The range at which active RFID tags can be read varies depending on several factors, including the type of tag, the frequency it operates on, the power of the reader, and the environment in which it's deployed.
Generally, active RFID tags have a longer range compared to passive RFID tags because they have their own power source (like a battery) to transmit signals, whereas passive RFID tags rely on power from the reader to transmit data.
Active RFID tags can typically be read from tens to hundreds of meters away, sometimes even further under optimal conditions. Some advanced active RFID systems can achieve ranges of over a kilometer. However, factors such as interference from other devices, physical obstacles, and the presence of materials that absorb radio waves can all affect the effective range of active RFID systems.
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