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E8 · Thermal energy

Thermal energy for large pipes, tolerant of bubbles.

The E8 series ultrasonic energy meter is a transit-time ultrasonic flow meter designed with the latest digital technology and low-voltage broadband pulse transmission.

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E8 ultrasonic measurement instrument

At a glance

What E8 does, in plain words.

What it measures
Flow and thermal energy
Liquid flow plus supply and return temperatures, to work out heating or cooling energy.
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 E8

E8 in short.

The E8 series ultrasonic energy meter is a transit-time ultrasonic flow meter designed with the latest digital technology and low-voltage broadband pulse transmission. Principally designed for full-pipe clean liquids, it tolerates liquids with small amounts of air bubbles or suspended solids found in most industrial environments.

Where it is used
  • HVAC
  • Process industries
  • Energy management and environmental monitoring
  • Agriculture and irrigation systems
  • Facilities management
  • Industrial maintenance and troubleshooting
E8 · 2026 product catalog E8 · 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 →

  1. Measure the water flow.The ultrasonic sensors read flow through the pipe wall.
  2. Measure two temperatures.Temperature sensors measure the supply and return water.
  3. Calculate thermal energy.The meter combines flow and the temperature difference to give heating or cooling energy.

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 E8; 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
Flow ±0.5% of reading (0.5–5 m/s); energy ±2% of reading
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
Temperature sensor
0 °C to 180 °C (32 °F to 356 °F)
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 E8 yet.

Request the current datasheet or manual →

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