Clamp-on, inline and insertion flow measurement for water, chemicals, slurries and gases, with no moving parts in the wetted path where it matters.
Need a specific variant?
Ranges, threads, connectors and cable lengths can be modified at the factory from 50 pieces.
Request a quote Ask an engineerLead time5-14 days
CalibrationIncluded
Custom buildFrom 50 pcs
Flow is the variable where installation has the largest effect on accuracy. A turbine meter installed two diameters downstream of an elbow will read several percent low no matter how good the calibration was in the factory. DuoMy therefore supplies flow meters together with the straight-run requirements, the grounding kit and, for clamp-on ultrasonic units, a mounting rail that fixes the transducer spacing.
The range covers clamp-on ultrasonic meters for existing pipework where shutdown is not an option, turbine meters for clean low-viscosity liquids on small lines, vortex meters for steam and saturated gases, and electromagnetic meters for conductive liquids and slurries. Outputs are 4-20 mA, pulse, Modbus RTU and HART, and battery-powered versions are available for remote water networks.
Every meter is wet-calibrated on a gravimetric rig before shipment, and the calibration factor is printed on the housing and stored in the electronics, so replacing a meter does not require re-commissioning the loop.
Range Overview
Each variant exists because a different application needs it. The distinction is usually mechanical or environmental rather than a better accuracy figure.
Non-invasive measurement on DN15 to DN600 pipe with no process interruption. Suitable for water, glycol and most homogeneous liquids.
Small-line measurement for fuels, solvents and water with fast response and pulse or 4-20 mA output.
Steam, compressed air and saturated gas measurement with no moving parts and a wide turndown.
Full-bore magnetic meters for conductive liquids, slurries and wastewater, available with PTFE or rubber liners.
Local indication rotameters with optional alarm contacts for purge and dosing lines.
Catalogue
DM-FV40-VX-025
DM-FT80-TB-050
DM-FE150-CL-600
Technical Range
Figures below are the range across the family, not a single model. Specify the exact range, accuracy and connection on the quote request and we will confirm which variant meets it.
Request a specification check| Parameter | Typical |
|---|---|
| Line size | DN6 to DN1,200 |
| Accuracy | ±0.5% to ±2% of reading |
| Flow range | 0.1 to 12 m/s |
| Media temperature | -20 to +180 °C |
| Pressure rating | PN16 / PN40 / 150 lb |
| Output signal | 4-20 mA, pulse, Modbus RTU, HART |
| Supply voltage | 24 VDC or 220 VAC |
| Wetted material | 316L, PTFE, EPDM, PVC |
| Ingress protection | IP65 / IP67 / IP68 |
| Certifications | CE, RoHS, MID (option) |
Applications
Insertion and clamp-on meters on district mains, with battery versions for sites without power.
Bidirectional measurement for chilled and hot water, used for energy allocation and balancing.
Turbine and electromagnetic meters with pulse output for totaliser control on dosing skids.
Vortex meters with temperature and pressure compensation for utility billing and efficiency audits.
Selection Guide
Conductivity, solids content and temperature rule out technologies faster than any other criterion. Water at 20 °C is easy; slurry at 90 °C is not.
Most meters want ten diameters upstream and five downstream. If the plant cannot give it, choose a technology with a correction factor or accept a wider uncertainty.
Clamp-on ultrasonic avoids cutting the pipe, which usually decides the project. Inline meters are more accurate but need a shutdown window.
A meter sized for peak flow may not register night-time minimum flow. State both numbers when you request a quotation.
Pulse for totalising, 4-20 mA for control, Modbus for SCADA. Adding an output later often means a new electronics module.
FAQ
Laboratory accuracy is ±1% of reading. In the field, expect ±2% to ±3% unless the straight run, the transducer spacing and the pipe wall thickness are all as specified. We supply a mounting rail and a wall-thickness gauge with every clamp-on kit to remove the two largest error sources.
Yes, with clamp-on ultrasonic transducers. They mount on the outside of the pipe and require only a clean surface. The limitation is that the liquid must be homogeneous and the pipe must be sonically transparent, which excludes lined and heavily corroded pipe.
A vortex meter with a high-temperature sensor head. Vortex meters handle saturated and superheated steam, and with a built-in temperature sensor they can output compensated mass flow directly.
Every meter is calibrated on a gravimetric rig and shipped with a certificate showing the calibration factor and the test points. Recertification is available as a return-to-factory service.
Four to five weeks for PTFE-lined, three weeks for rubber-lined with a 4-20 mA output. Clamp-on kits ship from stock in 3-5 working days.
Tell us the application and we will confirm the right variant.