Each measurement solution comprises a reader unit (also referred as interrogator) and the sensor mounted with its associated antenna. The interrogation distance between the sensor and the reader unit reaches up to several meters in open space. The technological advantage behind surface acoustic waves relies on the reverse piezoelectric effect.
These latest wireless temperature sensing solutions for harsh environments are specifically tailored for new applications until now unexpected regarding critical equipment monitoring as well as process control.
A New Generation
SENSeOR announces three unique wireless temperature sensing solutions based on SAW (Surface Acoustic Wave) sensors particularly designed for the most demanding industrial applications.
More than a rudimentary wireless measure, SENSeOR’s innovative solutions own a very special feature: they are completely passive and only powered by the energy of radio waves emitted by the associated reader unit when interrogating the devices in real-time, making the ensuing benefits unique.
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According to SENSeOR, their sensing solutions are appropriate for explosive atmospheres or irradiated environments at temperatures reaching +175°C due to the absence of batteries and active electronic components. In addition, by avoiding problematical wires these maintenance-free and light-weight sensors can either be mounted onto an extensive range of rotating and moving machinery parts or be implemented in inaccessible places.
As a result, two thermowell-packaged wireless temperature probes SED-100 and SED-120 have been launched onto the market, dedicated to wireless temperature measurements inside critical equipments and industrial processes; and they also comply with well-established standards within the industry. Furthermore, SENSeOR is pleased to announce the market launch of a novel system to monitor surface temperature, namely SA-D003.
Robust, Mature & Unique
Each measurement solution comprises a reader unit (also referred as interrogator) and the sensor mounted with its associated antenna. The interrogation distance between the sensor and the reader unit reaches up to several meters in open space. The technological advantage behind surface acoustic waves relies on the reverse piezoelectric effect.
The electromagnetic wave sent by the interrogator is received then converted into an acoustic wave by means of a transducer located at the surface of a piezoelectric crystal (typically quartz).
Temperature variations related to the nearby environment of the SAW sensor trigger a modification of the acoustic wave’s physical properties when propagating along the surface of the device. In return, the modified acoustic wave is then transformed back into an electromagnetic wave to be retrieved by the reader unit.
The integrated building block of those above-presented sensing solutions, SE-AS10 SAW sensor, is also available as a sole device, capable to sense temperatures ranging from -20° to +175°C with a measurement precision of ±2°C. This tiny sensing element (only 5 x 5 x 1.5 mm³) can be associated with different types of customized antennas, depending on the environment characteristics as well as implementation constraints.
Promising Industrial Applications
Condition monitoring allows planning maintenance operations when necessary. Andreas Jagtøyen, General Manager Machinery Instrumentation at Kongsberg Maritime AS (Norway), a partner who has industrialized a SAW-based in-engine bearing temperature sensor for vessel motors, confirms “we have installed thousands of systems working in the toughest conditions – and none of the sensors have failed. We will use this technology for other break-through applications”.
For more information visit www.senseor.com