Fundamental environmental information is necessary to preserve stone caves. An advanced environmental monitoring system, wireless sensor network, was installed in the Longyou Grottoes, China, in August 2010. This study develops a system by which a filed manager and his/her cooperating researchers are able to continuously monitor environmental conditions in and around caves. It confirms that wireless monitoring is effective, even if observed objects, such as Cave 2 and Cave 3, are far from the base station. The outside air did not affect Cave 2 and affected only the upper part of Cave 3 during the surveillance period. These findings are based on the date of first 50 days of monitoring. The next step is to observe the seasonal variations and differences of the caves.
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