Clamp on flow switches and meters offer a non-invasive way to monitor liquid flow without interrupting production. This guide highlights five capable options, spanning ultrasonic and clamp-on sensor technologies, to help facilities select a reliable solution for seawater, drinking water, industrial liquids, or wastewater applications. Each product is summarized with core features to assist quick comparisons and informed purchasing decisions.
Summary of chosen products
| Product | Brand | Key Features |
|---|---|---|
| Bonvoisin Handheld Ultrasonic Flow Meter | Bonvoisin | Ultrasonic, clamp-on, data logger, real-time and historical data, 0.1–6 m/s, 0–110°C, liters/gallons, DN15-700mm |
| FD-Q20CH Clamp-On Flow Switch | Mechanivis | Non-invasive flow switch, compatible with pipe clamping, straightforward setup |
| FD-Q20C Clamp-On Flow Switch Sensor | Mechanivis | Compact clamp-on flow switch, reliable flow sensing for non-invasive installation |
| Meter Clamp-On Flow Transducer (DN50) | EQIMMFLJ | Digital non-invasive handheld flow meter, portable, clamp-on |
| Solimeta HFS-20 Clamp-On Flow Switch | Solimeta | Wide fluid compatibility, paddle-type sensor, SPDT output, IP54 |
Bonvoisin Handheld Ultrasonic Flow Meter
Bonvoisin offers a portable, non-destructive ultrasonic flow meter suitable for liquids such as seawater and industrial fluids. The device supports S1+M2 sensor configuration, enabling on-pipe transducer setup without halting processes. It features unit switching between liters and gallons, a data logger capable of recording up to 2000 data groups, and real-time as well as historical data viewing via software. Its accuracy is specified at ±1% with a linearity of 0.50% and a repeatability of 0.20%, and a velocity range of 0.1–6 m/s. Temperature tolerance spans 32–230°F (0–110°C). For larger DN ranges (DN300–6000mm) or 11.8–236″ sensors, additional contact is available from the supplier.
Mechanivis FD-Q20CH Clamp-On Flow Switch
FD-Q20CH from Mechanivis is a clamp-on flow switch designed for non-invasive flow sensing. The model emphasizes ease of setup and installation on piping without disrupting the process. It is suitable for various liquids where continuous flow monitoring is critical, offering a reliable switch output for control systems and alarms in industrial environments.
Mechanivis FD-Q20CH Clamp-On Flow Switch (Alternate Listing)
This listing reiterates the clamp-on approach for non-invasive flow sensing, featuring the same model family and installation benefits. It is suitable for operators seeking consistent flow detection without the need to cut pipes or stop operations, supporting straightforward integration with existing control systems.
FD-Q20C Clamp-On Flow Switch Sensor
The FD-Q20C is a compact clamp-on flow switch sensor variant within the same family, offering reliable flow detection with non-invasive installation. It is suitable for continuous monitoring in various industrial liquids and supports integration with automation or alarm systems in plant environments.
Meter Clamp-On Flow Transducer (DN50)
EQIMMFLJ’s DN50 handheld flow meter combines a clamp-on transducer with a digital, non-invasive measurement approach. It is designed for portable use, providing liquid flow readings in a compact form factor. This model supports a range of liquid applications, enabling quick on-site measurements without pipe modification.
Solimeta HFS-20 Clamp-On Flow Switch
Solimeta’s HFS-20 is a paddle-type, clamp-on flow switch designed for wide fluid compatibility and robust operation. It features SPDT output and IP54 protection, making it suitable for challenging industrial environments where dependable flow signaling is essential. The device supports compatibility with a variety of liquids and pipe sizes, offering flexible integration into control systems.
Buying Guide: Key Purchase Considerations
- Measurement principle: Choose between ultrasonic clamp-on meters (non-contact, suitable for many liquids) and paddle-type flow switches (robust signaling for on/off control).
- Pipe size and material: Verify DN range compatibility and whether the sensor clamps onto the pipe without disassembly. Larger DN ranges may require special sensors or configurations.
- Liquid compatibility: Ensure the device is rated for your liquids (seawater, industrial fluids, wastewater, oils, etc.). Some models emphasize broad compatibility, others focus on water-based applications.
- Communication and data: Some units include internal data loggers and software for real-time and historical data. Consider whether you need on-device logging or remote access.
- Output and integration: Check for SPDT/NO-NC outputs, PLC compatibility, and alarm signaling capabilities. Confirm required electrical ratings and communication protocols.
- Installation impact: Clamp-on designs avoid pipeline disruption, which is ideal for live systems. Assess mounting options, transducer placement, and potential vibration sensitivity.
- Accuracy and range: Review specified accuracy, linearity, and repeatability. Consider the velocity or flow rate range to ensure coverage of your normal operating conditions.
- Environment and protection: Look at IP ratings and temperature ranges to ensure reliable operation in harsh environments or extreme temperatures.
- Support and accessories: Some products offer software, data download tools, or additional L2/L2+ sensors for extended measurement ranges; verify availability and any extra costs.
- Maintenance and calibration: Consider calibration requirements, replacement parts, and the expected maintenance schedule to minimize downtime.
When selecting a clamp-on flow solution, match the device capabilities to your application’s needs—liquid type, required data access, whether non-invasive monitoring suffices, and how critical continuous signaling is for process control. The featured products provide a spectrum of options from portable ultrasonic meters to robust, non-invasive switch sensors, enabling informed, application-specific choices for American facilities.