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F8 · Fixed flow

Large-pipe flow with RS485, RS232 and WiFi.

F8 is a wall-mounted ultrasonic flow meter for pipes from 25 to 5000 mm.

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F8 ultrasonic measurement instrument

At a glance

What F8 does, in plain words.

What it measures
Liquid flow
How much liquid moves through the pipe.
How it installs
Clamp-on
Sensors fit on the outside of the pipe, so the pipe stays closed.
How it connects
WiFi
Wireless over your WiFi network, with readings stored in the cloud.
Pipe sizes
DN25–DN5000
DN is the nominal pipe size, roughly the inside diameter in millimetres.

Why F8

F8 in short.

F8 is a wall-mounted ultrasonic flow meter for pipes from 25 to 5000 mm. It connects over RS485 and RS232 (Modbus) and WiFi, with 4–20 mA, pulse and relay outputs and TF-card logging for more than 1000 days.

Where it is used
  • Water and sewage treatment plants
  • Plant irrigation
  • Metallurgy and mining
  • Petroleum and chemicals
  • Food and medicine
  • Energy-saving monitoring
  • Air conditioning
F8 · 2026 product catalog F8 · 2026 product catalog

How it works

Sound with the flow arrives sooner.

Two sensors on the same side of the pipe take turns sending sound through the water. Sound travelling with the flow arrives slightly sooner than sound travelling against it; the meter turns that time difference into flow, which is why it needs to know your pipe.

How clamp-on ultrasonic measurement works →

Pipe & installation

What the meter needs to know about your pipe.

These are set up on the meter after installation. Pipe size and transducer type are decided when ordering.

Pipe & installation guide pipe materials, sizes, setup checklist

Stainless steel · 2″ example

A smooth metal surface. Clean the spot, add coupling gel, then clamp the sensor on.

60.3mmacross the outside
2.8mmwall thickness
54.8mmacross the inside

Pipe sizes are names, not measurements: a 2″ pipe is 2.375″ across.

The meter needs Pipe size Wall thickness Material: Stainless steel
Technical details standards, OD / ID, both units
Standard
ASME B36.19 · 2″ Sch 10S
Outside diameter (OD)
2.375″ (60.33 mm)
Wall
0.109″ (2.77 mm)
Inside diameter (ID)
2.157″ (54.79 mm)
Meter parameters
OD · wall · material

This guide shows what a clamp-on meter needs to know about a pipe. It does not mean every model fits every pipe: check the specifications below or ask an engineer.

Specifications

Check the fit before you specify.

The short version is above. These are the specifications published for F8; values that are still being checked are left out.

Performance

Flow velocity
±0.01 to ±12 m/s (±0.03 to ±40 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 and RS232 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
Wireless
WiFi
Power supply
90–245 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.

Documents

Datasheets and manuals.

No reviewed documents are published for F8 yet.

Request the current datasheet or manual →

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