Infiltec INFRA20 infrasound Monitor For labratory, field, school, office, or home use to record and analyze infrasound. This infrasound monitor comes with a 15 ft (4m) serial cable, 15 ft (4m) of 1/8 inch ID plastic tubing, a USB-Serial adapter, and a CD contianing Windows software and software manual. Detects infrasound in the 0.05 Hz to 20 Hz band that is generally inaudible to the human ear. Applications include monitoring wind turbines, machinery noise, building noise, elephants and other large animals, meteors, avalanches, volcanoes, earthquakes, cryptozoology studies of big foot and sasquatch, and paranormal investigations. Requires an attached PC to log and display infrasound data, but other programs can run on PC while the infrasound data logging program is running. Works with Windows XP and above. The seismic data logging and analysis program AmaSeis is supplied on CD. Also runs with the new jAmaseis seismic software that runs on Windows, Linux and MAC OS. The infrasound sensor is a differential pressure sensor with 1/8 inch ID tubing connection that is located on the side of the box that allows for tubing to be used to separate the monitor from the infrasound sensing location. The monitor is self adjusting, and never needs alignment, zeroing, leveling, or any other adjustments. No external power supply required. Setup takes minutes. Resolution is 0.001 Pascal (0.01 microbar). Range is 25 Pascals. Sampling rate is 50 sps. Serial output data format is 9600bps, 8N1, 16 bit ASCII. The INFRA20 is not very sensitive to vibration or orientation, but it is very sensitive to temperature changes or altitude changes. Serial extension cables up to 100 ft can be used to connect it to the data logging PC.