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Explore our flow sensors & meters for accurate, reliable fluid measurement - from compact to industrial-grade models.
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The SNS11 is a compact 3/4" flow sensor designed for precise measurement of liquid flow in various applications. It features a robust construction suitable for both residential and industrial use. The sensor operates efficiently with minimal pressure drop, ensuring accurate flow rate readings. Ideal for integration into automated systems, the SNS11 offers reliable performance, durability, and easy installation. Its small size makes it perfect for use in tight spaces while maintaining high measurement accuracy.
| Specification | Details |
|---|---|
| Thread Size | ¾” male BSPP |
| Pressure Rating | 10 bar |
| Temperature Rating | 70 °C |
| Nominal Flowrate | 30 l/min |
| Minimum Accurate Flowrate | 0.5 l/min |
| Pressure Loss | 0.25 bar @ 15 l/min |
| Durability | 25 million litres @ 15 l/min |
| Body Material | Glass Fiber reinforced Polyphenylene plastic |
| Connection | 4m, 3 core cable |
| Resolution | 1.9ml per pulse |
The SNS20-5 is a medium 1"-1.25" flow sensor designed for precise and reliable measurement of liquid flow in a variety of applications. It offers robust construction and accurate readings, making it ideal for both industrial and commercial use. Easy to install and integrate, the SNS20-5 ensures dependable performance even in demanding environments.
| Specification | SNS20 | SNS25 |
|---|---|---|
| Plumbing Connection | 1” male BSPP | 1 1/4” male BSPP |
| Nominal Diameter, DN (mm) | 20 | 25 |
| Pressure Rating | 16 bar | 16 bar |
| Temperature Rating | 90°C | 90°C |
| Body Material | Brass | Brass |
| Nominal Flowrate | 60 l/min | 90 l/min |
| Minimum Accurate Flowrate | 0.5 l/min | 0.5 l/min |
| Pressure Loss | 0.08 bar @ 1.8 m3/h | 0.07 bar @ 2.7 m3/h |
| Resolution | 8.4ml per pulse | 13.9ml per pulse |
| Electrical Connection | 3 core cable | 3 core cable |
Full bore, highly accurate and reliable ultrasonic meter, pre-programmed for maximum resolution ideal for leak detection.
| Specification | Details (MTR40) | Details (MTR50T) |
|---|---|---|
| Plumbing Connection | 2” (to 1.5” unions) | 2.5” (to 2” unions) |
| Nominal Diameter, DN (mm) | 40 | 50 |
| Pressure Rating | 16 bar | 16 bar |
| Temperature Rating | 50 Celsius | 50 Celsius |
| Nominal Flowrate | 40 m³/h | — |
| Minimum Accurate Flowrate | 2.7 l/min | 1.3 l/min |
| Pressure Loss | 0.05 bar @ 20m³/h | — |
| Resolution | 0.1 litre per pulse | — |
| Dimensions (mm) |
L = 300 W = 113 H = 155 h = 35 |
L = 300 W = 113 H = 155 h = 35 |
| Weight (kg) | 1.4 | 1.45 |
| Electrical Connector | 5m, 3 core cable to terminal block | |
These ultrasonic meters have no moving parts and are extremely sensitive at low flow. These extra large meters come in 2”, 2.5”, 3”, 4”, 6” and 8” sizes.
| Specification | MTR50 | MTR65 | MTR80 | MTR100 | MTR150 | MTR200 |
|---|---|---|---|---|---|---|
| Item Code | MTR50 | MTR65 | MTR80 | MTR100 | MTR150 | MTR200 |
| Plumbing Connection | 2” | 2.5” | 3” | 4” | 6” | 8” |
| Nominal Diameter, DN (mm) | 50 | 65 | 80 | 100 | 150 | 200 |
| Maximum Flowrate (m³/h) | 50 | 50 | 80 | 125 | 313 | 500 |
| Minimum Flowrate (l/min) | 0.5 | 0.5 | 0.5 | 0.5 | 3.5 | 3.5 |
| Pressure Loss at Maximum Flowrate (bar) | 0.15 | 0.14 | 0.16 | 0.17 | 0.15 | 0.13 |
| Resolution (litres per pulse) | 0.1 | 0.1 | 0.1 | 1 | 1 | 1 |
| Pressure Rating | PN16 * | |||||
| Temperature Rating | 50 Celsius | |||||
| Body Material | Cast iron | |||||
| Flange Connections | Lugged Flanged according to ISO, BS10, and ANSI150 | |||||
| Dimensions, L x W x H, h (mm) | 200 x 165 x 194, 40 | 200 x 185 x 210, 90 | 225 x 200 x 210, 90 | 250 x 220 x 223, 103 | 300 x 285 x 282, 140 | 350 x 340 x 332, 165 |
| Weight (kg) | 9 | 11.5 | 13 | 15 | 32 | 45 |
| Electrical Connector | 5m, 3 core cable | |||||
The clamp-on meter is easy to install onto a pipe from the outside without interrupting the water inside. The flowmeter comes in 2 sizes for pipes made from steel, stainless steel, plastic and copper;
• Small: DN25-DN115 (1”-4”)
• Large: DN125-DN180 (5”-6”)
• Zero Cut-off: 0.02 m/s.
• Accuracy < ± 10% of the actual measured flow rate from 0.1m/s.
• Accuracy < ± 3% of the actual measured flow rate from 0.3m/s.
• Max velocity = 10 m/s.
Flow rate equivalents:
| Pipe Size | Zero cut-off | 0.1 m/s | 0.3 m/s | 10 m/s |
|---|---|---|---|---|
| DN20 | 0.5 l/min | 2.3 l/min | 6.8 l/min | 228 l/min |
| DN25 | 0.7 l/min | 3.4 l/min | 10.3 l/min | 343 l/min |
| DN40 | 1.6 l/min | 8.1 l/min | 24.3 l/min | 811 l/min |
| DN50 | 2.7 l/min | 13.7 l/min | 41.2 l/min | 1374 l/min |
| DN65 | 4.9 l/min | 24.5 l/min | 73.5 l/min | 2449 l/min |
| DN80 | 6.8 l/min | 34 l/min | 101.9 l/min | 3396 l/min |
| DN100 | 10 l/min | 50 l/min | 150 l/min | 4999 l/min |
Quensus flow-based devices accommodate pipe sizes up to 8″, so a single monitoring approach can cover mains supplies across commercial, industrial, and multi-occupancy buildings without forcing a downgrade in measurement quality.
Why it matters: estates often mix pipe diameters between plant rooms, risers, and tenant supplies. A platform that scales with pipe size reduces bespoke engineering, speeds specification, and keeps leak thresholds meaningful on high-volume lines where small percentage losses still mean large volumes of water.
Available on LeakNet Gen2, LeakNet Gen1, Flow Sensors & Meters, LeakNet LP Data Logger, SiteNet for Construction, and Valves. The same capability supports everything from permanent building installs to temporary site protection.
Automated machine learning continuously learns normal water consumption patterns for each site, establishing baselines without manual threshold tuning.
Why it matters: fixed flow limits generate false alarms in buildings with variable occupancy, seasonal plant, or mixed-use profiles. Adaptive learning reduces nuisance alerts, catches subtle anomalies earlier, and helps facilities teams focus on genuine escapes rather than routine usage spikes.
Included across LeakNet Gen2, LeakNet Gen1, Flow Sensors & Meters, and LeakNet LP Data Logger, giving portfolio-wide intelligence from permanent installs to remote metering.
A local LED flowrate indicator shows live leak severity on the device, so engineers can assess conditions without opening the app.
Why it matters: during call-outs, commissioning, or network outages, on-site teams need immediate context. A visible flow indication speeds triage, supports handover documentation, and helps contractors verify shut-off or bypass states before leaving site.
Featured on LeakNet Gen2 and Flow Sensors & Meters for at-a-glance diagnostics alongside FlowReporter reporting.
Quensus devices integrate with existing Building Management Systems (BMS), feeding alarms and status into the platform facilities teams already monitor.
Why it matters: duplicate dashboards get ignored. BMS integration puts water events alongside HVAC, access, and fire signals, improving escalation paths and supporting estates that require centralised alarm management, even when cloud connectivity is limited.
Supported on LeakNet Gen2, Flow Sensors & Meters, SiteNet for Construction, and Valves.
Flow-based leak detection identifies abnormal usage and can automatically shut off the water supply to contain damage.
Why it matters: the cost of escape-of-water claims is driven by duration, not just volume. Automatic shut-off turns a potentially catastrophic overnight leak into a contained event, protecting stock, finishes, and neighbouring units while insurers and FM teams regain control.
Core to LeakNet Gen2, LeakNet Gen1, Flow Sensors & Meters, and Valves when paired with Quensus monitoring.
Instant notifications via SMS, email, and the FlowReporter mobile app keep teams informed wherever they are working.
Why it matters: different roles live on different channels. Multi-channel alerting maximises the chance someone actionable sees the event within minutes, which is critical when average escape-of-water claims run to thousands of pounds per hour of unchecked flow.
Standard across LeakNet Gen2, LeakNet Gen1, Flow Sensors & Meters, LeakNet LP Data Logger, and SiteNet for Construction.
Device has a built-in LED indicator for showing the current flow rate.
Monitor the flow rate at this moment in time remotely from the app, making it easy to find & fix leaks.
View consumption in events/minutes/days/months and what this means in terms of bills.
Compare different areas or locations to provide reports and enhance anomaly detection.
Group devices to provide enhanced reporting, comparison and anomaly detection
Device has a built-in audible alarm for alerts.
BMS Output (Alert and/or valve status).
Protect large areas with a 5m-100m leak cable for immediate detection of leaks.
Monitor the ambient temperature and automatically shut the water off to prevent freezing.
Remote programming of device.
Integration with wireless splash sensors.
Receive real-time leak notifications on your phone for rapid response.
Get multiple alert channels (SMS, Email) to ensure critical issues aren't missed.
Via app notification, SMS and email alerts.
Override alerts at set dates if you are expecting a temporary change in usage (high or low).
Advanced algorithms pinpoint even the smallest drips, enhancing low flow accuracy of flow sensors.
Shut-off immediately to prevent damage from burst pipes using the maximum flowrate normally observed.
Harness the power of machine learning to adapt leak detection based your normal usage
Automatic shut-off using maximum time, volume, flowrate, leak cable
Compatible with solenoid and motorised valves up to 8".
Valve bypass for fire sprinkler override functionality.
Remotely shut the water off or open the valve to let water through and temperature (freezing)
Scheduled shut-off and open at different times of the day.
Automatically shut off water supply in areas of prolonged inactivity to prevent waste and mitigate risks.
Identify areas where water has been stagnant for preset period and purge water supply to mitigate legionella risk.
Ensure the reliability and longevity of your fittings by regularly exercising valves to prevent seizing.
Always have the latest firmware.
Shared access with unlimited users.
No WiFi? No problem. We can provide a completely closed, plug-and-play system.
Peace of mind with up to 3 years (LeakNet panel) and 5 years (splash sensors) coverage.
Get replies within a day about your issue
Making sure devices are installed correctly.
Helping you to make sense of the data, program alerts, and co-ordinate leak finding and fixing
Tailored water management plan that builds around your needs
Guarantee proper installation and end-user training for optimal performance.
Clear guidance for leak response, minimising confusion.
Streamline the design process with expert consultation and clear installation specifications.
Seamlessly integrate realtime water data with your existing building management systems, analytics platforms, or custom applications.
Receive custom monthly reports highlighting water usage, leak alerts, and savings opportunities. Easily prove sustainability goals and other KPIs.
Device has a built-in LED indicator for showing the current flow rate.
Monitor the flow rate at this moment in time remotely from the app, making it easy to find & fix leaks.
View consumption in events/minutes/days/months and what this means in terms of bills.
Compare different areas or locations to provide reports and enhance anomaly detection.
Device has a built-in audible alarm for alerts.
BMS Output (Alert and/or valve status).
Protect large areas with a 5m-100m leak cable for immediate detection of leaks.
Remote programming of device.
Monitor the ambient temperature and automatically shut the water off to prevent freezing.
Integration with wireless splash sensors.
Harness the power of machine learning to adapt leak detection based your normal usage.
Get multiple alert channels (SMS, Email) to ensure critical issues aren't missed.
Via app notification, SMS and email alerts.
Override alerts at set dates if you are expecting a temporary change in usage (high or low).
Advanced algorithms pinpoint even the smallest drips, enhancing low flow accuracy of flow sensors
Shut-off immediately to prevent damage from burst pipes using the maximum flowrate normally observed.
Harness the power of machine learning to adapt leak detection based your normal usage.
Automatic shut-off using maximum time, volume, flowrate, leak cable.
Compatible with solenoid and motorised valves up to 8".
Valve bypass for fire sprinkler override functionality.
Remotely shut the water off or open the valve to let water through and temperature (freezing).
Scheduled shut-off and open at different times of the day.
Automatically shut off water supply in areas of prolonged inactivity to prevent waste and mitigate risks.
Identify areas where water has been stagnant for preset period and purge water supply to mitigate legionella risk.
Compare different areas or locations to provide reports and enhance anomaly detection
Always have the latest firmware.
Shared access with unlimited users.
Insurance requirements are getting more stringent, but we are here to help with best practices.
No WiFi? No problem. We can provide a completely closed, plug-and-play system.
Group devices to provide enhanced reporting, comparison and anomaly detection.
Get replies within a day about your issue.
Making sure devices are installed correctly.
Helping you to make sense of the data, program alerts, and co-ordinate leak finding and fixing.
Tailored water management plan that builds around your needs.
Guarantee proper installation and end-user training for optimal performance.
Clear guidance for leak response, minimising confusion.
Streamline the design process with expert consultation and clear installation specifications.
Seamlessly integrate realtime water data with your existing building management systems, analytics platforms, or custom applications.
Receive custom monthly reports highlighting water usage, leak alerts, and savings opportunities. Easily prove sustainability goals and other KPIs.
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