Multi-path measurement, one to six channels.

A high-accuracy multi-path ultrasonic flow meter for precise liquid measurement across industries.

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D348D Plus ultrasonic measurement instrument

At a glance

What D348D Plus does, in plain words.

What it measures: Liquid flow; How much liquid moves through the pipe.
How it installs: Not confirmed yet; Ask an engineer for this model.
How it connects: RS485 / 4–20 mA; Wired into control systems over Modbus RS485, or as a 4–20 mA signal.
Pipe sizes: DN25–DN5000; DN is the nominal pipe size, roughly the inside diameter in millimetres.

Why D348D Plus

D348D Plus in short.

A high-accuracy multi-path ultrasonic flow meter for precise liquid measurement across industries. With 1 to 6 channels it uses advanced ultrasonic technology for high accuracy, and the robust design and user-friendly interface simplify installation and maintenance. Suited to water management, chemical processing and more.

Where it is used

Water, sewage (low particle content) and seawater
Water plants
Sewage treatment plants
Plant irrigation
Cooling water
Energy-saving monitoring
Water-saving management

D348D Plus · 2026 product catalog

Specifications

Check the fit before you specify.

The short version is above. These are the specifications published for D348D Plus; values that are still being checked are left out.

Performance

Flow velocity: ±0.01 to ±7 m/s (±0.03 to ±23 ft/s)
Pipe size: 25–5000 mm (1″–200″)
Accuracy: ±0.5% of reading (0.5–5 m/s)
Repeatability: 0.1%
Pipe material: Carbon steel, stainless steel, cast iron, ductile iron, copper, PVC, aluminium, asbestos, fibreglass-epoxy

Function

Communication: RS485 with Modbus protocol
Analogue output: 4–20 mA, max. load 750 Ω
Pulse output: 0–9999 Hz, OCT, adjustable frequency limits
Relay output: Max. 1 Hz, 1 A at 125 VAC or 2 A at 30 VDC
Data storage: TF card, more than 1000 days
Power supply: 90–250 VAC (48–63 Hz) or 10–36 VDC

Physical

Ambient temperature: −10 °C to 50 °C (14 °F to 122 °F)
Transducer temperature: −40 °C to 80 °C (−40 °F to 176 °F), standard
Ingress protection: Transmitter IP65, transducer IP68
Transducer cable: 9 m (29.5 ft) standard

Need a value that is not listed, or the datasheet for your configuration? Ask an engineer.

What these terms mean

DN: Nominal pipe size, roughly the inside diameter in millimetres (DN50 ≈ 50 mm).
Clamp-on: Sensors strap to the outside of the pipe. No cutting, no shutdown for installation.
PoE: Power over Ethernet: one network cable carries power and data.
LoRaWAN: Long-range, low-power wireless. Readings travel through a gateway to a network server.
Modbus RS485: A wired connection widely used by building and industrial control systems.
4–20 mA: An analogue signal where the current represents the reading.