By detectable simultaneously, we mean these BLE beacons are all active at the same time and you want to query all their locations in real time every 5 seconds. Bluetooth Beacon Tracker can be used to track up to several hundred devices at the same time without problems. If you need to track more devices, we can provide more computing capacity and in that case you should be able to track tens or hundreds thousands of devices at the same time. Each node can detect up to 100 different BLE beacons in every 5 seconds time slot. This number might not seem much, but it should be kept into account that the reception radius of a node is 30 meters at most (in open space) and, even if the BLE beacons are all “active” at the same time, they rarely transmit constantly, but rather they transmit in short sporadic bursts. Over a period of 1 hour, a single node can report up to 72’000 different BLE beacons (720 reports * 100 unique different BLE beacons/report). Anyway since BLE beacons do not transmit simultaneously at the same time, the numbers discussed above are even larger!