, straight-run length, and whether the line can be stopped for installation.
Plan signal integration
Select 4-20mA, pulse, RS485 Modbus, HART, or EtherNet/IP based on the PLC, SCADA, or data logger used by the plant.
Specify hazardous-area approval
For oil & gas, chemical, and LPG/LNG service, order AM-EMF100 with ATEX Ex d IIC T6 and verify the certificate names the model before shipment.
Separate portable survey from mass accuracy
Use portable ultrasonic for temporary checks. Use AM-MF50 when you need gas mass flow accuracy in a fixed thermal mass installation—not as a drop-in for “portable mass” pipe surveys.
Flow Meters FAQ
Do you offer explosion-proof or ATEX flow meters?
Yes. The AM-EMF100 electromagnetic flow meter is available with ATEX Ex d IIC T6 for hazardous-area installations. Send the area classification, fluid, and pipe size so we can confirm the certified configuration.
What is a non-contact or non-invasive flow meter in your catalog?
Clamp-on ultrasonic (AM-UF200). Sensors mount externally, so there is no pipe cutting, no shutdown, and no pressure drop. It is the usual answer to non-contact / non-invasive flow searches on process pipes.
Is a portable flow meter available?
Yes—AM-UF200 is offered in portable and fixed versions for survey and permanent duty. Portable ultrasonic measures volumetric flow on prepared pipes; it is not a portable thermal mass meter.
Do you sell portable mass flow meters?
AM-MF50 is a thermal mass meter for gas (0–500 slm) in lab and semiconductor use. It is not marketed as a handheld portable mass meter for large process lines. If you need portable liquid or gas survey capability, start with AM-UF200 and describe the fluid so we can confirm fit.
Electromagnetic or ultrasonic—which should I choose?
Choose electromagnetic for conductive liquids and higher full-bore accuracy. Choose clamp-on ultrasonic when you cannot cut the pipe or the fluid is poorly conductive. See the comparison page for installation and maintenance tradeoffs.
Need help choosing the right flow meters?
Our engineers can recommend the best sensor for your application, medium, and budget. Describe your project and we'll aim to respond within one business day (UTC+8).