Infrasound Sensors
iTem srl develops and sells infrasound sensors designed for various applications. The easiest and cheapest way to detect infrasound waves produced by different sources such as volcanoes, explosions, debris flows, snow avalanches, calving fronts, lahars and pyroclastic flows.
The iTem-prs series of infrasound sensors are designed for easy field deployment, low power consumption, stable operation, wide bandwidth and robust weather sealed construction.
Our sensors have been installed and are currently deployed on many active volcanoes as Stromboli Etna in Italy, Turrialba in Costa Rica, Tungurahua in Ecuador, Sakurajima and Asama in Japan, Iceland among the others all around the world.
The reliability and versatility of a medium/high sensitivity range together with the low price makes iTem-prs Series a tough and accessible pressure sensors for a wide spectrum of users.
The choice of the sensors strongly depends on your research target and we have different sensitivity and pressure range. We provide different kinds of infrasound sensors as well as infrasound arrays that can be used for various purposes.
Below a quick description of the different sensors and the common use that should be chosen according to the research projects.
Prs0025f : differential pressure transducer with sensitivity of 400mV/Pa, 25 Pa pp, 0.2-100Hz, fiber optic output for array deployment with the FIBRA infrasound array.
This sensor is specifically designed to be operated in very hostile environmentals, the fiber optic output prevents significant signal loss even for large array deployement and dramatically reduces the risk of system damages caused by lightning.
Commonly used for, mass movemets (avalanches, debris flows, glacier collapses, lahars), meteo (thunder, microbarom).
- Quick field deployment
- Low power consumption
- 0.2 Hz to 100 Hz bandwidth
- 4-port manifold for wind-noise reduction array
- Fiber optic output
- Low noise floor
- High dynamic range
Prs0025a : differential pressure transducer with sensitivity of 800mV/Pa, 25 Pa pp*, 0.04-100Hz, analogue differential output -10,+10V
Commonly used for, mass movemets (avalanches, debris flows, glacier collapses, lahars), meteo (thunder, microbarom).
- Quick field deployment
- Low power consumption
- 0.04 Hz to 100 Hz bandwidth
- 1-port manifold
- Analogue differential output
- Low noise floor
- High dynamic range
*different pressure range are available on request
Prs0250a : differential pressure transducer with sensitivity of 10mV/Pa, 500 Pa pp, 0.1-100 Hz, analogue output, 0-5V sigle-ended. Commonly used for volcano monitoring.
Prs0100a : differential pressure transducer with sensitivity of 25mV/Pa, 200 Pa pp, 0.1-100 Hz, , analogue output, 0-5V sigle-ended. Commonly used for volcano monitoring, mass movemets, meteo (thunder, microbarom).
FIBRA Infrasound Array
The FIBRA fiber optic array is a low power, versatile acquisition system specifically designed for infrasound arrays. The FIBRA system allows deployment of high sensitive, low noise, 5-elements arrays with fiber optic connection between a central receiver (FIBRA) and up to 5 array elements (transmitters – Prs0025f). This prevents significant signal loss even for large array deployment and dramatically reduces the risk of system damages related to lightning.
A/D conversion of pressure data, both from embedded pressure transducers or from external pressure sensors, is performed at each array transmitter, and digital pressure data, together with internal temperature and battery voltage, is transmitted through fiber optic cable to the central receiver.
GPS time stamped digital data are made available @ 50 Hz for transmission and/or recording. Additionally, data are recorded on removable USB pen drive.
An embedded seedlink server allows easy operation and deployement as well as inclusion in acquisition system such as earthworm and wiston.
Features
- – 5 fiber optic channels.
- – A/D conversion performed at each array element (transmitters) at 180 Hz, merged together at the receiver with the additional digital input and analogue channels and provided @ 50 Hz.
- – GPS receiver for time synchronization and instrument positioning.
- – Embedded WEB console for station configuration.
- – protocol access: TCP/IP, SFTP, SSH.
- – Embedded Seedlink server for mseed data streaming.
- – Removable 16 GByte USB memory stick for data (raw and mseed) recording.
- – Low system power consumption (< 3 W).
- – Internal electronic thermometer and voltage for the 5 array elements.
We can provide cases for direct field installation, including battery and solar panel to be self-sufficient, below an example :
