dB Transducer Series

Non-contacting ultrasonic transducers for level measurement

Pulsar’s dB series of non-contacting ultrasonic transducers offer compact, robust measurement utilising a low power transducer design. I.S. certified versions are available. The dB transducer series use standard interconnecting cables – yet produce extremely high acoustic power to give exceptional results in a wide variety of challenging applications.


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Features for all dB Series Transducers:

  • ATEX Zone 1 and 2 standard
  • S. ATEX Zone 0 options
  • FM/FMC approval
  • Integral temperature compensation
  • Narrow beam angles
  • IP68/NEMA 6P
  • Standard 2 or 3 core screened cable extensions to 1000m
  • Patented DATEM (Digital Adaptive Tracking of Echo Movement) echo processing technique

The Ultrasonic dB Transducer Models

 dB3 Transducer

125mm-3m range (0.41-10ft)
125kHz, 19mm (0.75in) dia face, <10° beam angle
Options available:- standard | front threaded | front threaded PVDF | submergence shield | I.S. of all of these options.

dB6 Transducer

300mm-6m range (0.98-20ft)
75kHz, 30mm (1.18in) dia face, <10° beam angle
Options available:- standard | PVDF | front threaded | front threaded PVDF | submergence shield | flanged DIN/ANSI | sanitary flange | I.S. of all of these options.

dBS6 Transducer

200mm-6m range (0.66-20ft)
50kHz, 45mm (1.78in) dia face, <10° beam angle
Options available:- standard | PVDF | front threaded | front threaded PVDF | submergence shield | flanged DIN/ANSI | sanitary flange | foam face | I.S. of all of these options.

dB10 Transducer

300mm-10m range (0.98-33ft)
50kHz, 45mm (1.78in) dia face, <10° beam angle
Options available:- standard | PVDF | front threaded | front threaded PVDF | submergence shield | flanged DIN/ANSI | sanitary flange | foam face | I.S. of all of these options.

dB15 Transducer

500mm-15m range (1.64-50ft)
41kHz, 60mm (2.36in) dia face, <8° beam angle
Options available:- standard | submergence shield | flanged DIN/ANSI | foam face | I.S. of all of these options.

dB25 Transducer

600mm-25m range (1.97-82ft)
30kHz, 78mm (3.07in) dia face, <6° beam angle
Options available:- standard | submergence shield | foam face | I.S. of all of these options.

dB40 Transducer

1.2m-40m range (3.94-130ft)
20kHz, 160mm (6.30in) dia face, <5° beam angle
Options available:- standard | foam face | I.S. of all of these options.

dB50 Transducer

2m-50m range (6.56-164ft)
20kHz, 160mm (6.30in) dia face, <5° beam angle
Options available:- standard | foam face | no I.S. options | can only be used with a modified Ultra 3 or Ultra 5 controller

Transducer Options Explained:

PVDF face

A PVDF face is suitable for many applications where chemicals are present. Please consult Pulsar regarding your application needs. 

 Submergence Shield

A shield can be fitted during manufacture to keep the transducer face clean and dry in applications at risk of submergence. In this situation, the transducer continues to read a high level. When the level drops back below the shield, it allows the controller to resume operation with a clean transducer face.

Front Threaded Versions

Available in standard or PVDF options. Front threaded versions allow for easy mounting – either 1.5″ or 2″ BSP/NPT nose thread.

Flanged Transducers

Available in DIN or ANSI flange specification – all featuring full PTFE coating on the process wetted side. Various flange sizes are available. Maximum vessel pressure on flanges is 0.5bar (7psi). These incorporate the performance features of the standard products but additionally offer a front thread mount option to suit threaded nozzles or flanged tank entries. PTFE is a chemical resistant material – please consult Pulsar regarding your application needs. 

Foam Face

A foam faced transducer provides more acoustic power output in dry and dusty environments. This higher acoustic power output increases return echo strength in these dry applications.

Sanitary Flange

A santiary flange option includes a full face PVDF seal for use in hygienic applications and 3″ sanitary flange which allow Tri-Clamp fittings to be used on tanks or vessels.

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