DUET Pulsar Dual Ultrasonic Echo Transducer

Pulsar's unique twin-transducer DUET provides the highest accuracy non-contact ultrasonic flow measurement system available anywhere.

Only DUET features Pulsar's unique, patented, approach to the issue of accuracy when temperature and echo reflection time varies. Both transducers fire together. By continuously monitoring the phase difference of the echoes, and because the distance between the transducer faces is known and constant, the speed of sound is continuously updated in real-time on the process. The resulting accuracy and stability are exceptional.

Features :

  • Unique patented non-contacting transducer
  • Insensitive to air temperature variations
  • 300mm deadband
  • Most accurate open channel flow system in the world!

Specifications :

Physical :


Nominal 205W x 640Hmm (8.07 x 25.19in)


Nominal 4.7kg (10.4lbs)


Transducers: Valox 357 U and syntactic foam face Bracket: 304 stainless steel

Cable lengths:

Standard = 5m, 10m, 20m, or 30m (16.4ft, 32.8ft, 65.6ft or 98.4ft).
Optional: up to 150m (492ft) maximum (increments of 10m / 32.8ft only)

Maximum separation:

500m (1640ft)

Mounting connection:

BSP or 1” NPT

Environmental :

Enclosure protection:

IP68 / NEMA 6P

Max. & min. temperature (electronics):

-40°C to +90°C (-40°F to +194°F)

MCERTS certification:

0.044% combined accuracy - MCERTS Class 1 – Sira MC090154/00

Approvals :

CE approval:

2014/30/EU - EMC & 2014/34/EU ATEX Directives.
Standards applied: EN 60079-0:2012+A11:2013/ EN 60079-11:2012 / EN  60079-18:2009 / EN 60079-26:2007 / EN 61326-1:2013

ATEX approval:

ATEX EEx m II T6 standard. FM/FMC approval available

Performance :

Measurement range:

0.3 - 2m (0.98 - 6.56t) from the face of the lower transducer (1.5m max. for MCERTS certification)



Beam Angle:


Controller compatibility:

FlowCERT only

Download Datasheet: DUET Pulsar Dual Ultrasonic Echo Transducer

Reference : pulsar-pm.com

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