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| Tools & Home Improvement > Hardware > Padlocks & Hasps > Keyed Padlocks |
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| Product Description 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. Earthquake Detector Alert Alarm PGS047 Shipping Weight: 13 ounces | ||||||||
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