$$ Earthquake Detector Alert Alarm PGS047

best deal Earthquake Detector Alert Alarm PGS047

Amazon: Customer Reviews: Earthquake Detector Alert Alarm PGS047 5 stars. "Best technologic device against earthquake attacks" Really, I have three different models of earthquake detector alarms and this model is so far the best i

PGS-047 earthquake alarm has two sensors, the sensor in the left side if for detecting the P wave and the other sensor in right side is for detecting the S wave, so, the item can detect the P wave except the shallow earthquake, maybe it can't be detected sometimes. After the P wave, the S wave also can be detected, it will make different sounds when detected the P wave and S wave.

S wave (red light( is the destructive earthquake wave and the alarm will detect first the compression waves (P waves --red light) with a particular sound. The time between both alarms are apron 10-15 seconds. When t

Earthquake Detector Alert Alarm PGS047

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Earthquake Detector Alert Alarm PGS047 Features :

• Detects earthquakes greater than 3.0 magnitude, DIY--It does not need that you calibrate it like other earthquake alarms.
• This earthquake alarm can detect the P wave, it has been tested by the Taiwanese National Center for Research (the seismic simulation tests are accordance with Chi-Chi TCU 129, Taiwan, 9/21/1999), and it is also patentized in USA, Japan, China and Taiwan.
• This earthquake alarm detector can't be affected by any surrounding or environment sound, it only detects quake's wave
• Easy to install and use: Stick the magic tape on the back of the item that can be attached on the wall or there is a hole on the back that also can be hung on the wall
• After triggered the sensors of the P wave and S wave, the item will sound, around 7 seconds later, the sound will stop automatically.

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