DUET Dual Ultrasonic Echo Transducer

  • Unique patented non-contacting transducer
  • Insensitive to air temperature variations
  • 300 mm (11.8 in) Deadband
  • Most accurate open channel flow system in the world!
  • Description
  • Application Areas
  • Specifications
  • Brochure
  • User’s Guide

Product Description

The DUET is a unique product to Pulsar Measurement and features a patented approach when it comes to addressing the issue of accuracy for flow measurement. 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 for the process. As a result, the accuracy and stability of measurement readings are exceptional. The DUET Transducer System must be combined with the FlowCERT controller and benefits from MCERT Certification. This means that Pulsar Measurement meets the framework of standards set out by the Environment Agency to ensure that everyone involved in the monitoring of liquid flow is working towards the same standards and providing accurate flow data.

• High Accuracy Open Channel Flow Measurement
• Evironmental Compliance
• Influent/ Effluent Flow Monitoring
• Effluent Discharge Monitoring

General Specifications
Spec: Description:
Dimensions Nominal 205 mm (W) x 640 mm (H) (8.07 in (W) x 25.19 in (H))
Materials Transducers: Valox 357 U and syntactic foam face
Bracket: 304 stainless steel
Cable Length Standard: 5 m, 10 m, 20 m, or 30 m (16.4 ft, 32.8 ft, 65.6 ft, or 98.4 ft).
Optional: up to 150 m (492 ft) maximum; increments of 10 m (32.8 ft) only
Maximum Separation 500 m (1640 ft)
Mounting Connection BSP or 1 in NPT
Enclosure Protection IP68 / NEMA 6P
Operating Temperature (Electronics) -40 °C to +90 °C (-40 °F to +194 °F)
Measurement Range 0.3 m - 2 m (0.98 ft - 6.56 ft) from the face of the lower transducer; 1.5 m (5 ft) max. for MCERTS certification
Frequency 125 kHz
Beam Angle <10°
Controller Compatibility FlowCERT only

      Approvals

  • MCERTs Class 1 - 0.044% accuracy when combined with the FlowCERT Controller
  • CE Approval: 2014/30/EU - EMC & 2014/34/EU ATEX Directives
  • CE Standards applied:  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

Duet Brochure

Duet Data Sheet

Duet Conformityy Certificate

DUET MANUAL