dBi Profibus
Pulsar dBi Profibus – Ultrasonic intelligent transducers

The dBi Profibus series transducers are a range of non-contacting, ultrasonic level sensors that make use of the widely used Profibus Protocols. The self-contained level sensors are available in a variety of different measurement ranges ranging from 125 mm to 15 m (4.9 in to 49.2 ft) to suit a wide range of applications from wastewater level measurement to industrial level requirements.
The dBi Profibus non-contacting level sensors are compatible with Profibus profile 3.0.2 and provide very high resolution to give exceptional accuracy and a rapid response time of 1 second! The sensors also benefit from Pulsar Measurement’s unique DATEM echo processing technology, so the level sensors are able to zone in on the true target and map out interferences.
The dBi Series Intelligent Transducer is a highly developed ultrasonic level
measurement system which provides non-contacting level measurement for
a wide variety of applications in both liquids and solids. Its unique design
gives unrivalled performance in echo discrimination and accuracy in a loop
powered device.
Easy calibration and maintenance free “fit and forget” performance mean
that you can install the dBi Series Intelligent Transducer Level Monitoring
System rapidly and with confidence, with calibration being achieved either
using a HART programmer/calibrator, or via a PC utilising the Pulsar
interface and software.
The dBi Series Intelligent Transducer operates on the principle of timing the
echo received from a measured pulse of sound transmitted in air and utilises
“state of the art” echo extraction technology.
Features
- Self-contained
- Two-wire
- Solids or liquids applications
- Various Mounting options
- ATEX Approvals
- DATEM digital echo processing software

Specifications
- Housing Material: Valox 357 PBT (Polybutylene terephthalate)
- Temperature Compensation: Internal temperature sensor, ±0.5 °C
- Transducer Cable Requirements: Twin screened. Integral cable length 5 m, 10 m, 20 m, and 30 m
- Operating Temperature: Process Temperature -40 °C to +80 °C
- Ingress Protection: IP68 to BS EN 60068-2-17:1995 and BS EN 60529 (Nema 6P available)
- Power: Bus-powered, per IEC 61158-2; 20mA (general purpose or I.S. version) 20mA 18-24 V DC
- Update Time: PA modem; Simatic PDM, EDDL, FDT/DTM on request. PC interface 2-wire loop powered from PC or laptop. No external power required.
- Outputs: Profile 3.0.2, Class A with I&M functionality