Flow Pulse® Pulsar Non-invasive Clamp-on Flow Sensor

Flow Pulse® is a unique, non-invasive flow sensor that clamps to the outside of a pipe and is simply secured with a screwdriver.

Flow Pulse offers you exceptional repeatability at a fraction of the cost of an equivalent mag flow meter. It can reliably monitor flow across a variety of pipe materials including rigid plastic, stainless steel, cast iron, and even corrugated pipes.

The Technology Within Flow Pulse :

Flow Pulse fires ultrasound through the pipe wall at 90 degrees to the flow via a tangentially mounted high-output ceramic. Ultrasound is refracted at angles across the axis of the flow and is then reflected from bubbles, particles and vortices in all directions and at a wide range of frequencies.

The returned signal is analyzed using Flow Pulse's Refracted Spread Spectrum Analysis (RSSA) digital signal processing platform to derive flow information. RSSA analyses and integrates the received signals over a wide frequency range then slices them for real-time analysis and flow rate calculation.

Specification :

Physical :

Sensor body dimensions:

120 x 65 x 65mm (4.75 x 2.6 x 2.6in)

Sensor body weight:

Nominal 1.5kg (3.3lbs)

Enclosure material/Description:

Type 316 stainless steel casting

Cable entry detail:

1 cable entry M20 x 1.5mm gland

Maximum separation:

Up to 500m (1640ft)

Environmental :

Enclosure protection:


Max. and min. temperature (electronics):

-20°C to +70°C (-4°F to +158°F)

Approvals :

CE approval:

Listed in the Certificate of Conformity within the manual

Performance :


±5% typical subject to installation and pipe conditions



Velocity range:

0.3 - 4.0m/s standard version or 0.3 - 10m/s high flow version

Response time:

Fully adjustable (1 second minimum)

Minimum particle size:


Minimum particle concentration:


Pipe diameter:

V1 = 30mm to 350mm (1.2 - 14in) or V2
= 30mm to 1250mm (1.2 - 49.2in)

Pipe wall thickness:

Metal or rigid pipe up to 20mm (0.8in) thick

Signal processing:

RSSA (Refracted Spread Spectrum Analysis)

Outputs :

Analog output:

4-20mA into a 1kΩ load (when supply voltage is 22Vdc or greater) with 20μA resolution and user programmable span.

Digital output:

Full Duplex RS232 to PC Software, Half Duplex RS485 to PC Software, Half Duplex RS485 with Modbus RTU

Volt-free contacts, number & rating:

1 form “C” (SPDT) rated at 1A at 24Vdc

Programming :

PC programming:

Via RS232 or RS485 using Flow Pulse PC

Programmed data integrity:

Via non-volatile RAM

Supply :

Power supply:

18 - 28Vdc

Power consumption:

2.4W @ 24V typical, 3W @ 24V maximum

Download Datasheet: Flow Pulse® Pulsar Non-invasive Clamp-on Flow Sensor

Reference : pulsar-pm.com

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