Our unique chain link fence Vibration Sensors have a built in microprocessor and cover about 50 feet of fence (25 feet on either side of sensor). There are four sensitivity settings so each sensor can be tuned to the section of fence where it is mounted. Sensor is also programmed to compensate for high wind conditions. Connect one or more sensors on the same 4 conductor shielded cable for power, intrusion alarm and power failure alarm. “Technical and installation support from Flair was first rate. Their help with the vibration sensors made the job easy. The customer is pleased with the security system and I plan to go after more of this business with them.” John Plemmons Gold Key Lock & Security Hardware, Inc.