Transit-Time Technology — One, Two, or Four-Channel Configurations for Every Application

Ultrasonic Flow Meters are precision instruments that measure the volumetric flow rate of liquids through closed pipes using transit-time ultrasonic technology — one of the most accurate, durable, and operationally efficient flow-measurement methodologies available in modern industry. Two ultrasonic transducers mounted on (or in) the pipe send ultrasonic pulses both with and against the direction of fluid flow; the time difference between the upstream-traveling pulse and the downstream-traveling pulse is directly proportional to fluid velocity. 

Multiplied by the pipe cross-sectional area, this transit-time difference delivers high-precision volumetric flow rate independent of the liquid's acoustic properties meaning no pressure drop, no maintenance-prone bearings, no wear-and-replace cycles, and dramatically lower lifecycle cost across multi-decade service deployments.

Qualitest's Ultrasonic Flow Meter Multi-channel Series brings transit-time ultrasonic precision to every installation environment through three complementary platforms, each engineered for specific operational scenarios. The Clamp-on Ultrasonic Flow Meter mounts transducers externally on the pipe surface making it the ideal solution for retrofit installations on operational water-distribution networks, large-diameter pipes (where inline alternatives become prohibitively expensive), and temporary metering surveys. 

The Flange-type Ultrasonic Flow Meter is the inline-installed precision platform — a flanged metering spool plumbed directly into the pipeline during scheduled shutdown or new-construction, delivering the highest permanent-installation accuracy required for trade-settlement, custody-transfer, and regulatory-billing applications. And the Insertion-type Ultrasonic Flow Meter combines direct-fluid-contact accuracy with non-stop installation — the transducer inserts into the pipe through a specialized opening tool without shutting off the water flow, providing stable, reliable, wetted-transducer measurement for medium-to-large diameter water mains, energy monitoring retrofits, and applications where flow interruption is operationally unacceptable.

All three Qualitest ultrasonic flow meter platforms share a common engineering foundation: advanced intelligence + integrative mixed signal processing technology delivering high-precision measurement results, IP-protected housings engineered for industrial-environment durability, and flexible multi-channel architecture supporting one-channel, two-channel, or four-channel configurations through user-selected converter-and-transducer combinations. 

Measure Every Flow. Optimize Every Operation.

In every water utility, every wastewater treatment plant, every petrochemical refinery, every power station, every mining operation, and every district-heating network worldwide, accurate flow measurement is the silent foundation of operational efficiency, regulatory compliance, and commercial billing accuracy. 

A failed mechanical flow meter means undetected water loss, unbilled custody transfers, hidden energy waste, and missed contamination events; an inaccurate orifice plate means production-blending errors, regulatory non-compliance, and lost revenue across multi-year operating periods. The water utilities, industrial operators, energy networks, and commercial-billing organizations that consistently deliver precise, regulator-compliant, audit-ready flow data are the ones equipped with ultrasonic flow meters built for transit-time precision, multi-channel architecture, and full operational-deployment flexibility — and the Qualitest Ultrasonic Flow Meter Multi-channel Series gives you exactly that.

Whether you are commissioning a new municipal water-distribution metering station, retrofitting district-metering-area flow measurement across a buried utility network, supporting petrochemical custody-transfer for regulatory billing, installing large-diameter water-main metering without service interruption, or building energy-monitoring submetering programs for commercial buildings, Qualitest has the ultrasonic flow meter engineered to meet your exact needs. From the non-invasive Clamp-on platform to the precision Flange-type spool and the non-stop Insertion-type wetted-transducer system, every Qualitest ultrasonic flow meter delivers world-class performance backed by industry-leading service and support.