Clamp-on ultrasonic flowmeters for water and wastewater
Reliable flow measurement without process interruption
In water and wastewater operations, reliable flow measurement is essential: for capacity management, environmental compliance, process control or leak detection. Yet many pipelines are not equipped with inline instruments, or existing meters fail over time. Our clamp-on ultrasonic flowmeters provide a safe, accurate and cost-effective alternative.
The sensors are mounted on the outside of the pipe, without interrupting the water supply and without any risk of leakage. This makes it possible to retrofit flow measurement quickly and easily, without modifications to the piping system.
Specifications
- Accuracy: up to ±0.5% of measured value.
- Pipe diameters: from 5 mm.
- Temperature range: -40 °C tot +250 °C (depending on model).
- Measurement principles:
Transit-time: for clean to slightly contaminated liquids and gases.
Doppler: for heavily contaminated liquids (>30% particles/bubbles).
Electromagnetic: conductive fluids (low pressure drop / low maintenance). - Certifications: ATEX options available, calibrations in accordance with ISO 17025, quality assurance according to ISO 9001:2015 and VCA.
Applications in water & wastewater
Our clamp-on ultrasonic flowmeters are used in:
- Water treatment and wastewater facilities.
- Municipalities and water authorities (gravity sewers and pressure mains).
- Hydrants, distribution networks and drinking water supply.
- Industrial plants and process water systems.
- Agriculture and horticulture (irrigation and supply lines).
- Tunnels, civil engineering and public swimming pools.
Typical measurement tasks include: capacity monitoring, chemical dosing control, pump and valve performance, verification of inline flowmeters, leak or blockage detection, sludge measurements, flow surveys, and inflow/outflow comparisons.
Safe, non-invasive and flexible
Because pipes remain closed, there is no exposure to potentially hazardous wastewater contents and no risk of leakage. There are also no additional costs for process downtime, engineering or pipe modifications. The compact sensors are suitable for a wide range of pipe materials, including PE, GRE, steel and asbestos cement.
Measurement, service & support
In addition to purchases we provide permanent installation and flexible flow measurement services:
- Short-term rental, leasing or project-based deployment.
- 24/7 support in case of emergencies.
- Calibration and validation services (ISO 17025).
- On-site installation and reporting by experienced engineers.
With our in-house service workshop and field engineers, we guarantee fast delivery, maintenance and support throughout the Netherlands and Belgium and the rest of Europa.
Why choose our solution?
- Accurate and reliable measurement without pipe modifications
- Versatile: from clean water to heavily contaminated wastewater
- Fast delivery and on-site support: flexible, without long lead times
- Complete service: from purchase to rental and calibration
- Quality and safety guaranteed with ISO 9001:2015, VCA and ATEX options
Want to know which clamp-on or inline flow meter is best suited for your (waste)water application?
Contact us for a demo, advice, or a free quote.

KATflow 100
Standard fixed installation clamp-on ultrasonic flowmeter
KATflow 150
Advanced fixed installation clamp-on ultrasonic flowmeter
KATflow 200
Hand-held clamp-on ultrasonic flowmeter
KATflow 210
Transportable clamp-on ultrasonic flowmeter



