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Dave Bunnell wrote:We're replacing a cave gate on a somewhat remote cave on forest service land and wanted to institute some security measures as the gate has been breached before. What we'd like is some sort of photo/video surveillance and maybe a switch that could send a signal if the gate were breached. There is cell service at the cave so the devices might use a cell network to signal.
Does anyone have any experience with something like this, or know of commercially available devices, or could point me to someone who does?
Dave
Dave Bunnell wrote:We're replacing a cave gate on a somewhat remote cave on forest service land and wanted to institute some security measures as the gate has been breached before. What we'd like is some sort of photo/video surveillance and maybe a switch that could send a signal if the gate were breached. There is cell service at the cave so the devices might use a cell network to signal.
tncaver wrote:Your know....I think a very loud audible alarm is an excellent idea.
NZcaver wrote:A pair of piezo screamers might work well. They're little round cylinders, a few inches in diameter. We used to install them in homes and businesses, normally one per premises but sometimes more. They emit a very piercing fast oscillating tone, and using a pair spaced at opposite corners of a room (or cave entrance) will induce a kind of asynchronous interference pattern which can be quite painful to the human ear. These are much more effective than the common square box on the wall internal siren you see used with most US security systems. Earplugs will help, but these things put out over 100db at 3 feet so there's really no escaping the noise.
ArCaver wrote:How would these affect bats and other critters in the cave?
NZcaver wrote:ArCaver wrote: Assuming it was set up like any other professionally installed system it would *never* false alarm,
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